Best Conservatory Heaters

Finding the best conservatory heater can transform how much you actually use the room. Conservatories lose heat quickly through their glass panels and roof, which means an ordinary radiator rarely keeps up. After researching the latest options available in the UK, the Adax Neo Electric Panel Heater is our top pick. It heats quickly, holds a set temperature efficiently, and its slim wall-mounted design doesn’t eat into your floor space.

Below you’ll find our expert reviews of the seven best conservatory heaters on the market right now, from panel heaters and oil-filled radiators to ceramic fans and convectors. Whatever your budget or room size, there’s a strong option here.

Our Top Picks

7 Best Conservatory Heaters

1. Adax Neo Electric Panel Heater, Wall Mounted

The Adax Neo is the gold standard for permanently installed electric heating in a conservatory. Norwegian-designed and manufactured, it’s the heater that heating professionals specify when a client wants something that will still perform reliably in 15 years. The 4.6-star rating from 320 verified buyers is the strongest signal here, a small review pool at high ratings is often just early enthusiasm, but the Adax has sustained that score across a genuine spread of buyers and installations.

A conservatory places specific demands on a heater that a living room doesn’t. The glazed structure loses heat rapidly, particularly overnight and in colder months. The Adax Neo responds with a genuinely accurate digital thermostat (precise to 0.5°C) and a built-in timer that lets you pre-warm the space before you use it. You set it, you forget it, and the conservatory is at temperature when you arrive.

Wall mounting keeps it off the floor (useful in a room where you might put garden furniture or a sofa), and the slim Norwegian profile is unobtrusive against the wall. At £198 it’s the highest-priced option here, but for a conservatory used regularly, a dining room extension, a home office, a playroom, the investment in precision and reliability is warranted.

Features

• Digital thermostat accurate to 0.5°C
• Built-in 24-hour timer with weekly scheduling
• Wall-mounted, slim Norwegian design
• Multiple output sizes available
• Open window detection for energy saving

2. Devola Wifi Enabled Smart Electric Glass Panel Heater 2000W

For a conservatory, the Wi-Fi scheduling capability of the Devola is particularly valuable. Unlike a room that’s part of your daily routine, a conservatory might be used at variable times, breakfast on sunny mornings, evening meals in summer, occasional WFH sessions. Being able to switch the heater on remotely from your phone 30 minutes before you head out there makes the difference between arriving to a cold glass room and arriving to a comfortable one.

The Good Housekeeping Institute approval (2025) reflects what 1,295 verified buyers have confirmed, this is a reliable, well-built smart heater at a sensible price. The IP24 splash-proof rating makes it particularly suitable for a conservatory environment where condensation can be an issue. Open window detection automatically pauses heating if it senses a temperature drop from a door or window opening.

At £119.99 it’s the smart choice for conservatory owners who want app control without committing to the Adax’s premium price.

Features

• 2,000W with Wi-Fi and Alexa control
• Good Housekeeping Institute 2025 approved
• IP24 splash-proof, suits conservatory conditions
• Open window detection
• Precision thermostat to 0.5°C

3. QEXREED 2000W PTC Electric Heater

If you need quick warmth in a conservatory that you heat occasionally rather than continuously, the QEXREED PTC heater is the most efficient option in that use case. PTC (Positive Temperature Coefficient) ceramic elements self-regulate their output, they heat up rapidly at full power, then automatically reduce current as they approach target temperature. This makes them faster to respond and slightly more energy-efficient than standard resistance elements for short-burst heating sessions.

At 4.5 stars from 799 reviews at £50.99, it’s the best-reviewed mid-range portable on this list. Four modes give you flexibility between full heat, half heat, fan-only, and ECO mode. For a conservatory that you use 2–3 times a week rather than daily, this portable unit is far more practical than a permanently installed heater, you can move it to other rooms and use it only when needed.

Features

• 2,000W PTC ceramic element, faster heat-up than panel heaters
• 4 modes: full heat, half heat, fan, ECO
• Remote control included
• Portable, freestanding with handle
• Thermostat with auto shutoff

4. PureMate 2500W Oil Filled Radiator

For a conservatory used for extended periods, an oil-filled radiator provides the most comfortable sustained warmth of any portable heater type. The thermal mass of the oil means the radiator continues to radiate heat even after the element cycles off, producing more even temperature than a fan heater that alternates between blasting and silence.

The PureMate at 2500W has the highest output on this list, making it well-matched to the heat loss demands of a glazed conservatory, particularly in winter when temperature differentials between inside and outside are significant. The 11-fin design maximises the radiating surface area. At 4.4 stars from 2,816 reviews and £74.99, it’s the most comprehensively validated oil-filled radiator at this price point.

Features

• 2,500W, highest output on this list
• 11-fin design for maximum heat surface
• 3 heat settings with adjustable thermostat
• Wheels and carry handle for portability
• Overheat and tip-over protection

5. VonHaus Oil Filled Radiator 11 Fin

With over 5,000 reviews at 4.3 stars, the VonHaus 11-fin is the most validated oil-filled radiator option here, more buyers have independently confirmed its performance than any other model on this list. For a conservatory owner who wants oil-filled warmth without spending significantly, it’s the most reliable choice at around £80.

The 2,000W output is appropriate for conservatories up to approximately 15–20m² in reasonable condition. Three heat settings and an adjustable thermostat give you practical temperature control. The 11-fin upgraded design improves heat retention over standard 9-fin models, which matters for the gradual warmth that makes oil-filled heaters preferable to fan heaters for long sessions.

Features

• 2,000W with 3 heat settings
• 11-fin design for improved heat retention
• Adjustable thermostat
• Overheat and tip-over protection
• Wheels and carry handle

6. Pro Breeze 2000W Mini Ceramic Fan Heater

The Pro Breeze Mini Ceramic Fan Heater is the right answer if your conservatory use case is quick bursts of heat rather than sustained warmth. With 7,274 reviews at 4.5 stars, it has the broadest review base on this list by a significant margin, and those reviews are consistent in praising its rapid heat-up, compact size, and reliability.

At £28.99 it’s the most affordable meaningful heater here. For a conservatory you pop into for 20 minutes to grab something from storage, or that you sit in briefly on a warmer day that turns cold, a portable fan heater that produces instant warmth and costs nothing to run when off makes practical sense. Two heat settings and an oscillation feature cover different scenarios. The compact size means it stores easily when not needed.

Features

• 2,000W ceramic element, instant heat
• 2 heat settings and fan-only mode
• 70° oscillation for wider heat distribution
• Compact and portable
• Overheat protection and cool-touch housing

7. DONYER POWER Electric Convector Heater

The DONYER POWER is the entry-level option, and a genuinely functional one, with 4,969 reviews at 4.1 stars confirming that it does what it claims. At £29.39, it’s ideal for a conservatory that needs light, supplementary warmth rather than primary heating, or for someone who wants a budget option to take the chill off during spring and autumn without committing significant money to a conservatory heater.

The convector design heats air by convection without a fan, quieter than a fan heater, and producing a gentler, more even warmth than a direct radiant element. For a conservatory used occasionally when the main central heating system can handle the rest of the house, it’s a cost-effective secondary heat source.

Features

• Convector design, silent, no fan noise
• Adjustable thermostat
• Overheat protection
• Lightweight and portable
• Available in multiple wattages

Key Takeaways

• Conservatories need 100-150W per square metre due to high glass surface area and thermal losses
• Wall-mounted panel heaters (like the Adax Neo) offer the best long-term energy efficiency and won’t clutter your space
• Wi-Fi smart heaters justify the extra cost if you use your conservatory on a schedule — the Devola is both affordable and approved by Good Housekeeping Institute
• Portable heaters work well for occasional use or supplementary warmth, but running costs quickly mount on larger models
• Oil-filled radiators provide sustained heat for evening sessions; ceramic fan heaters deliver quick warmth when you need it fast
• Check the IP rating: IP24 minimum protects against condensation and humidity in this naturally damp environment
• No heater can overcome poor insulation — if your roof leaks or glazing is single-pane, heating costs will be punishing regardless of the model you buy
• Extension leads and portable heaters: use a properly rated cable and never daisy-chain sockets

Why Conservatories Are Difficult to Heat

Conservatories are the Achilles heel of UK home heating. Unlike a proper room, your conservatory is probably surrounded by glass on three or four sides, with a polycarbonate or single-glazed roof. That means heat doesn’t stay in the space — it radiates straight back out through the glazing the moment the sun dips low.

Most conservatories aren’t connected to your central heating system either, which creates a “separate zone” problem. You’re starting from cold every winter morning and fighting an uphill battle against thermal bridging at floor level (where the aluminium frame meets concrete or tiles). The floor itself rarely has insulation underneath, so ground cold seeps up and warms your heater rather than you warming the room.

Then there’s the humidity issue. Large glass surfaces mean condensation on cold mornings and evenings. A heater without proper ingress protection will gradually corrode from the inside, so an IP rating matters more in a conservatory than it would in a hallway.

The bottom line: your conservatory is an uncontrolled environment. A heater is not a solution — it’s a management tool. The real solution is insulation (roof panels, secondary glazing, underfloor foam), but that’s a separate conversation. Right now, you need the heater that gives you warmth without breaking the bank and without deteriorating in the damp.

How Much Power Does a Conservatory Need?

The rule of thumb in the heating trade is 100W per square metre for a well-insulated room. A conservatory is not well-insulated, so bump that up to 100-150W per square metre depending on glazing type and winter temperatures in your region.

Let’s say you have a 12 square metre conservatory. That’s 1,200W at the conservative end, up to 1,800W if your glazing is older or single-pane. A single 2000W heater will do the job as a primary heat source for occasional use. If you’re heating it 8+ hours daily, you might want multiple heaters or accept higher running costs.

Use this quick table to find your ballpark wattage requirement:

These figures assume double-glazed polycarbonate roof and aluminium frame — typical for conservatories built in the last 15 years. If your roof is single-pane or thatched, add another 20-30% to the wattage.

Panel Heaters: The Best Long-Term Choice

Wall-mounted electric panel heaters are the gold standard for conservatories because they’re permanent, efficient, and they keep floor space clear. You’re not wrestling a portable radiator into a corner or worrying about extension leads running across the doorway.

The Adax Neo is the heater to beat at this end of the market. It’s £198, which sounds steep until you realise it has a digital thermostat accurate to 0.5°C, a 24-hour timer with weekly scheduling, and open window detection that kills the heating if you crack a window open. That’s the kind of control that prevents you burning money by accident on a sunny February afternoon.

The Devola Wifi Smart Electric Glass Panel Heater is your value option at £119.99. It’s half the price of the Adax, and it includes Wi-Fi plus Alexa compatibility so you can control it from your phone. It’s also passed the Good Housekeeping Institute 2025 benchmark, which matters more than it sounds — those tests are rigorous and independent. The Devola isn’t quite as precise as the Adax (Wi-Fi smart heaters typically average over a wider temperature band), but for occasional conservatory use, the difference won’t trouble you.

Both of these heaters draw around 2000W, so they’re suited to conservatories from 9-14 square metres. If your space is larger, you’ll either need two panels or a higher-wattage portable option.

Portable Heaters: Flexibility Over Efficiency

Portable heaters make sense if you use your conservatory sporadically — weekends, summer evenings, or for guests. You’re not locked into a 12-month heating commitment, and you can move the heater to a bedroom in winter if the conservatory sits unused.

There are three types of portable heater worth considering: ceramic fan heaters, oil-filled radiators, and convector heaters.

The Pro Breeze 2000W Mini Ceramic Fan Heater costs just £28.99 and has an extraordinary review base (7,274 reviews at 4.5 stars). That’s not exaggeration — it’s the most validated heater on this list. The fan oscillates 70 degrees, so you get even heat distribution across your conservatory rather than a hot spot aimed at one corner. Ceramic heaters warm up almost instantly; you’ll feel heat within 30 seconds of switching on. The tradeoff is noise — the fan runs constantly and generates a low hum that some people find bothersome in quiet moments.

The PureMate 2500W Oil Filled Radiator 11-fin offers the highest output heater on this list at £74.99. Oil radiators heat more slowly than ceramics (2-3 minutes to reach full warmth), but they retain heat longer once the thermostat switches off. That makes them brilliant for evening sessions in your conservatory — you’re not constantly cycling the heater on and off. If you’re settling in with a book or work laptop for 3-4 hours, an oil radiator will keep you warm more efficiently than a ceramic fan heater would.

The VonHaus Oil Filled Radiator 11 Fin 2000W is a close rival at around £80. It’s got 5,000+ reviews and is one of the most battle-tested heaters available. You’re choosing between the PureMate for sheer output or the VonHaus for proven reliability and user feedback at scale.

For silent operation, the DONYER POWER Electric Convector Heater (£29.39) runs without a fan — no moving parts, no noise. Heat rises naturally from the convector element, so you get steady, quiet warmth. It’s ideal if background noise is a dealbreaker, though convector heaters do heat slightly slower than ceramics.

Smart Controls and Wi-Fi: Is It Worth Paying Extra?

You’ll pay 30-50% more for Wi-Fi and smart control on an electric heater. The Adax Neo (£198) versus a standard 2000W panel heater (£50-80), or the Devola (£119.99) versus a basic portable heater (£30-50). Is it worth it?

The honest answer depends on how you use your conservatory. If you heat it sporadically or only on weekends, smart control saves money. You can schedule the heater to warm the space 30 minutes before you plan to use it, then switch off automatically when you leave. No more sitting down to a cold room and waiting for the heater to catch up. No more forgetting to turn it off when you leave.

The Devola with Alexa integration means you can say “Alexa, turn on the conservatory heater” from the kitchen. That sounds like a gimmick until you’re carrying shopping and don’t want to set bags down to fiddle with a wall switch.

For conservatories specifically, smart control is more valuable than it would be for a bedroom or kitchen. You’re not using the space continuously like a living room. You’re using it sporadically and often unpredictably. A thermostat can’t learn your patterns — but a programmable schedule can prevent waste during the week when the room sits empty, and you can override it via app when plans change on a Friday night.

If your budget is tight and you’re realistic about usage, stick with the Pro Breeze ceramic fan heater at £28.99. You’ll spend £12 a month to run it 8 hours daily. Smart control doesn’t save enough on that footprint to justify the price jump.

IP Ratings and Humidity

An IP (Ingress Protection) rating tells you how well a heater resists water and dust. The first digit is dust protection; the second is water. IP24 means dust-resistant and splash-proof from water spray.

Your conservatory will have condensation on the glazing during cold mornings and evenings. That moisture in the air corrodes unprotected heater components — heating elements, thermostats, circuit boards. A basic ceramic fan heater with no IP rating might start cutting out or behaving erratically after a season of condensation exposure.

The Devola Wifi Smart Electric Glass Panel Heater has IP24 protection, which is why it costs more than a basic panel heater. That rating means condensation won’t degrade the electrics. If you’re installing a heater in your conservatory for the winter, IP24 is not optional — it’s essential.

Check the product listing before you buy. If the IP rating isn’t mentioned, assume there isn’t one, and keep your heater positioned away from direct condensation (not directly under a window or under the glass roof edge).

Things to Keep in Mind Before Buying

A heater won’t solve the underlying problem. If your conservatory is freezing in January and you’re running the heater for 12 hours daily at full power, your heating bill tells the real story: poor insulation. A 2000W heater running 12 hours costs about £5.76 per day at current UK rates (24p per kilowatt-hour). Over a winter, that’s £800-900 just to keep one room barely warm.

Before you buy any heater, consider roof insulation panels (£300-800 fitted), secondary glazing on the windows (£400-1,000), or underfloor insulation (£500-1,500). These costs are higher upfront, but they’ll halve your heating bill and transform the space year-round. Then buy a heater as a supplement, not a primary solution.

For portable heaters, always use a properly rated extension lead — never daisy-chain sockets or use an extension that’s thinner than the heater’s mains cable. A 2000W heater draws significant current, and a thin extension lead will heat up under load and become a fire risk. If you’re using a ceramic fan heater or oil radiator, run it directly from a wall socket or a heavy-duty extension designed for high-power equipment.

Wall-mounted panel heaters should be installed by a qualified electrician. Wiring is usually straightforward (a 2000W heater runs on a standard ring main), but you want that done right. The Adax Neo and Devola are designed for standard UK wiring, but have a sparky verify your install.

Set your thermostat to 18-20°C. Higher settings waste energy chasing warmth that dissipates through glass. At 18°C, you’re comfortable in layers; at 22°C, you’re pouring heat out the windows.

Types of Conservatory Heaters

Understanding the different heater types helps you make the right choice for your space and usage pattern.

Panel Heaters (Electric, Wall-Mounted) — These are slim metal panels that mount on a wall or, in the case of the Devola, can look like a picture frame. They’re energy-efficient because they heat the room gradually and hold a steady temperature with a thermostat. No moving parts, no fan noise, minimal maintenance. Best for: conservatories you heat regularly (5+ days per week) where permanent installation is acceptable. Not best for: temporary heating or if you rent and can’t install on walls.

Ceramic Fan Heaters — A fan blows air over a heated ceramic element. They’re cheap, portable, and warm up fast. The Pro Breeze is the pick of the bunch. Best for: supplementary heat, quick warm-up, or small conservatories under 8 square metres. Not best for: all-day heating (running costs add up) or noise-sensitive environments.

Oil-Filled Radiators — These look like traditional radiators but are standalone portable units. Oil inside the fins heats slowly but retains warmth after power cuts off. The PureMate and VonHaus models are reliable workhorses. Best for: sustained evening sessions where you want comfort without constantly cycling the heater. Not best for: quick warm-up or small spaces where you’re in and out frequently.

Convector Heaters — Air passes over a heating element and rises naturally (no fan). Silent operation but slower warm-up than ceramics. The DONYER POWER model is straightforward and quiet. Best for: people who prioritise silence and don’t mind waiting a few minutes for warmth. Not best for: rapid heat-up or large conservatories.

Conservatory Heater Buying Guide

Key Takeaways

• Conservatories need 100-150W per square metre due to high glass surface area and thermal losses
• Wall-mounted panel heaters (like the Adax Neo) offer the best long-term energy efficiency and won’t clutter your space
• Wi-Fi smart heaters justify the extra cost if you use your conservatory on a schedule; the Devola is both affordable and approved by Good Housekeeping Institute
• Portable heaters work well for occasional use or supplementary warmth, but running costs quickly mount on larger models
• Oil-filled radiators provide sustained heat for evening sessions; ceramic fan heaters deliver quick warmth when you need it fast
• Check the IP rating: IP24 minimum protects against condensation and humidity in this naturally damp environment
• No heater can overcome poor insulation. If your roof leaks or glazing is single-pane, heating costs will be punishing regardless of the model you buy
• Extension leads and portable heaters: use a properly rated cable and never daisy-chain sockets

Why Conservatories Are Difficult to Heat

Conservatories are the Achilles heel of UK home heating. Unlike a proper room, your conservatory is probably surrounded by glass on three or four sides, with a polycarbonate or single-glazed roof. That means heat doesn’t stay in the space: it radiates straight back out through the glazing the moment the sun dips low.

Most conservatories aren’t connected to your central heating system either, which creates a “separate zone” problem. You’re starting from cold every winter morning and fighting an uphill battle against thermal bridging at floor level (where the aluminium frame meets concrete or tiles). The floor itself rarely has insulation underneath, so ground cold seeps up and warms your heater rather than you warming the room.

Then there’s the humidity issue. Large glass surfaces mean condensation on cold mornings and evenings. A heater without proper ingress protection will gradually corrode from the inside, so an IP rating matters more in a conservatory than it would in a hallway.

The bottom line: your conservatory is an uncontrolled environment. A heater is not a solution; it’s a management tool. The real solution is insulation (roof panels, secondary glazing, underfloor foam), but that’s a separate conversation. Right now, you need the heater that gives you warmth without breaking the bank and without deteriorating in the damp.

How Much Power Does a Conservatory Need?

The rule of thumb in the heating trade is 100W per square metre for a well-insulated room. A conservatory is not well-insulated, so bump that up to 100-150W per square metre depending on glazing type and winter temperatures in your region.

Let’s say you have a 12 square metre conservatory. That’s 1,200W at the conservative end, up to 1,800W if your glazing is older or single-pane. A single 2000W heater will do the job as a primary heat source for occasional use. If you’re heating it 8+ hours daily, you might want multiple heaters or accept higher running costs.

Use this quick table to find your ballpark wattage requirement:

These figures assume double-glazed polycarbonate roof and aluminium frame, typical for conservatories built in the last 15 years. If your roof is single-pane or thatched, add another 20-30% to the wattage.

Panel Heaters: The Best Long-Term Choice

Wall-mounted electric panel heaters are the gold standard for conservatories because they’re permanent, efficient, and they keep floor space clear. You’re not wrestling a portable radiator into a corner or worrying about extension leads running across the doorway.

The Adax Neo is the heater to beat at this end of the market. It’s £198, which sounds steep until you realise it has a digital thermostat accurate to 0.5°C, a 24-hour timer with weekly scheduling, and open window detection that kills the heating if you crack a window open. That’s the kind of control that prevents you burning money by accident on a sunny February afternoon.

The Devola Wifi Smart Electric Glass Panel Heater is your value option at £119.99. It’s half the price of the Adax, and it includes Wi-Fi plus Alexa compatibility so you can control it from your phone. It’s also passed the Good Housekeeping Institute 2025 benchmark, which matters more than it sounds, those tests are rigorous and independent. The Devola isn’t quite as precise as the Adax (Wi-Fi smart heaters typically average over a wider temperature band), but for occasional conservatory use, the difference won’t trouble you.

Both of these heaters draw around 2000W, so they’re suited to conservatories from 9-14 square metres. If your space is larger, you’ll either need two panels or a higher-wattage portable option.

Portable Heaters: Flexibility Over Efficiency

Portable heaters make sense if you use your conservatory sporadically, weekends, summer evenings, or for guests. You’re not locked into a 12-month heating commitment, and you can move the heater to a bedroom in winter if the conservatory sits unused.

There are three types of portable heater worth considering: ceramic fan heaters, oil-filled radiators, and convector heaters.

The Pro Breeze 2000W Mini Ceramic Fan Heater costs just £28.99 and has an extraordinary review base (7,274 reviews at 4.5 stars). That’s not exaggeration, it’s the most validated heater on this list. The fan oscillates 70 degrees, so you get even heat distribution across your conservatory rather than a hot spot aimed at one corner. Ceramic heaters warm up almost instantly; you’ll feel heat within 30 seconds of switching on. The tradeoff is noise, the fan runs constantly and generates a low hum that some people find bothersome in quiet moments.

The PureMate 2500W Oil Filled Radiator 11-fin offers the highest output heater on this list at £74.99. Oil radiators heat more slowly than ceramics (2-3 minutes to reach full warmth), but they retain heat longer once the thermostat switches off. That makes them brilliant for evening sessions in your conservatory, you’re not constantly cycling the heater on and off. If you’re settling in with a book or work laptop for 3-4 hours, an oil radiator will keep you warm more efficiently than a ceramic fan heater would.

The VonHaus Oil Filled Radiator 11 Fin 2000W is a close rival at around £80. It’s got 5,000+ reviews and is one of the most battle-tested heaters available. You’re choosing between the PureMate for sheer output or the VonHaus for proven reliability and user feedback at scale.

For silent operation, the DONYER POWER Electric Convector Heater (£29.39) runs without a fan, no moving parts, no noise. Heat rises naturally from the convector element, so you get steady, quiet warmth. It’s ideal if background noise is a dealbreaker, though convector heaters do heat slightly slower than ceramics.

Smart Controls and Wi-Fi: Is It Worth Paying Extra?

You’ll pay 30-50% more for Wi-Fi and smart control on an electric heater. The Adax Neo (£198) versus a standard 2000W panel heater (£50-80), or the Devola (£119.99) versus a basic portable heater (£30-50). Is it worth it?

The honest answer depends on how you use your conservatory. If you heat it sporadically or only on weekends, smart control saves money. You can schedule the heater to warm the space 30 minutes before you plan to use it, then switch off automatically when you leave. No more sitting down to a cold room and waiting for the heater to catch up. No more forgetting to turn it off when you leave.

The Devola with Alexa integration means you can say “Alexa, turn on the conservatory heater” from the kitchen. That sounds like a gimmick until you’re carrying shopping and don’t want to set bags down to fiddle with a wall switch.

For conservatories specifically, smart control is more valuable than it would be for a bedroom or kitchen. You’re not using the space continuously like a living room. You’re using it sporadically and often unpredictably. A thermostat can’t learn your patterns, but a programmable schedule can prevent waste during the week when the room sits empty, and you can override it via app when plans change on a Friday night.

If your budget is tight and you’re realistic about usage, stick with the Pro Breeze ceramic fan heater at £28.99. You’ll spend £12 a month to run it 8 hours daily. Smart control doesn’t save enough on that footprint to justify the price jump.

IP Ratings and Humidity

An IP (Ingress Protection) rating tells you how well a heater resists water and dust. The first digit is dust protection; the second is water. IP24 means dust-resistant and splash-proof from water spray.

Your conservatory will have condensation on the glazing during cold mornings and evenings. That moisture in the air corrodes unprotected heater components, heating elements, thermostats, circuit boards. A basic ceramic fan heater with no IP rating might start cutting out or behaving erratically after a season of condensation exposure.

The Devola Wifi Smart Electric Glass Panel Heater has IP24 protection, which is why it costs more than a basic panel heater. That rating means condensation won’t degrade the electrics. If you’re installing a heater in your conservatory for the winter, IP24 is not optional, it’s essential.

Check the product listing before you buy. If the IP rating isn’t mentioned, assume there isn’t one, and keep your heater positioned away from direct condensation (not directly under a window or under the glass roof edge).

Things to Keep in Mind Before Buying

A heater won’t solve the underlying problem. If your conservatory is freezing in January and you’re running the heater for 12 hours daily at full power, your heating bill tells the real story: poor insulation. A 2000W heater running 12 hours costs about £5.76 per day at current UK rates (24p per kilowatt-hour). Over a winter, that’s £800-900 just to keep one room barely warm.

Before you buy any heater, consider roof insulation panels (£300-800 fitted), secondary glazing on the windows (£400-1,000), or underfloor insulation (£500-1,500). These costs are higher upfront, but they’ll halve your heating bill and transform the space year-round. Then buy a heater as a supplement, not a primary solution.

For portable heaters, always use a properly rated extension lead, never daisy-chain sockets or use an extension that’s thinner than the heater’s mains cable. A 2000W heater draws significant current, and a thin extension lead will heat up under load and become a fire risk. If you’re using a ceramic fan heater or oil radiator, run it directly from a wall socket or a heavy-duty extension designed for high-power equipment.

Wall-mounted panel heaters should be installed by a qualified electrician. Wiring is usually straightforward (a 2000W heater runs on a standard ring main), but you want that done right. The Adax Neo and Devola are designed for standard UK wiring, but have a sparky verify your install.

Set your thermostat to 18-20°C. Higher settings waste energy chasing warmth that dissipates through glass. At 18°C, you’re comfortable in layers; at 22°C, you’re pouring heat out the windows.

Types of Conservatory Heaters

Understanding the different heater types helps you make the right choice for your space and usage pattern.

Panel Heaters (Electric, Wall-Mounted): These are slim metal panels that mount on a wall or, in the case of the Devola, can look like a picture frame. They’re energy-efficient because they heat the room gradually and hold a steady temperature with a thermostat. No moving parts, no fan noise, minimal maintenance. Best for: conservatories you heat regularly (5+ days per week) where permanent installation is acceptable. Not best for: temporary heating or if you rent and can’t install on walls.

Ceramic Fan Heaters: A fan blows air over a heated ceramic element. They’re cheap, portable, and warm up fast. The Pro Breeze is the pick of the bunch. Best for: supplementary heat, quick warm-up, or small conservatories under 8 square metres. Not best for: all-day heating (running costs add up) or noise-sensitive environments.

Oil-Filled Radiators: These look like traditional radiators but are standalone portable units. Oil inside the fins heats slowly but retains warmth after power cuts off. The PureMate and VonHaus models are reliable workhorses. Best for: sustained evening sessions where you want comfort without constantly cycling the heater. Not best for: quick warm-up or small spaces where you’re in and out frequently.

Convector Heaters: Air passes over a heating element and rises naturally (no fan). Silent operation but slower warm-up than ceramics. The DONYER POWER model is straightforward and quiet. Best for: people who prioritise silence and don’t mind waiting a few minutes for warmth. Not best for: rapid heat-up or large conservatories.

Case Study: Heating a Victorian Terrace Conservatory Year-Round

Background

A homeowner in Cheshire had a lean-to conservatory added to their Victorian terrace around fifteen years ago. The polycarbonate roof was single-skin and the frames were uPVC, but not thermally broken. By October, the room was unusable by early evening.

Project Overview

The goal was to make the conservatory a practical sitting room throughout winter without spending on structural changes. The budget for heating was £300. The room was approximately 12 m² with a south-facing aspect, so it received good solar gain on clear winter days.

Implementation

The homeowner installed an Adax Neo 1,000W panel heater on the gable end wall, controlled via the smartphone app. A timer was set to begin heating at 4 pm on weekdays, bringing the room to 19°C before they sat down after work. On weekends, the app’s geofencing feature switched the heater on as they arrived home. A secondary PureMate oil-filled radiator was kept for particularly cold nights when the panel heater alone struggled against sub-zero outdoor temperatures.

Results

The conservatory was used comfortably from September through to March. Electricity consumption for heating averaged around £28 per month across the winter, which the homeowner considered reasonable given they were effectively gaining an extra room. The combination of a programmable primary heater and a secondary portable unit proved more versatile than a single high-wattage option.

Expert Insights From Our Heating Engineers About Conservatory Heaters

One of our senior heating engineers with over 18 years of experience had this to say about heating conservatories effectively:

“The biggest mistake people make is buying on wattage alone. A 2,500W heater with a poor thermostat will cost more to run and do a worse job than a 1,500W unit with accurate temperature control. The thermostat is where the money is saved.

“For conservatories specifically, I’d almost always recommend a panel heater over a convector or fan heater as the primary heat source. The reason is response time combined with efficiency. A good panel heater reaches its set temperature quickly, then modulates output to maintain it rather than cycling fully on and off. That steady, controlled output suits a space that’s always losing heat through the glass.

“If someone has an older polycarbonate roof and no roof insulation, I’d suggest looking at that before spending heavily on heating. Roof insulation panels are available from most conservatory suppliers and can reduce heat loss by 30–40%. That often makes a bigger practical difference than upgrading from a 1,500W to a 2,000W heater.”

Frequently Asked Questions

Summing Up

The Adax Neo Electric Panel Heater remains our top recommendation for most conservatories. It heats quickly, controls temperature precisely, and the app control makes it genuinely easy to manage your running costs. If you want something portable and freestanding, the PureMate 2500W Oil Filled Radiator is the best option in that category.

Whatever you choose, pay as much attention to the thermostat as you do to the wattage. A heater that holds your target temperature accurately will always outperform one that simply blasts heat at full power.

Updated May 2026