How do I convert heater power to the right room size?

Estimate 20–30 BTU per square foot for most rooms. Multiply the room’s square footage by 20–30 to get a target BTU/hour. For example, a 200 square foot room typically needs about 4,000–6,000 BTU/hour, depending on insulation and ceiling height.

Are Wi‑Fi heaters worth it for energy savings?

Yes — when used properly. Wi‑Fi heaters let you schedule heat only when you’re home, reduce wasted runtime, and often offer energy reports. The savings depend on your habits, insulation, and how well you program the schedules.

Which heater type is safest around children and pets?

Look for units with cool-touch surfaces, tip-over switches, and overheat protection. Plinth heaters and panel heaters tend to be less exposed than open-element fan heaters. Adding a guard, like the 39.4-inch Hylite tubular guard, increases safety for tubular elements.

Can a single portable heater warm an open-plan living area?

It depends on output. You’ll need a unit with higher BTU/hour — roughly 8,000–10,000 BTU/hour or more for larger open spaces — and even then, heaters work better as supplemental heat sources. Consider multiple units or a permanent convector for more even coverage.

How can I keep running costs down while using a space heater?

Use a thermostat or timer, zone the heating so you only warm the rooms you use, improve insulation, and choose a heater with appropriate BTU output instead of oversizing. Smart controls and routine maintenance will also reduce wasted energy.

Unlock Incredible Space Heater Deals in the UK

Space Heaters	Price
Halogen Heaters - 800w Or 1200w	£7.99
Portable Fan Heater Plug-in With Timer	£13.99
Alivio Oil-filled Radiator Heater With Adjustable Thermostat - 5, 7, 9 Or 11 Fins	£16.99
2000w Electric Fan Heater With Overheat Protection	£16.99
7-level Electric Heated Blanket - 4 Colours	£17.99
1200w Halogen Heater With Replaceable Bulbs	£17.99
Energy Efficient Heated Clothes Airer - Optional Wings	£19.99
2000w Portable Convector Heater	£22.99
Sealey Peh5001 Industrial Ptc Fan Heater	£64.95
Sealey Iwmh1809r Carbon Fibre Infrared Electric Wall Heater	£88.95

Space Heaters Buying Guide: Top Models, How to Choose, and Energy-Savvy Tips

Why picking the right space heater matters

Choosing the right space heater is more than just grabbing the first sleek unit you see. It’s about matching heat output to room size, safety to lifestyle, and controls to how you actually live. A good heater makes a room cozy without turning your energy bill into a shock, while the wrong one can leave you cold, uncomfortable, or worse — unsafe. Ready to cut through the jargon and pick something that actually fits your home? Let’s dive in.

How to size a heater for your room (simple rule of thumb)

Here’s a quick, practical rule: estimate 20 to 30 BTU per square foot for most rooms in moderate climates. So if your living room is 150 square feet, aim for roughly 3,000 to 4,500 BTU per hour. Larger rooms or poorly insulated spaces might need more. If you prefer formulas, multiply square feet by 20–30 to get a safe BTU/hour range. This keeps your choice rooted in real performance, not just marketing.

Safety and placement basics before you buy

Space heaters get hot — that’s their job. But you can reduce risks by keeping them away from drapes, furniture, and foot traffic, using models with tip-over switches and overheat protection, and avoiding extension cords. Think about placement: downflow models heat higher spots and push warm air along ceilings, while convectors and panel heaters warm the air at floor level. Choose a model that suits the layout of the room and your daily habits.

Dimplex Downflow Fan Heater With Electronic Timer

Key features

The Dimplex downflow fan heater blends quick forced-air warmth with a timer so you can schedule heat bursts before you wake up or return home. Downflow units are designed to push warm air across the room quickly, which is ideal for spaces where you want near-instant comfort.

Best for

This style works well in kitchens, entryways, and small living rooms where you want to feel heat quickly. The electronic timer is handy if you want the heater to kick in for a short period, say 30 minutes, rather than running continuously.

Energy and performance notes

Downflow fan heaters are great for short-term warmth but can be less efficient for maintaining even temperatures over long periods. Use the timer and thermostat to avoid unnecessary runtime and combine with a room thermostat if possible to save energy.

Consort Claudgen He7237sl Fan Heater — about 10,240 BTU/hour

Key features

This fan heater delivers roughly 10,240 BTU per hour, giving fast, powerful heat ideal for quick warm-ups. Fan-assisted models circulate air, spreading heat faster than purely radiant units.

Best for

Choose this for medium to large rooms where immediate warmth is needed — for example, garages, workshops, or family spaces that you use intermittently rather than continuously.

Energy and performance notes

While it’s energetic and effective, powerful fan heaters can drive up running costs if left on constantly. Use lower settings or set the timer to avoid overheating empty rooms.

Hylite Hhg210 Slimline Tubular Heater Guard — 39.4 inches (about 3.28 ft)

Key features

The Hylite slimline tubular heater guard is a safety accessory measuring about 39.4 inches long, designed to protect people (and pets) from direct contact with tubular heating elements. It’s a simple, effective way to reduce burn risk.

Best for

Use this guard in homes with children or pets, or in high-traffic areas where accidental contact is more likely. It pairs well with tubular heaters such as those used in hallways or stairwells.

Energy and performance notes

The guard itself does not affect heat output significantly but increases safety, which often allows you to position heaters more flexibly in the room and achieve better overall warmth distribution.

Consort Claudgen Csl2mlst Radiant Heater — about 6,820 BTU/hour

Key features

This radiant heater provides approximately 6,820 BTU hourly output, focusing heat directly on nearby surfaces and people rather than warming air broadly. Radiant units feel instant and comfortable, especially when seated close by.

Best for

Radiant heaters are excellent in bathrooms, porches, or under a desk — any zone where you want direct, personal warmth rather than warming the entire room.

Energy and performance notes

Because radiant heat targets people and objects, it can be more efficient for short-duration use in small areas. Just be mindful of placement to avoid direct contact or flammable materials.

Sunhouse Shtth2 Tubular Heater — about 273 BTU/hour

Key features

The Sunhouse tubular heater offers a gentle output of about 273 BTU per hour, making it a low-power option for mild heat boosts or draft control. Tubular designs emit steady, even heat along their length.

Best for

Perfect for small spaces like closets, under cabinets, or in utility rooms where only minor warmth is needed to prevent damp or chill.

Energy and performance notes

With a low output, this model consumes little energy and is an economical choice when you need to stave off cold spots rather than heat an entire room.

Hyco Riviera Oil-Filled Radiator — about 6,820 BTU/hour

Key features

An oil-filled radiator contains heated oil that retains warmth and provides gentle, lasting heat — this model gives roughly 6,820 BTU per hour. These units are silent, stable, and continue radiating heat even after they cycle off.

Best for

Oil radiators are ideal for bedrooms and living rooms where you want quiet, steady warmth overnight or for long stretches. They’re slower to heat up but very efficient at maintaining temperature.

Energy and performance notes

Because the oil retains heat, these radiators often cycle on and off less frequently, which can save energy while keeping temperatures comfortable. Pair with a thermostat to prevent wasted runtime.

Hamilton G2 3 Gang Rotary Companion Controller — smart dimmer and control tool

Key features

The Hamilton G2 3 Gang Rotary Companion Controller is a smart-style controller that can manage multiple circuits or dimming functions. While not a heater itself, it enhances how you control heating circuits and lighting in a smart, stylish way.

Best for

Install this with panel heaters or underfloor systems that support external control to consolidate your heating and lighting routines. It’s a neat, tactile upgrade for modern homes.

Energy and performance notes

Smart controls let you trim unnecessary energy use by scheduling and dimming. Even simple rotary companions can cut a surprising amount off your monthly consumption when used to fine-tune heating schedules.

Consort Claudgen Phsl2s Plinth Heater — stainless steel finish

Key features

Plinth heaters tuck neatly under units like kitchen cabinets or within built-in units, providing discreet warmth without taking up floor space. The stainless steel finish keeps things durable and corrosion-resistant.

Best for

These are perfect in kitchens, utility rooms, or vanities where you need hidden heat to prevent condensation or keep feet warm but don’t want a visible heater taking up space.

Energy and performance notes

Plinth heaters can be surprisingly efficient because they target small areas and reduce drafts near the floor. Be mindful of clearance and airflow — don’t block the grille or vent space.

Airvent Panel Heater — about 3,412 BTU/hour

Key features

Panel heaters are slim, wall-mounted units that deliver about 3,412 BTU per hour in this size. They warm the air quietly and blend into modern decors without bulky radiators.

Best for

Great for hallways, bedrooms, and home offices where space is tight and you want low-profile, consistent warmth.

Energy and performance notes

Panel heaters are effective for continuous use, especially when controlled by a thermostat. Their modest output works best in well-insulated rooms or as supplementary heat in larger spaces.

Ezewarm Wi‑Fi Panel Heater — about 3,412 BTU/hour

Key features

The Ezewarm Wi‑Fi panel heater brings the convenience of app control, offering roughly 3,412 BTU per hour. Remote scheduling, geofencing, and energy reports can all be part of the experience.

Best for

If you like scheduling heat from your phone or integrating into smart home setups, this unit fits bedrooms or home offices where precise control matters.

Energy and performance notes

Smart features help you avoid wasting energy — for example, setting the heater to warm the room only when you’re home. Look for models with accurate thermostats to get the most savings.

Atlantic Sokio Panel Heater Vertical — about 6,820 BTU/hour

Key features

The Atlantic Sokio vertical panel is designed for narrow wall spaces, delivering around 6,820 BTU per hour. Vertical panels are great where horizontal space is limited but you still want strong output.

Best for

Perfect for tall, narrow walls in living areas or beside large windows and doors where heat loss is more likely. The vertical design also helps circulate warm air higher in the room.

Energy and performance notes

Vertical panels can be very effective at combating cold walls or drafts if positioned well. Use thermostatic control to balance comfort and economy.

Stiebel Eltron CNS-U 3000 Plus Panel Convector Heater — about 10,240 BTU/hour

Key features

This Stiebel Eltron convector produces approximately 10,240 BTU per hour and is built to deliver robust, even heating across larger rooms. Convector designs warm the air and drive circulation, eliminating cold spots.

Best for

Use this in open-plan living areas, large dens, or spaces with high ceilings where you need a dependable, powerful heat source that distributes warmth evenly.

Energy and performance notes

Convector heaters can heat larger volumes efficiently but benefit from thermostatic control and zoning. Combine with timers or smart controls to avoid running at full power when you’re not around.

Choosing between radiant, convector, and oil-filled heaters

The right heating technology depends on what you want. Radiant heaters give focused warmth to people and objects, convectors warm air and are great for even room temperatures, and oil-filled radiators retain heat and offer silent, long-lasting comfort. Think “instant” vs. “steady”: if you want heat fast, go radiant or fan-assisted; if you want steady, quiet warmth, oil-filled is your friend.

Practical tips to save energy and money

Pair a properly sized heater with good insulation and smart controls. Program timers so heaters only run when needed, seal drafts around windows and doors, and use rugs to reduce heat loss through floors. Even small changes — like dropping the target room temperature by a few degrees — can add up to measurable savings.

Maintenance that keeps heaters safe and efficient

Keep vents and grilles clear of dust, check cords and plugs for wear, and test tip-over and overheat protections regularly. For oil-filled units, periodic visual checks are often enough; for fan heaters, a quick clean of the fan and grille improves airflow and lifespan.

Final buying checklist

Before you buy, answer these questions: What size room am I heating in square feet? Do I need instant or long-lasting warmth? Will this run for hours or just occasionally? Do I need wall-mounting or portability? Is safety (kids, pets) a major concern? Pick the model that checks the most boxes — for example, a Wi‑Fi panel for smart control, a powerful convector for large rooms, or an oil heater for overnight quiet heat.

Conclusion

Space heaters are flexible, cost-effective ways to boost comfort in specific rooms without heating the whole house. From the instant warmth of radiant models to the steady comfort of oil-filled radiators and the convenience of smart panel heaters, there’s a model for every need. Focus on right-sizing with BTU per hour, prioritize safety and controls, and match the heater type to how you actually use the room. With the right choice and a few energy-smart habits, you’ll stay warm without sweating the bills.

Space Heaters

Space Heaters	Price
Halogen Heaters - 800w Or 1200w	£7.99
Portable Fan Heater Plug-in With Timer	£13.99
Alivio Oil-filled Radiator Heater With Adjustable Thermostat - 5, 7, 9 Or 11 Fins	£16.99
2000w Electric Fan Heater With Overheat Protection	£16.99
7-level Electric Heated Blanket - 4 Colours	£17.99
1200w Halogen Heater With Replaceable Bulbs	£17.99
Energy Efficient Heated Clothes Airer - Optional Wings	£19.99
2000w Portable Convector Heater	£22.99
Sealey Peh5001 Industrial Ptc Fan Heater	£64.95
Sealey Iwmh1809r Carbon Fibre Infrared Electric Wall Heater	£88.95

Space Heaters Buying Guide: Top Models, How to Choose, and Energy-Savvy Tips

Why picking the right space heater matters

How to size a heater for your room (simple rule of thumb)

Safety and placement basics before you buy

Dimplex Downflow Fan Heater With Electronic Timer

Key features

Best for

Energy and performance notes

Consort Claudgen He7237sl Fan Heater — about 10,240 BTU/hour

Key features

This fan heater delivers roughly 10,240 BTU per hour, giving fast, powerful heat ideal for quick warm-ups. Fan-assisted models circulate air, spreading heat faster than purely radiant units.

Best for

Choose this for medium to large rooms where immediate warmth is needed — for example, garages, workshops, or family spaces that you use intermittently rather than continuously.

Energy and performance notes

While it’s energetic and effective, powerful fan heaters can drive up running costs if left on constantly. Use lower settings or set the timer to avoid overheating empty rooms.

Hylite Hhg210 Slimline Tubular Heater Guard — 39.4 inches (about 3.28 ft)

Key features

Best for

Use this guard in homes with children or pets, or in high-traffic areas where accidental contact is more likely. It pairs well with tubular heaters such as those used in hallways or stairwells.

Energy and performance notes

The guard itself does not affect heat output significantly but increases safety, which often allows you to position heaters more flexibly in the room and achieve better overall warmth distribution.

Consort Claudgen Csl2mlst Radiant Heater — about 6,820 BTU/hour

Key features

Best for

Radiant heaters are excellent in bathrooms, porches, or under a desk — any zone where you want direct, personal warmth rather than warming the entire room.

Energy and performance notes

Because radiant heat targets people and objects, it can be more efficient for short-duration use in small areas. Just be mindful of placement to avoid direct contact or flammable materials.

Sunhouse Shtth2 Tubular Heater — about 273 BTU/hour

Key features

Best for

Perfect for small spaces like closets, under cabinets, or in utility rooms where only minor warmth is needed to prevent damp or chill.

Energy and performance notes

With a low output, this model consumes little energy and is an economical choice when you need to stave off cold spots rather than heat an entire room.

Hyco Riviera Oil-Filled Radiator — about 6,820 BTU/hour

Key features

Best for

Oil radiators are ideal for bedrooms and living rooms where you want quiet, steady warmth overnight or for long stretches. They’re slower to heat up but very efficient at maintaining temperature.

Energy and performance notes

Because the oil retains heat, these radiators often cycle on and off less frequently, which can save energy while keeping temperatures comfortable. Pair with a thermostat to prevent wasted runtime.

Hamilton G2 3 Gang Rotary Companion Controller — smart dimmer and control tool

Key features

Best for

Install this with panel heaters or underfloor systems that support external control to consolidate your heating and lighting routines. It’s a neat, tactile upgrade for modern homes.

Energy and performance notes

Consort Claudgen Phsl2s Plinth Heater — stainless steel finish

Key features

Best for

These are perfect in kitchens, utility rooms, or vanities where you need hidden heat to prevent condensation or keep feet warm but don’t want a visible heater taking up space.

Energy and performance notes

Plinth heaters can be surprisingly efficient because they target small areas and reduce drafts near the floor. Be mindful of clearance and airflow — don’t block the grille or vent space.

Airvent Panel Heater — about 3,412 BTU/hour

Key features

Panel heaters are slim, wall-mounted units that deliver about 3,412 BTU per hour in this size. They warm the air quietly and blend into modern decors without bulky radiators.

Best for

Great for hallways, bedrooms, and home offices where space is tight and you want low-profile, consistent warmth.

Energy and performance notes

Panel heaters are effective for continuous use, especially when controlled by a thermostat. Their modest output works best in well-insulated rooms or as supplementary heat in larger spaces.

Ezewarm Wi‑Fi Panel Heater — about 3,412 BTU/hour

Key features

The Ezewarm Wi‑Fi panel heater brings the convenience of app control, offering roughly 3,412 BTU per hour. Remote scheduling, geofencing, and energy reports can all be part of the experience.

Best for

If you like scheduling heat from your phone or integrating into smart home setups, this unit fits bedrooms or home offices where precise control matters.

Energy and performance notes

Smart features help you avoid wasting energy — for example, setting the heater to warm the room only when you’re home. Look for models with accurate thermostats to get the most savings.

Atlantic Sokio Panel Heater Vertical — about 6,820 BTU/hour

Key features

Best for

Perfect for tall, narrow walls in living areas or beside large windows and doors where heat loss is more likely. The vertical design also helps circulate warm air higher in the room.

Energy and performance notes

Vertical panels can be very effective at combating cold walls or drafts if positioned well. Use thermostatic control to balance comfort and economy.

Stiebel Eltron CNS-U 3000 Plus Panel Convector Heater — about 10,240 BTU/hour

Key features

Best for

Use this in open-plan living areas, large dens, or spaces with high ceilings where you need a dependable, powerful heat source that distributes warmth evenly.

Energy and performance notes

Convector heaters can heat larger volumes efficiently but benefit from thermostatic control and zoning. Combine with timers or smart controls to avoid running at full power when you’re not around.

Space Heaters

Draper Dsh68 Diesel And Kerosene Space Heater

Draper Esh5000ptc Ptc Electric Space Heater

Draper Psh40c Jet Force Propane Space Heater

2kw Convector Heater

Halogen Heater

Heated Foot Warmer Beurer

2kw Smart Panel Heater With 24hr Timer

Flanur Electric Heaters For Home - Smart Portable 1500w Energy Space Room Heater

Hyundai 37kw Diesel - Kerosene Space Heater

Jcb 70,000btu 20kw Diesel Space Heater - 496m Coverage

Gorilla Electric Tube Heater

2000w Compact Fan Heater

Jcb 70,000btu 20kw Diesel Space Heater - 496m Coverage

Kingavon 400w Digital Plug In Heater

Nedis Smartlife Ceramic Ptc Fan Heater Wi-fi 2000 W 2 Heat Settings Oscillation Display 10 - 49 C Android Ios White

Nedis Smartlife Infrared Heating Panel 700 W 1 Heat Setting Adjustable Thermostat Remote Control Ip44 White

Nedis Smartlife Convection Heater Wi-fi 2000 W 3 Heat Settings Lcd 5 - 37 C Adjustable Thermostat White

Nedis Smartlife Ceramic Ptc Fan Heater Wi-fi 1500 W 2 Heat Settings Oscillation Display 10 - 49 C Android Ios White

Nedis Smartlife Infrared Heating Panel 350 W 1 Heat Setting Adjustable Thermostat Remote Control Ip44 White

Nedis Bathroom Fan Heater - 2kw

Nedis Bathroom Heater, Electric Wall-mountable Radiant Heater With 2 Heat Settings 600 1200w , Tiltable Head, Ipx4 Rated

500w Six Fin Baby Oil-filled Radiator White Crhof320 H

2000w Portable Upright Powerful Electric Fan Heater

800w Portable Energy Efficient Quartz Halogen Heater

2000w Premium Oscillating Ceramic Ptc Tower Heater

Freestanding Convector Radiator Heater 2000w

7-fin White Portable Oil Filled Electric Radiator Heater

11-fin Portable Oil Filled Electric Radiator Heater

Portable Upright Electric Quartz Halogen Heater 800w

9-fin Remote Controlled Electric Oil-filled Radiator Heater

Portable Ceramic Gas Heaters 4.2kw Electric & Piezoelectric Ignition

Grey Oscillating 3-bar Halogen Heater With Handle

1200w Grey Oscillating Portable 3-bar Halogen Heater

2000w Black Freestanding Convector Heater With Thermostat

2000w Energy-efficient Wide Angle Flat Fan Heater

Wi-fi And Remote Controlled Smart Digital Radiator Heater

2kw Smart Glass Panel Heater Wi-fi Wall Mounted Freestanding

5-fin Black Mini Oil Filled Radiator Electric Heater 450w

11-fin Black Digital Oil-filled Radiator Heater 2500w

5-fin White Oil-filled Radiator 450w Electric Heater

Space Heaters price list

Questions and answers about Space Heaters

How do I convert heater power to the right room size?

Estimate 20–30 BTU per square foot for most rooms. Multiply the room’s square footage by 20–30 to get a target BTU/hour. For example, a 200 square foot room typically needs about 4,000–6,000 BTU/hour, depending on insulation and ceiling height.

Are Wi‑Fi heaters worth it for energy savings?

Yes — when used properly. Wi‑Fi heaters let you schedule heat only when you’re home, reduce wasted runtime, and often offer energy reports. The savings depend on your habits, insulation, and how well you program the schedules.

Which heater type is safest around children and pets?

Look for units with cool-touch surfaces, tip-over switches, and overheat protection. Plinth heaters and panel heaters tend to be less exposed than open-element fan heaters. Adding a guard, like the 39.4-inch Hylite tubular guard, increases safety for tubular elements.

Can a single portable heater warm an open-plan living area?

It depends on output. You’ll need a unit with higher BTU/hour — roughly 8,000–10,000 BTU/hour or more for larger open spaces — and even then, heaters work better as supplemental heat sources. Consider multiple units or a permanent convector for more even coverage.

How can I keep running costs down while using a space heater?

Use a thermostat or timer, zone the heating so you only warm the rooms you use, improve insulation, and choose a heater with appropriate BTU output instead of oversizing. Smart controls and routine maintenance will also reduce wasted energy.

Space Heaters Buying Guide: Top Models, How to Choose, and Energy-Savvy Tips

Why picking the right space heater matters

How to size a heater for your room (simple rule of thumb)

Safety and placement basics before you buy

Dimplex Downflow Fan Heater With Electronic Timer

Key features

Best for

Energy and performance notes

Consort Claudgen He7237sl Fan Heater — about 10,240 BTU/hour

Key features

Best for

Energy and performance notes

Hylite Hhg210 Slimline Tubular Heater Guard — 39.4 inches (about 3.28 ft)

Key features

Best for

Energy and performance notes

Consort Claudgen Csl2mlst Radiant Heater — about 6,820 BTU/hour

Key features

Best for

Energy and performance notes

Sunhouse Shtth2 Tubular Heater — about 273 BTU/hour

Key features

Best for

Energy and performance notes

Hyco Riviera Oil-Filled Radiator — about 6,820 BTU/hour

Key features

Best for