Infrared heating is a form of electric radiant heating that transfers warmth directly towards people and solid surfaces rather than relying primarily on heating and circulating room air. This complete guide explains how infrared heating works, how it compares with conventional heating, what affects running costs and energy use, and how to design an effective infrared heating system.
Unlike heating systems that depend mainly on convection, infrared heaters emit radiant energy. When this energy reaches people, walls, floors, furniture and other solid surfaces, it is absorbed and converted into heat.
Whether infrared heating is suitable for a home, commercial building or specialist application depends on the building's heat requirement, insulation, room dimensions, ceiling height, intended use and heater positioning. Correct wattage, placement and temperature control are therefore essential when designing an infrared heating system.
Infrared heating uses radiant energy to transfer heat towards people and solid surfaces rather than relying primarily on warming and circulating room air.
Infrared heating is a form of radiant heating powered by electricity. An infrared heater uses electricity to heat an emitting surface, which then releases energy within the infrared part of the electromagnetic spectrum.
This radiant energy travels away from the heater and can be absorbed by people and solid surfaces within its effective coverage. When infrared energy is absorbed, it is converted into thermal energy and increases the temperature of the receiving surface.
Walls, floors, furniture and other materials can therefore warm as they absorb radiant energy and subsequently exchange heat with their surroundings.
This differs from predominantly convection-based heating. Electric radiators, wet radiators, fan heaters and other convection-led systems transfer a greater proportion of their heat to the surrounding air. As that air warms, it circulates through the room.
Understanding the difference between radiant heat and convection is fundamental to understanding how infrared heating works, how it feels and how an infrared heating system should be positioned.
Infrared heaters generate heat at their emitting surface and release electromagnetic radiation within the infrared spectrum. This radiant energy travels through the space until it reaches a person, object or surface capable of absorbing it.
Once absorbed, the radiant energy is converted into thermal energy. People can experience this as direct radiant warmth, while walls, floors, furniture and other surfaces increase in temperature and subsequently exchange heat with the surrounding room.
This means infrared heating does not depend entirely on warming a body of air and circulating it around the room before occupants experience warmth.
Thermal comfort is influenced by more than air temperature alone. The temperature of surrounding surfaces and the radiant energy reaching the body also contribute to how warm or cool a space feels.
With infrared heating, occupants within the effective radiant coverage of a heater can experience radiant warmth directly. This creates a different heating experience from systems that depend more heavily on warming and circulating room air.
Radiant energy travels away from the heater, so positioning has an important effect on where that energy is delivered. Furniture, structural features and other obstructions can affect radiant coverage, which is why selecting a heater based on floor area alone is not enough.
The required heating output also depends on factors including room dimensions, insulation, glazing, ceiling height, external walls and overall building heat loss. Heater output, quantity and positioning should therefore be considered together when designing the system.
For a deeper explanation of infrared wavelengths, radiant heat transfer and far infrared energy, see the science of infrared heating.
Electricity powers the heater and raises the temperature of its emitting surface.
Radiant energy travels from the heater towards people and solid surfaces within its effective field.
Absorbed radiant energy becomes thermal energy, warming occupants and surrounding surfaces.
The main difference between infrared heating and conventional convection-led heating is how thermal energy is delivered into the occupied space.
Radiators, fan heaters and many central heating systems transfer a significant proportion of their heat to the surrounding air. As the air warms it becomes more buoyant and rises, while cooler air moves downwards, creating convection currents that distribute heat around the room.
Temperature stratification can occur during this process, particularly in taller spaces, where warmer air can accumulate at higher level while temperatures nearer floor level remain lower.
Infrared heating places greater emphasis on radiant heat. Energy travels from the heater towards people and solid surfaces within its effective coverage without depending on the intervening air being heated first. When those surfaces absorb the radiant energy, their temperature increases.
This can make infrared particularly useful where radiant coverage, room-by-room zoning, targeted heating or reduced reliance on warm-air circulation is desirable.
Neither heating method eliminates the underlying heat loss of a building. Insulation, glazing, ventilation, draughts, external temperature and the required indoor temperature all continue to influence how much energy is needed to maintain comfortable conditions.
For a detailed comparison of the two approaches, see infrared heating vs traditional heating.
You can also compare infrared heating vs air source heat pumps or explore our broader guide to infrared heating vs other heating options.
Radiant energy travels from the heater towards people and solid surfaces within its effective coverage.
Radiators and many conventional systems transfer a significant proportion of their heat to the surrounding air.
The heating method changes how warmth is delivered, but it does not remove the heat loss of the building. Insulation, glazing, ventilation, draughts and outdoor temperature still influence the heating energy required.
The illustration below shows the basic difference between infrared radiant heating and convection-led heating.
Whichever heating system is used, the amount of heat required ultimately depends on the building, desired indoor temperature and external conditions. Correct system sizing remains essential.
Infrared heaters are electric heating appliances, so their electricity consumption can be calculated directly from their power rating and the amount of time they are actively drawing power.
The potential advantage of infrared heating is not that electricity is converted into heat in a fundamentally different way from other direct electric resistance heaters. Instead, the practical differences lie in how the heat is delivered, where heaters are positioned and how individual rooms or heating zones are controlled.
Radiant heating can be particularly useful where targeted heating or room-by-room zoning is required. Rather than operating an entire property to the same schedule and temperature, individual rooms or areas can be controlled according to occupancy and heating requirements.
Actual electricity consumption depends on factors including:
A simple way to estimate the maximum hourly electricity cost of an infrared heater is to multiply its power consumption in kilowatts by your electricity tariff per kilowatt hour.
For example, an 800 watt heater has a rated power of 0.8 kW. At an electricity price of £0.30 per kWh, continuous operation at full rated power would cost:
0.8 kW × £0.30 per kWh = £0.24 per hour
This represents the electricity cost while the heater is actively drawing its full rated power. A thermostatically controlled heater can switch on and off as required to maintain the selected temperature, so actual consumption over a day or month depends on how frequently heating is required.
Correct sizing, zoning and scheduling can help prevent unnecessary heating, which is why system design and temperature control are important when estimating potential running costs.
For a more detailed explanation, see how much infrared heating costs to run in the UK.
Infrared heating can also operate alongside solar PV, allowing some heating demand to be supplied by electricity generated on site when sufficient solar generation is available. Read more about infrared heating with solar panels.
Convert watts to kilowatts, then multiply by your electricity tariff to calculate the maximum cost for each hour of continuous full-power operation.
System sizing, building heat loss, temperature settings, occupancy and control all influence how frequently heating is required.
A thermostatically controlled heater can cycle on and off as required. Actual consumption depends on how frequently the room calls for heat, which is affected by heat loss, temperature settings, occupancy, weather and system design.
Use our infrared heating calculator to estimate the heating output required based on your room dimensions and building type.
Infrared heating uses non-ionising infrared radiation to transfer thermal energy. Infrared radiation is different from ionising radiation such as X-rays and is also distinct from ultraviolet radiation.
Infrared panels provide radiant heat without requiring a fan to distribute warmth around the room. They therefore do not deliberately create the forced airflow associated with fan heaters and some warm-air heating systems.
As with any electrical heating appliance, infrared heaters must be correctly selected, installed and operated in accordance with the manufacturer's instructions. Required clearances should be maintained and heaters should not be covered or unnecessarily obstructed.
Because infrared energy can warm solid surfaces within its effective coverage, it can increase the surface temperature of walls and other materials. Warmer surfaces may be less susceptible to surface condensation where moisture would otherwise condense onto a colder surface.
However, infrared heating should not be treated as a solution to every damp or mould problem. Water ingress, plumbing leaks, rising damp, inadequate ventilation and other building defects require the underlying cause to be identified and addressed.
Yes, but only heaters suitable for the intended bathroom or wet-area location should be installed. The product's ingress protection rating, electrical supply, mounting position and applicable bathroom electrical zones must all be considered.
Electrical installation should comply with the applicable requirements and should be undertaken by a suitably qualified person where required.
For a more detailed explanation, read is infrared heating safe?
Infrared heaters transfer energy by radiation rather than depending primarily on forced or circulating warm air.
Electric infrared heaters do not burn gas or another fuel at the point of use.
Heater selection, positioning and electrical installation should follow the product instructions and suit the intended application.
Where infrared heating is installed in a bathroom or another location subject to moisture, the product and installation must be suitable for its intended location and the applicable electrical requirements.
Infrared heating can be used across a wide range of domestic, commercial and specialist applications. Its suitability depends on the building, required temperature, occupancy pattern, heat loss and whether effective radiant coverage can be achieved.
It can be particularly useful where independent zoning, targeted radiant warmth, flexible wall or ceiling mounting or heating at occupant level is required. Heater type, output, controls and positioning should be considered for each individual application.
There is no single infrared heater that is ideal for every environment. Panel style, mounting position, wattage, IP rating, controls and required radiant coverage should all be matched to the individual application.
Infrared heating for living rooms, bedrooms, kitchens and other domestic spaces.
Residential heating →Zoned electric heating for offices, studios and working environments.
Commercial heating →Heating options for shops, hospitality spaces, showrooms and commercial interiors.
Commercial heating →Radiant heating options for workshops, warehouses and larger working environments.
Industrial heating →Radiant heating options for churches, heritage buildings and challenging older spaces.
Church heating →Radiant heating can be useful in larger spaces where warm-air stratification can be a consideration.
Explore commercial heating →A bedroom, church, office and warehouse may require different heater types, outputs and positioning. Room dimensions, heat loss, mounting height and intended use should all be considered when sizing and positioning infrared heating.
Infrared heating can be relatively straightforward to install because it does not require a boiler, water-filled radiators or heating pipework. Depending on the product, infrared heaters can be mounted on walls or ceilings and incorporated into both new-build and retrofit projects.
The electrical connection depends on the heater and installation. Some products may be supplied with a plug for connection to an appropriate socket, while others are intended for fixed electrical connection.
Always follow the installation instructions supplied with the heater, including the permitted mounting orientation, minimum clearances, electrical requirements and any location-specific restrictions.
Where fixed wiring or other electrical work is required, the installation must comply with the applicable electrical requirements. Work should be undertaken by a suitably qualified person where required.
Bathrooms require additional consideration because electrical equipment is installed close to water. The heater must have an appropriate ingress protection rating for its intended location and must be installed in accordance with applicable bathroom-zone and electrical requirements.
Heating products placed on the relevant market should meet the applicable product safety and electrical requirements and carry the appropriate conformity marking where required. Product documentation and installation instructions should also be followed.
CE and UKCA markings are conformity markings rather than independent product certifications. They indicate that the manufacturer declares conformity with the applicable requirements for products within the respective regulatory framework.
Professional system-design advice can be particularly valuable for larger properties, commercial projects, high ceilings, unusual room layouts or installations involving multiple heaters and control zones.
Infrared heating works best when the complete system is considered. Heater output, positioning, room zoning and appropriate controls all contribute to how effectively a space is heated.
Enter your room dimensions and building type into our calculator to estimate the infrared heating wattage required.
Good control is an important part of an infrared heating system. Independent room control allows temperatures and heating schedules to be matched more closely to when each space is actually being used.
Effective temperature control is an important part of an infrared heating system. Individual heaters or groups of heaters can be assigned to separate rooms or zones, allowing different areas of a building to operate according to how they are actually used.
A thermostat measures the temperature and controls the heating in response to the selected setpoint. Once the required temperature is reached, the control can stop calling for heat and activate it again when required.
This means a correctly controlled infrared heating system does not necessarily draw its full rated power continuously throughout the day.
Independent zones allow different rooms to operate at different temperatures and schedules. A frequently occupied living room, for example, does not need to follow the same heating schedule as a spare bedroom or home office.
This can be particularly useful in homes and commercial buildings where occupancy varies considerably throughout the day.
Depending on the heater and control system, smart controls can provide features such as programmable heating schedules, remote temperature adjustment and app-based control.
These features can make it easier to match heating operation to occupancy and avoid heating rooms unnecessarily.
Read more about the benefits of installing a smart thermostat.
You can also explore our smart thermostat and heating control range.
Straightforward answers to common questions about infrared heating, running costs, installation, controls and everyday use.
Infrared heaters use non-ionising infrared radiation to provide radiant heat. They should be selected, installed and operated in accordance with the manufacturer's instructions and applicable electrical requirements. Suitable products can be used in residential, commercial and other appropriate environments.
Yes. Infrared heating can be designed as a whole-room heating system when sufficient heating output and appropriate radiant coverage are provided. Correct wattage and positioning are important because the system must provide enough heat to meet the room's heat requirement.
Infrared heating can be used as the primary space-heating system for a property when it is correctly sized and designed. However, it provides space heating rather than domestic hot water, so a separate hot-water system is required where infrared replaces a boiler-based system.
Yes, provided the heater is suitable for the intended location and has the appropriate ingress protection rating. Bathroom electrical zones and installation requirements must also be followed, with electrical work undertaken by a suitably qualified person where required.
Running cost depends on heater wattage, electricity tariff and how long the heater is actively drawing power. For example, an 800 W heater uses 0.8 kWh of electricity if it operates continuously at full rated power for one hour. Thermostat operation, schedules, insulation and room heat loss determine how frequently heating is required in practice.
Not automatically. Both are forms of direct electric heating. Running costs depend on the installed wattage, electricity tariff and how long the heaters operate. Differences in radiant heat delivery, zoning, positioning and temperature control can affect how each system is used and therefore its overall electricity consumption.
Panels should be positioned to provide effective radiant coverage of the area being heated and should not be unnecessarily obstructed. Depending on the heater and room layout, wall or ceiling mounting may be appropriate. Heater output, mounting height, clearances and manufacturer guidance should also be considered.
A properly controlled heating system should use suitable thermostatic control. Depending on the infrared heater, this may be provided by a built-in thermostat or a compatible external room thermostat and control system.
Far infrared is commonly associated with lower-temperature radiant heating applications, including infrared panel heating for indoor spaces. Near infrared heaters operate at considerably higher emitter temperatures and provide more intense directional radiant heat, making them more commonly associated with applications such as outdoor or industrial spot heating.
For a full explanation, see near infrared vs far infrared heating.
Every property is different. Heating requirements depend on factors including room dimensions, insulation, glazing, ceiling height and the way the space is used.
Start with our infrared heating calculator to estimate the wattage required for your room, then explore our heater ranges to choose the right product type for your installation.
