What Is Infrared Heating Film and How Does It Work?

Infrared heating film is a thin electric underfloor heating system designed primarily for use beneath compatible floating floors, such as laminate and engineered wood. It uses carbon heating elements to distribute warmth evenly across a large floor area.

Because the system is thin, responsive and does not require pipes or a boiler, it can be particularly useful in renovated homes, apartments, extensions, bedrooms, living rooms and home offices.

In this guide, we explain how infrared heating film works, where it can be installed, what components are required and what should be considered before choosing a system for an Irish property.

What Is Infrared Heating Film?

Infrared heating film is a flexible electric heating material installed beneath a suitable floor covering.

The film contains carbon heating elements positioned between durable layers of insulating material. Copper busbars located along the sides of the film distribute electricity through the carbon heating area.

When the system is switched on, electrical energy is converted into heat. This warmth passes upwards through the floor finish and into the room.

Heating film is normally supplied in rolls or as part of a complete installation kit containing the components required for a specific floor area.

How Does Infrared Heating Film Work?

Electricity flows through the copper busbars and carbon heating elements inside the film. The resistance of the carbon material creates heat across the surface of the film.

Instead of concentrating heat in a single location, the system spreads it over a large section of the floor.

This provides two forms of heat transfer:

• heat passing directly through the floor covering,
• radiant warmth from the heated floor surface into the room.

The system is controlled by a thermostat. Depending on the selected controller, users can set:

• the required room temperature,
• operating hours,
• weekly heating schedules,
• floor-temperature limits,
• separate settings for different rooms.

Each room or heating zone can usually be controlled independently.

What Does the Floor Construction Look Like?

A typical heating film installation beneath a floating laminate floor may include:

1. the structural subfloor,
2. suitable insulation or reflective underlay,
3. infrared heating film,
4. a protective layer where required,
5. compatible laminate or engineered wood flooring.

The exact floor build-up depends on the product, room and chosen floor finish.

The heating film should be installed on a clean, dry and even surface. It should also be protected from mechanical damage during installation.

Always follow the instructions supplied with the heating system and floor covering.

Which Floors Are Suitable for Heating Film?

Heating film is most commonly associated with floating floor finishes.

Suitable applications may include:

• laminate flooring,
• engineered wood flooring,
• selected floating vinyl systems,
• other floor coverings approved for electric underfloor heating.

The flooring manufacturer should clearly confirm that the product is suitable for underfloor heating.

Important factors include:

• maximum permitted floor temperature,
• thermal resistance of the floor covering,
• thickness of the flooring,
• installation method,
• compatibility with the selected heating output.

Traditional heating mats and cables are generally more common beneath tiled floors, where they can be installed within tile adhesive or levelling compound.

Why Is Heating Film Suitable for Renovations?

One of the main advantages of heating film is its low installation height.

Water-based underfloor heating can require pipework, insulation, screed and significant changes to the existing floor. Heating film can often be installed with a much smaller increase in floor level.

This makes it useful for:

• apartment renovations,
• bedroom upgrades,
• home offices,
• attic conversions,
• extensions,
• garden rooms,
• rooms where floor height is limited.

The system does not require radiators, water pipes or a separate boiler. This can also provide more flexibility when planning furniture and room layouts.

What Are the Main Advantages?

Even Heat Distribution

Heating film covers a large section of the usable floor area. As a result, it can distribute warmth more evenly than a single wall-mounted heat source.

Low Installation Height

The thin construction makes it suitable for many renovation projects where the finished floor level cannot be increased significantly.

Individual Room Control

Separate thermostats can be used for different rooms or zones. Users can heat only the areas that are currently required.

No Water Pipes

The system operates electrically and does not require water-based pipework, pumps or a gas boiler.

Fast Response

Heating film can begin transferring warmth through the floor relatively quickly. The response time depends on the insulation, floor covering and room construction.

Compatible with Smart Controls

Many systems can be used with programmable or Wi-Fi thermostats, allowing schedules and temperatures to be adjusted more precisely.

Is Infrared Heating Film Energy Efficient?

Electric heating film converts electricity into heat at the point where it is used. However, the running cost of the system depends primarily on the amount of heat required by the building.

Important factors include:

• insulation levels,
• room dimensions,
• external walls,
• window size and quality,
• air leakage,
• desired room temperature,
• operating schedule,
• electricity tariff,
• available heated floor area.

A well-insulated room will normally require less energy to maintain the same temperature than a poorly insulated room.

For this reason, heating performance should not be judged only by the wattage of the film. The heat loss of the room must also be considered.

Can Heating Film Be the Main Heating System?

Heating film may be capable of acting as the primary heat source in a suitable room, but this should not be assumed without calculation.

A heat-loss assessment should consider:

• room area and volume,
• wall and roof insulation,
• windows and external doors,
• exposed walls,
• ventilation,
• local design temperatures,
• percentage of the floor that can be heated.

The available heating area is especially important.

Heating film should generally not be installed beneath:

• fitted kitchen units,
• permanently fixed wardrobes,
• baths or shower trays,
• heavy furniture without suitable clearance,
• areas where heat could become trapped.

If only a small percentage of the floor can be heated, the system may not provide enough output to cover the room’s heat loss.

Is Heating Film Suitable for Irish Homes?

Infrared heating film can be suitable for Irish homes, particularly where the property has reasonable insulation and an appropriate floor construction.

It may be considered for:

• modern apartments,
• renovated bedrooms,
• living rooms,
• extensions,
• garden rooms,
• home offices,
• energy-efficient new builds.

Older properties with high heat loss may require insulation improvements or an additional heating source.

The suitability of the system should therefore be assessed room by room rather than based only on the total property size.

What Components Are Required?

A complete heating film installation may include:

• infrared heating film,
• suitable insulation underlay,
• electrical connectors,
• connection cables,
• thermostat,
• floor-temperature sensor,
• protective layer,
• installation accessories.

The exact components depend on the selected product and floor construction.

Using a complete kit can make it easier to ensure that the main components are compatible with one another.

What Does the Thermostat Do?

The thermostat controls when the heating film operates.

Basic thermostats allow the user to select a target temperature. More advanced controllers may also provide:

• weekly programmes,
• different settings for weekdays and weekends,
• Wi-Fi control,
• energy-use information,
• open-window detection,
• floor-temperature limits,
• remote control through an application.

A floor sensor is particularly important because it can prevent the floor covering from exceeding its permitted operating temperature.

Heating Film Versus Heating Mats

Heating film and heating mats are both electric underfloor heating systems, but they are normally used with different floor constructions.

The correct option depends mainly on the floor finish and installation method.

Heating film should not be confused with cable-based heating mats. They use different constructions and should be installed according to their own technical instructions.

Is Heating Film Safe?

A correctly selected and installed heating film system is designed to operate at controlled temperatures beneath a compatible floor.

Safe installation depends on:

• using compatible components,
• following the manufacturer’s instructions,
• avoiding damaged film,
• using the correct connectors and insulation,
• installing a suitable thermostat and floor sensor,
• protecting the film during floor installation,
• testing the system before the floor is completed.

Electrical connections and final testing should be carried out by an appropriately qualified electrician.

The heating system should not be switched on until the installation has been inspected and confirmed as complete.

Common Installation Mistakes

Typical problems can arise when:

• heating film is installed beneath fixed furniture,
• the usable heating area is measured incorrectly,
• unsuitable flooring is selected,
• insulation beneath the film is omitted,
• film sections overlap,
• electrical connectors are not properly insulated,
• the floor sensor is positioned incorrectly,
• the system is not tested before covering,
• the maximum floor temperature is not configured.

Careful planning before installation can prevent many of these problems.

How Do You Choose the Correct System?

Before ordering heating film, determine:

1. the total room area,
2. the usable heating area,
3. the type of flooring,
4. the insulation level,
5. the heat loss of the room,
6. the required heating output,
7. the thermostat and control method,
8. whether the system will provide primary or supplementary heating.

Do not calculate the heating area using the full room dimensions if parts of the floor will be covered by permanent furniture or fittings.

A properly planned system should match both the available floor area and the heating requirement of the room.

Frequently Asked Questions

Choose the Right Heating Film System

Infrared heating film can provide discreet and evenly distributed warmth beneath compatible floating floors.

Its thin construction makes it particularly useful for renovations, bedrooms, living spaces, apartments, extensions and home offices.

The most important step is selecting the system according to the room’s heat loss, usable floor area and chosen floor finish.