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 you can install it, which components you need and what to consider before you choose 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.

Specifically, the film contains carbon heating elements positioned between durable layers of insulating material. In addition, copper busbars located along the sides of the film distribute electricity through the carbon heating area.

When you switch the system on, it converts electrical energy into heat. Then this warmth passes upwards through the floor finish and into the room.

Heating film normally comes in rolls or as part of a complete installation kit that contains the components for a specific floor area.

How Does Infrared Heating Film Work?

Firstly, electricity flows through the copper busbars and carbon heating elements inside the film. The resistance of the carbon material then 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.

A thermostat controls the system. 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.

As a result, you can usually control each room or heating zone 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.

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

Install the heating film on a clean, dry and even surface. Also protect it from mechanical damage during installation.

In addition, follow the instructions supplied with the heating system and floor covering.

Which Floors Are Suitable for Heating Film?

Generally, heating film suits floating floor finishes best.

Suitable applications may include:

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

Therefore, 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 installers can embed them in tile adhesive or levelling compound.

Why Is Heating Film Suitable for Renovations?

Overall, one of the main advantages of heating film is its low installation height.

For example, water-based underfloor heating can require pipework, insulation, screed and significant changes to the existing floor. With heating film, however, the floor level often rises much less.

This makes it useful for:

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

In addition, 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 you cannot raise the finished floor level significantly.

Individual Room Control

Also, you can use separate thermostats for different rooms or zones. Users can heat only the areas they currently need.

No Water Pipes

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

Fast Response

In fact, heating film can begin transferring warmth through the floor relatively quickly. However, the response time depends on the insulation, floor covering and room construction.

Compatible with Smart Controls

Many systems work with programmable or Wi-Fi thermostats, so you can adjust schedules and temperatures more precisely.

Is Infrared Heating Film Energy Efficient?

Electric heating film converts electricity into heat right where you use it. 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, do not judge heating performance only by the wattage of the film. You must also consider the heat loss of the room. Our dedicated guide explains how to choose the right infrared heating film output from heat loss and usable floor area.

Can Heating Film Be the Main Heating System?

Heating film may act as the primary heat source in a suitable room, but do not assume this 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,
• the percentage of the floor you can heat.

The available heating area is especially important.

Generally, do not install heating film beneath:

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

If you can heat only a small percentage of the floor, 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 suit:

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

However, older properties with high heat loss may require insulation improvements or an additional heating source.

Therefore, assess the suitability of the system room by room rather than by total property size.

Which Components Do You Need?

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.

Note that 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 normally suit different floor constructions.

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

Also, do not confuse heating film with cable-based heating mats. They use different constructions, so follow each product’s own technical instructions.

Is Heating Film Safe?

In general, a correctly selected and installed heating film system operates 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 you complete the floor.

A qualified electrician, for example a Safe Electric registered contractor, should carry out the electrical connections and final testing.

Do not switch the heating system on until someone has inspected the installation and confirmed it as complete.

Common Installation Mistakes

Typical problems include:

• installing heating film beneath fixed furniture,
• measuring the usable heating area incorrectly,
• selecting unsuitable flooring,
• omitting the insulation beneath the film,
• letting film sections overlap,
• leaving electrical connectors without proper insulation,
• positioning the floor sensor incorrectly,
• not testing the system before covering,
• not configuring the maximum floor temperature.

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 from the full room dimensions if permanent furniture or fittings will cover parts of the floor.

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.