The 2026 Far Infrared Specifier's Read.

Mechanism · Long-wave radiant heat warms people, floors, walls and internal surfaces directly. Installed beneath floors or within ceiling structures with smart thermostats and room-by-room zoning.

Install · Low disruption. No boiler, no water pipework, no manifold, no cylinder, no wet commissioning.

Running · Designed around heat-loss calculation, zoning, fabric and occupancy. PTC self-regulation and per-room control help reduce wasted energy.

Best fit · Retrofit, listed buildings, new build, modular construction, garden rooms, apartments, social housing, PV-paired homes, hospitality.

Mechanism · Heated water through floor loops from a boiler or heat pump. Heats the slab, then the air.

Install · Screed, manifolds, zoning, commissioning. Best designed in at new-build or full refurbishment.

Running · Highly efficient at steady state once the slab is up to temperature; slow to respond to change.

Best fit · New build, full refurbishment, large open-plan ground floors with consistent occupancy.

Mechanism · Resistance wire mats under tile or stone, heating the floor surface.

Install · Moderate — typically during floor renovation; thin-bed above screed.

Running · Performance depends heavily on insulation, floor covering and control strategy.

Best fit · Bathrooms, kitchens, en-suites; comfort layer rather than primary whole-house heat source.

Mechanism · Low-voltage carbon or graphene elements stepped through transformers, in flooring, walls or ceilings.

Install · Higher — transformer placement, low-voltage distribution and specialist commissioning.

Running · Efficient at the element; whole-system efficiency depends on transformer load and zoning.

Best fit · Premium new-build and specified projects with budget for an integrated low-voltage architecture.

Mechanism · Extract heat from outside air, upgrade via compressor, distribute via radiators or wet underfloor.

Install · External unit, cylinder, often radiator upgrades. Grant-supported via BUS.

Running · Low per kWh delivered at typical COP 3–4; performance falls in very cold weather and in poorly insulated stock.

Best fit · Well-insulated whole-house heating with existing wet distribution, or where the fabric upgrade plan supports a heat-pump-led design.

Mechanism · Burn gas to heat water, distribute via radiators.

Install · Established — new gas connections being phased back on UK new-build from 2025–2026.

Running · Exposed to wholesale gas pricing and the 1 July 2026 cap revision.

Best fit · Existing stock with gas infrastructure; transitional rather than future-aligned.

Modular, volumetric and panelised MMC depends on dry, lightweight, low-tolerance, repeatable components. Infrared film can be designed into floor and ceiling cassettes, pre-wired at factory stage and paired with smart thermostats before site assembly — no boiler, no manifold, no screed, no wet commissioning.

Wet architectures add weeks of trade sequencing — first-fix pipework, screed cure, second-fix manifold, pressure test, commissioning. Far infrared collapses that to first-fix wiring and final cassette close-up. Fewer trades through the bay, faster takt time, heating commissioned before the module leaves the yard.

Modular, SIPs, CLT and light-gauge steel are weight-sensitive. Wet underfloor adds 60–120 kg/m² of screed; transformer-based systems add low-voltage distribution and copper. Far infrared film is low-mass and loads onto standard 230V circuits already present in any modular design.

The far infrared sector grew up serving retrofit because that is where the early specification freedom existed. MMC and offsite specifiers default to what their wet-system supply chain already offers. The fit is excellent — the conversation upstream of the factory simply has not caught up. That gap is the commercial opportunity.

The most mature far infrared markets in the world. Long-standing certified product base (TÜV / VDE), well-developed installer networks, infrared accepted in Passivhaus specifications and listed-building renovations.

Strong adoption in well-insulated, PV-equipped homes and seasonal-use property. Pairs naturally with the renewable-heavy grid.

High-growth retrofit market. Period properties, holiday homes and hospitality with intermittent occupancy are an excellent fit for on-demand radiant heat. iHelios is positioned for this corridor.

Emerging mainstream. Driven by retrofit pressure, listed-building constraints, the gas boiler phase-down, and the economics of pairing infrared with rooftop solar.

Smaller installed base, dominated by ducted forced-air culture; growth in cabin, ADU, off-grid and luxury wellness applications. Long-term headroom is significant.

Japan and Korea have a long radiant-heat culture (kotatsu, ondol heritage). Gulf and luxury hospitality use infrared for outdoor and terrace zones year-round.

iHelios sells design and specification, not just heating film by the metre. The Specifier-First approach — "we design and specify" — is the structural difference from box-shifters, panel-only suppliers and online resellers.

Genuinely friendly to period property, listed stock, hospitality and PV-paired homes — segments where wet underfloor and heat pumps can struggle on cost, disruption or planning consent.

Installed cost is typically a fraction of a heat pump or new wet underfloor system. No boiler, no cylinder, no manifold, no commissioning week. Standard electrical works.

As an electric radiant load, far infrared pairs naturally with PV, battery storage and smart energy control. Heat demand can be scheduled around generation, tariffs and per-room occupancy.

Many specifiers still equate far infrared with cheap electric panel heaters. Education and side-by-side comparison are required at every quote. This document is part of closing that gap.

Sometimes assumed to be "top-up only". With correct specification it is a primary heat source — but the burden of proof sits with the specifier on every project.

UK BUS grants remain heat-pump-weighted. Far infrared currently competes on raw economics rather than subsidy — a long-term strength, a short-term friction.

iHelios is high-craft and low-noise. In a category where loud competitors are winning attention, controlled visibility — through documents like this — is the route to specifier trust without lowering the tone of the brand.