Frequently Asked Questions

Waterless radiant is radiant floor heating with no water in the floor. Instead of pumping hot water through PEX tubing (hydronic radiant), an air-source heat pump moves refrigerant directly through anti-corrosion copper tubing embedded in the slab — the floor itself becomes the radiator. It is not electric-resistance floor heating (cheap to install, expensive to run) and it is not a tankless water heater. It delivers the even, draft-free comfort of radiant heat, at air-source heat-pump efficiency, with no water loop.

Yes — that is exactly what HT is. The air-source heat pump's refrigerant expands directly inside copper capillary tubing in the floor (a refrigerant-direct, or direct-expansion/DX, approach) rather than heating water that then circulates. Removing the water loop eliminates the circulator pumps, glycol, buffer tank, and second heat-exchange step of a hydronic system.

HT both heats and cools on one refrigerant system. In winter the floor radiates heat; in summer the same outdoor unit drives cooling through indoor air handlers (fan coils). Cooling is delivered by the air handlers — not by chilling the floor — which is the right way to manage summer humidity and avoids any below-dew-point floor-condensation problem that pure radiant cooling can cause.

No — there is no water in the floor to freeze or leak. Hydronic systems can freeze-burst in a vacant or power-out home and can leak inside a finished slab (an expensive, hard-to-locate repair). Because HT's in-floor tubing carries refrigerant, not water, there is nothing to freeze, nothing to flood the slab, and no antifreeze to maintain.

Both give radiant-floor comfort. Hydronic is long-established but carries the water loop's baggage: pumps, glycol, buffer tank, scale, freeze risk, and in-slab leak liability. Waterless radiant removes all of that, responds faster, fits a thinner 1–2 inches build-up, and adds cooling on the same system. The main difference: waterless radiant is a refrigerant system, installed by HVAC/refrigerant technicians rather than hydronic plumbers — see our installer program.

An air-to-water air-source heat pump is still hydronic at the floor: it heats water and circulates it through PEX, so you keep the pumps, buffer tank, glycol, and leak/freeze exposure. HT is refrigerant-direct — the air-source heat pump's refrigerant goes straight into the floor with no water loop at all. Same air-source heat-pump efficiency and the same heat-and-cool capability, without the water side.

No. A mini-split blows conditioned air from a wall head; HT is refrigerant-direct radiant — the air-source heat pump's refrigerant runs through copper tubing in your floor, so the floor radiates heat. It's a different category, built on patent-protected anti-corrosion copper-capillary technology, and it adds whole-floor radiant comfort (and summer cooling via discreet air handlers) that a wall unit can't deliver.

HT is installed by certified local partners using standard refrigerant line-set tooling and procedures. We're building a North American partner network specifically so there's a trained installer and locally-stocked common parts behind every system, with a defined service response — not an orphaned product nobody will touch.

Transparent and no-gotcha: clear parts-and-labor coverage when the system is installed by a certified HT installer, with the anti-corrosion copper network built to outlast the floor. Full terms are part of your proposal — no fine-print surprises.

Very — that's a strength here. The old 'radiant is slow' reputation comes from thick, high-mass hydronic slabs. HT is refrigerant-direct and uses a low-mass 1–2 inches build-up, so the floor responds faster than a poured hydronic slab. We confirm response expectations for your specific build-up during design.

It's engineered for cold climates: enhanced-vapor-injection and supercooling hold capacity as it gets cold, with a rated envelope to -13 °F and 0-derate heating to 5 °F. As with any air-source heat pump, design for your climate and load matters — we size the system and advise on whether supplemental backup makes sense for your coldest design days. (Published figures are system ratings; we verify for your project.)

Yes — it's an inverter air-source heat pump (rated heating COP up to 4.6), so it delivers several units of heat per unit of electricity, fundamentally unlike electric-resistance radiant. Actual cost depends on your electricity rate, climate, insulation, and zoning; we can model expected consumption for your project.

The in-floor tubing is a sealed, anti-corrosion copper capillary network, assembled weld-free for long-term air-tightness and fully embedded in the slab — the same copper-refrigerant approach used throughout modern HVAC, applied to the floor. System charge and line routing are engineered to code and to the refrigerant manufacturer's limits. We're glad to walk a specifier or AHJ through the design.

HT is purpose-built for whole-home comfort done once: new construction and gut/whole-floor renovations, high-end custom homes and luxury developments, all-electric and gas-ban projects, and cold-climate sites that want even, quiet, all-season comfort. It's also the way for HVAC contractors and builders to move upmarket with a product competitors can't match. For a single existing bathroom or a quick add-on, a basic electric mat may be all you need — HT is for when you want the whole home done right.

HT is actively building its partner network. Partners get free local promotion through our content/search engine, commission on referred leads, and full buildout support — product and install training, system design help, one-stop kits, and a path to your own dealership — so you can move upmarket with a product no competitor can offer. Reach out through our contact page to start.

No. Waterless Radiant puts refrigerant — not water — through the embedded copper floor loops. There is no boiler, buffer tank, manifold, circulating pump, or glycol antifreeze in the floor heating loop. That means the floor heating loop has no water to leak, scale up, or freeze and burst, which is a major advantage in cold climates and water-sensitive (e.g. wood-framed) homes. We don't claim the system is risk-free, but it removes the specific water-loop leak, scaling, and pipe-freeze risks that traditional hydronic radiant floors carry. The copper loop network is corrosion-resistant, pressure-tested, and gas-tightness verified before the floor is closed.

A mini-split or ducted air-source heat pump heats and cools by blowing conditioned air into the room — you feel air movement, hear fan noise, and see wall units or vents. Waterless Radiant uses the same air-source heat-pump efficiency but delivers heat as invisible, draft-free radiant warmth from the floor itself, because refrigerant flows directly through copper loops embedded in the floor. There are no wall heads for heating and no forced-air drafts. When cooling is included, it is provided by quiet, slim indoor air handlers. So you get air-source heat-pump efficiency with radiant-floor comfort — not forced-air comfort.

Yes, in the two-in-one configuration. Heating is delivered through the radiant floor; cooling is delivered by matched indoor air handlers (fan coils), not through the floor. We deliberately do not cool through the floor surface, because chilling a floor can cause condensation (dew). Using air handlers for cooling avoids that risk and provides proper humidity and sensible-cooling control. A triple-function configuration can additionally provide domestic hot water. So a single air-source heat-pump platform can heat (radiant floor), cool (air handlers), and optionally make hot water.

Almost never. Refrigerant leaks are extremely rare, and the loops are corrosion-resistant copper, pressure-tested before the floor is closed. If a problem does occur, technicians use an electronic refrigerant detector to find the area, an infrared detector to pinpoint the exact spot, and nitrogen pressure-hold testing to confirm. Repair is then a small, localized 'minimally invasive' opening at that point — unlike traditional water-based radiant repairs, which can require breaking up large floor areas. Systems can also be designed so each loop has an isolation valve, letting one room's loop be shut off and serviced without affecting the rest of the home.

Because refrigerant heats the floor directly instead of going through a water loop, a direct-expansion radiant floor responds and warms faster than an equivalent water-based radiant system — manufacturer field comparisons describe a substantially quicker warm-up. The floor provides even, gentle radiant warmth across the room with a small temperature gradient, and the control system modulates capacity continuously to hold room temperature very stable and avoid the on/off swings of simpler systems. The result is steady, draft-free comfort rather than the rise-and-fall feel of forced-air heat.

Waterless Radiant is air-source heat-pump driven, so it moves heat rather than burning fuel or using resistance elements, giving it a strong efficiency advantage over electric resistance floor heating. By removing the secondary water heat exchanger and circulating pump used in hydronic systems, the direct-expansion path also avoids those losses. In manufacturer field comparisons, the direct-refrigerant approach showed meaningfully higher whole-system efficiency than the equivalent water-based air-source heat-pump radiant system. Actual operating cost depends on climate, building envelope, system sizing, and local electricity rates. (Specific efficiency ratings for the U.S. market are being validated to U.S. test standards.)

Yes. The system can run as a single whole-home temperature or as independent per-room zones. Per-room zoning uses a zone-control valve box with electronic expansion valves that meter refrigerant to each floor loop, plus a thermostat per zone. A smartphone app lets you turn the system on and off remotely, adjust temperatures, and monitor energy use. This gives you room-by-room comfort and the ability to set back unused areas to save energy.

U.S. systems are planned around modern low-GWP refrigerant (A2L-class, such as R-32), in line with current U.S. environmental rules that phase out high-GWP refrigerants. A2L refrigerants are only mildly flammable and are now the industry standard for new air-source heat pumps. Because tubing runs inside the building, the system is engineered around refrigerant charge limits, room-volume considerations, and leak detection appropriate to embedded piping, with corrosion-resistant copper and verified leak-tight joints. (U.S. listing and code-acceptance work for embedded refrigerant piping is in progress; specific charge and safety documentation is part of the U.S. installation package.)