Heat source
A correctly selected heat pump can supply the low-temperature water commonly used by hydronic floor circuits.
Hydronic underfloor heating
Low-temperature comfort begins below the finished floor.
Hydronic underfloor heating circulates warm water through pipe loops embedded within the floor construction. The large active surface can distribute heat evenly when the building load, insulation, layout, flow and controls are designed as one system.
GOLD · SYSTEM GUIDE
A water-based heating system, not only a pipe layout.
The floor build-up becomes the heat emitter. Pipe spacing, circuit lengths, water temperature, floor finish and room-by-room demand influence the final layout and operating response.
How the system is coordinated
Distribution
Manifolds divide the system into balanced loops with suitable flow rates and circuit lengths.
Room control
Zoning, thermostats and actuators coordinate room demand without losing sight of minimum flow and heat-source operation.
Hydronic underfloor heating
Integration with a heat pump
Underfloor heating can be a strong match for an air-to-water heat pump because it generally works with lower supply-water temperatures than many traditional emitters. The heat pump, buffer strategy, circulation and controls still need to be selected around the actual project.
Steady water temperature
Weather compensation and suitable controls can adjust supply temperature as outdoor conditions change.
Coordinated circulation
Pump selection, manifold pressure loss and zone operation must maintain the intended flow through active circuits.
Hydronic underfloor heating
Design inputs that shape the floor system
The final design should follow calculated room loads and the actual floor construction rather than a single standard spacing rule.
Building heat load
Room-by-room demand defines the heat output required from each floor area.
Insulation
Building-envelope and below-pipe insulation influence losses, response and required output.
Pipe spacing and layout
Spacing, loop pattern, circuit length and edge zones respond to room demand and geometry.
Floor construction
Screed depth, floor finish and material resistance affect heat transfer and response time.
Supply-water temperature
The design temperature must suit the calculated output, floor limits and selected heat source.
Zoning and controls
Manifolds, actuators, thermostats, sensors and circulation logic coordinate individual areas.
GOLD
Planning a heating or hot-water project?
Share the building type, area and required water temperature. Our team will help identify the right system direction.