With hydronic floor heating systems water is heated in a boiler and circulated at safe low pressure at around 35 – 40C through extremely durable plastic pipes laid in or under the floor.
For floor heating, the heat source is connected to one or more manifolds, with one manifold per floor level for a typical house. Each manifold can have a number of floor heating circuits.
Alternatively, radiator panels can be used in cases where floor heating is not an option. Although they are called ‘radiators’, they provide predominantly convective heat with some radiant heat. In general, radiant systems like floor heating are more efficient, particularly with higher ceilings, and they provide more comfort for the occupants.
Diffusion Plates (Insulation)
The Diffusion Plate System accommodates 16mm heating pipes and uses 0.8mm thick aluminium plates to diffuse the heat over the floor area. The heat is then transferred through the floor surface into the room. Due to the high conductivity of the plates the reaction time compared to traditional screed systems is reduced.
This system has been designed for timber joist floors or battened timber floors over concrete slab applications with hydronic floor heating systems. Insulation is required under a suspended timber floor application and is recommended when installed over a concrete floor.
Size: 1.0m x 0.338m in 0.8 thick Aluminium with 200mm 2-channel pipe spacing. Conductivity 160W/mK.
Maximum thickness of wood surface over the diffusion plate: 20 mm.
Danfoss Return Temperature Limiter FJVR Valve bodies
TWA Standard Actuator Valves
The thermal actuator TWA range is used with electrical on/off-controls to activate several types of valves and floor heating manifolds. The actuator is equipped with a visual position indicator to show the open or closed position of the valve. The TWA-actuator can be connected to the RA, RAVL and RAV valves from Danfoss. Furthermore versions for valves with M30x1.5 connection are available. The actuator is made for either 24 V (SELV) or 230 V supply in both normally closed (NC) or normally open (NO) versions (valve positions with no supply voltage to the actuator). The 24 V actuator for RA valves also comes in a NC/S-version having an end-switch.
Danfoss FHM-C Mixing Shunts
The pre-fabricated floor heating mixing shunts are used for regulating the correct flow and supply temperature into the hydronic floor heating system. Compact mixing shunts for regulating flow and supply temperatures in floor heating systems. Their compact and flexible design allows the shunt to be mounted on either side of the manifold. A self-acting proportional regulator is used to regulate the supply temperature to ensure it is always constant and at the required temperature.
- Thermometer 0-60ºC Ø35mm
- FHM-C6 Compact Shunt w/ pump UPS 15-60
- FHM-C8 Compact Shunt w/ pump A2 15-60
- FH-ST 55ºC Safety Thermostat
- FH-TC Temperature Controller
- FHM-FL Flow Limiter
- FHM-MS Measurement Set
- FHM-AF Angle Fittings
Danfoss FHF Manifold Accessories
Continuous brass manifolds used for controlling water flow in Hydronic floor heating systems. The supply side manifold comes with or without flowmeters. The return side manifold is equipped with integrated Danfoss pre- setting valves for easy balancing.
A range of high quality accessories for FHF Manifolds including:
- RA TWA NC/220V Actuator
- End Piece with Automatic Airvent
- End Piece with Manual Airvent
- End Caps (2 pcs)
- Connection Pieces (2pcs)
- Reducing Bushes (2pcs)
- Mounting Brackets (2pcs)
- Ball Valve Set (2pcs)
- Manifold Frame
The Danfoss floor heating manifolds are used for heat regulation in floor heating systems. Both flow and return manifold have 1” connections, with connections for between 2 to 12 heating circuits. The manifold is equipped with Danfoss’ integrated valves with pre-setting for easy installation and commissioning. The valves are controlled by Danfoss’ TWA thermal actuators. A full programme of manifold accessories, including brackets, end sections with drain taps and automatic air vents, ball valves, thermometer and reduction pieces, is available.