Windsor House is a bespoke luxury property in Virginia Water, Surrey. AH Lyons, the housebuilder behind the project, specialise in high-specification homes with a quality finish, typically building one large property a year. Windsor House is a luxury mansion of approximately 793m2, consisting of 6 en-suite bedrooms, 6 receptions rooms, a triple garage and an outdoor pool.
Windsor House required a highly efficient and reliable renewable heating system. The solution Nu-Heat provided had to include boiler back-up, covering the property’s heat load in the unlikely event that the air source heat pump should fail.
The Nu-Heat solution
We worked with AH Lyons to design a bespoke, efficient heating system that included a single Hitachi split ASHP with UFH. Boiler back-up was also carefully integrated with the ASHP, providing an added benefit should the ASHP ever be out of operation.
Products
Hitachi Yutaki split 16kW ASHP
This split ASHP produces a high heat load from a single unit, avoiding the need for more than one heat pump in larger properties, and is simple to install.
- Key components and electrical controls built into indoor unit to simplify installation
- Can be connected to a boiler to cover a higher heat load
- Compatible with KNX home automation
- Inverter controlled compressor to closer match the heating demand
- Split system allows smaller diameter pipework to be installed up to 30m between indoor and outdoor unit
SC14 – screed
This screed floor construction is used frequently in new-build projects. Simple to install, the 14mm UFH tube is simply clipped into standard insulation before the screed is poured.
- Flexible 14mm tube is easy to install around numerous turns in design
- Use of multiple coils within zones means the tubing is installed at closer centres, suitable for low temperature heat sources such as an ASHP
Heat output – performance with ASHP
Water temp produced by ASHP | Natural stone/tiles | 14mm engineered board | 2 tog carpet/underlay |
35°C flow | 29 W/m2 | 26 W/m2 | 20 W/m2 |
40°C flow | 45 W/m2 | 40 W/m2 | 31 W/m2 |
SL20 – screed
Also installed in Windsor House, SL20 is another screed solution ideally suited to large open plan areas. This floor construction uses 20mm tube.
- The longer coil length offers a simplified installation
- Larger floor areas can be covered with each coil, reducing any clustering of tube at the manifold
- Good heat outputs, slightly higher than SC14
Heat output – performance with ASHP
Water temp produced by ASHP | Tiles with decoupling mat | 14mm engineered board | 2 tog carpet/underlay |
35°C flow | 40 W/m2 | 31 W/m2 | 26 W/m2 |
40°C flow | 61 W/m2 | 47 W/m2 | 39 W/m2 |
All images © AH Lyons