Data and Information from Newton Hall.
Incorporated into the property is:
Underfloor Heating throughout
4 x Air Source Heatpumps
Solar Thermal Panels
Calculations and monitoring are showing heating bills down from £2000pcm (oil) to £350, with heating set at a constant 21 degrees. – Property Size: 900 sq.m
Newton Hall was a complex system as it is a listed building with ornate plaster work, original sash windows and shutters along with detailed skirting board, dado rails and picture frames.
Due to the existing features which were retained we could not insulate the walls or fit new timber windows.
What we did was design a system knowing we had a very poor thermal properties through windows, doors and walls. We over insulated the lofts and installed underfloor heating on top of a very thin insulation system.
By laying 7.5km (over 5 miles!) of pipe we put more heat into the property knowing we would be losing it through the walls.
The careful design process allows the house to be run at 21 degrees 24 hours of the day with a running cost of £350 per month.
In brief a listed building with no wall or window insulation at over 9000 sq.ft in an exposed location in Northumberland is costing £350 per month, once the RHI grant is taken into account this mansion house will cost the same as a standard 4 bedroom detached house to heat.