When we told our family and friends we were building our new house in North East Scotland with no central heating, everybody thought we were mad. Moray is known for its pleasant climate but we still get our fair share of snow and sub-zero winters.
As I’m Galbraith’s engineer specialising in construction and renewable energy, most assumed we had replaced traditional central heating with some novel heating gizmo. We hadn’t. We had instead appointed a very clever architect specialising in low- and zero-energy houses that don’t compromise on comfort and make the most of the light and views.
Kirsty Maguire Architect Ltd is an award winning practice based in Dundee, promoting a “Fabric First” approach to building design. Rather than specifying expensive heating technology, by concentrating on the detailing and insulation of the building itself, the heating requirement can be significantly reduced to approaching zero.
Any of the tiny remaining energy demand to keep the lights and Wi-Fi on can be supplied by small-scale renewables or more traditional means.
The low-energy community in Scotland is small but very friendly. Our research took us form Ayr to Ardgay and the message was clear that such construction in Scotland was not only possible, but that everybody should be doing it.
Getting the details right took time but it was worth it. The house was no more expensive to construct than a traditional house, nor did it take any longer. As soon as the insulation was installed (more than 300mm in the walls and roof) the tradesmen worked in t-shirts – this was in January and long before the electricity was connected.
Four years on, the house is still a joy to live in. A very small wood-burning stove provides hot water during the winter, while simple solar panels provide it during the summer.
The household appliances and people generate the vast majority of the heating with the stove on for only one or two hours during the coldest of days. The house maintains a constant 19 to 21˚C all year with a gentle trickle of fresh air constantly provided by a small fan under the stairs. We can also open the windows to hear the birds sing or speak to the kids outside.
With heating accounting for more than 80% of an average household’s energy consumption, it makes sense to give this serious thought during the design process. Three-quarters of that heating requirement is space heating, so reducing this to near zero represents a significant monthly saving. The remaining heat demand is for water, so gaining around six months free of charge reduces any bills considerably. Our total energy consumption is less than £75 a month. And as well as energy savings, the comfort of a house like this is fabulous.
We would recommend that anybody undertaking a new property development gives serious consideration to the low-energy route. In these days of escalating utility bills, total cost of ownership should be factored in right through the design process. Like those before us, once you’ve lived in a low-energy house you can’t help but ask – why isn’t everybody doing it?