Shillinglee, Surrey
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Heating: 18 square metres of evacuated tube solar panels keep 16 Heat Storage Cells and 1,400ltr of hot water storage topped up.The tanks and cells supply domestic hot water, the Under Floor Heating system and heat the pool air. A 40kW Ground Source Heat Pump is powered by more than 2km of ground loop buried 1.2M below the ground surface; the Heat Pump runs at night if the storage needs topping up, and for a burst during the day to heat the pool water.
Ventilation: The heat recovery system extracts stale air from wet areas – kitchens, bathrooms and the gymnasium – and replaces it with fresh, filtered air fed into the living areas. In colder weather, the incoming air is warmed by heat recovered from the outgoing stale air (Heat Recovery Ventilation), further adding to energy efficiency.
Cooling: As the outside temperature rises, the GreenTec System will initially turn off the Under Floor Heating and the Heat Recovery Ventilation. If the temperature in the house continues to rise, the system will direct cold Ground Loop fluid to cool incoming air; an extension of the same system air-conditions the gymnasium and cinema.
Environment: Shillinglee's heating and ventilation system annually produces much less than half the amount of CO2 - none of it locally – than it would if it were powered by a conventional gas boiler. And the high proportion of solar heat harvested means that the amount saved annually on heating rises year on year - one very effective investment in renewable technologies that will pay for itself many times over and add value to the home.