Christchurch Street, SW3
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Christchurch Street: the Greentec System
Heating: An 8kW Danfoss Ground Source Heat Pump will provide hot water to all sinks, baths and showers, as well as the Under Floor Heating. In cold weather, incoming air is first warmed by the Ground to Air Heat Exchanger, then by the Heat Recovery Ventilation system, both of which cost absolutely nothing to run.
Ventilation: The ventilation system extracts stale air from wet areas – kitchens and bathrooms; it is replaced by fresh, filtered air fed into the living areas. The air in the house is completely changed every two hours, creating a very pleasant environment which is often beneficial to asthma and hay fever sufferers.
Cooling: As the outside temperature rises, the Ground to AIr Heat Exchanger begins to cool the incoming air; then the GreenTec System turns off the Heat Recovery Ventilation and the Under Floor Heating . If the temperature in the house continues to rise, the system begins to circulate the cold fluid output from the Heat Pump through the ventilation heat exchanger (Comfort Cooling) to cool incoming air and maintain a comfortable internal temperature. Those rooms which are subject to high solar gain through their windows will be further cooled when required by our Passive Air Conditioning - the approximate maximum cost of keeping the whole house cool in the hottest weather is just 1p per hour.
Environment: This home will use 60-80% less energy than a conventionally-powered property, and there will be no local CO2 emissions. The amount of CO2 given off producing the electricity to power the Heat Pump is less than half of what would be produced by a modern condensing gas boiler, and approximately one quarter of what would be produced by an oil-fired boiler.
Christchurch Street will be a brilliantly modern, spacious home with a supremely comfortable, healthy living environment within a minimal carbon footprint, and with very low running costs - a definite pointer to the way forward for housing redevelopment.