Performance house first floor
Performance house: First Floor
Lighting All existing traditional, incandescent lamps were replaced with 12W compact Phillips Light Emitting Diodes (LED) lamps throughout. The LED lamps have a life expectancy of 25, 000 hours compared with a 1000 hour life expectancy of a traditional 60W incandescent lamp or a 10,000 hour life expectancy of a compact fluorescent lamp (CFL). The 12W LED lamps also have an output similar to that of a 60W incandescent lamp thus giving an 80% energy saving.
Rain Water Harvesting Tank A rain water harvesting tank (270KB) that collects rain water run-off from the roof has been installed. This water is collected and used to flush the toilets within the properties.
Rainwater is collected from the slate roofs and stored in an external plastic container. A filter is located in the rainwater pipe adjacent the connection to the store. This catches leaves etc, and also acts as an overflow. This filter is designed to be self-cleaning (with debris being washed down the overflow) but will require routine inspection. A stainless steel pump takes rainwater from a lower connection on the store and pumps it up to a loft mounted rainwater header tank. Automatic controls within the pump automatically sense a drop in water pressure in the pump discharge line when the float valve in the header tank drops, thus starting the pump. These controls also stop the pump when the float valve shuts and pressure rises, or if the rainwater runs out and there is no flow. The rainwater header tank has 2 no. float valves – the first is connected to the boosted rainwater supply as above. The second is connected to the cold water mains supply, such that if there is a lack of stored rainwater and the level in the tank drops below about halfway, mains cold water will be supplied instead. Soakaway A soakaway has been installed to discharge any overflow from the rainwater harvesting tank and the green roof. The rain water run-off from the green roof cannot be sent into the rain water harvesting tank, as this would cause discolouration to the water which is to be used to flush the toilets. As the surface water from the green roof and RWH tank overflow are being sent to the soakaway, no surface water drainage is discharged into the local drainage system. The soakaway consists of a 2.5m3 pit filled with Polystorm crates that hold the shape of the pit, these are wrapped in a geotextile membrane and surrounded with 100mm of pea shingle. This is then backfilled and compacted.