Cost house ground floor

Cost house: Ground floor

Condensing boiler

A new high efficiency, Valliant Eco Tech Plus 618 Condensing Boiler (965KB) was installed. The boiler is SEDBUK ‘A’ rated and operates at an efficiency of 91.2%. Condensing boilers work on the principle of recovering waste heat which is normally rejected into the atmosphere from the flue of a conventional boiler, and using the recovered heat energy to pre-heat return water. A new central heating system was fitted, with a programmer, room thermostats and thermostatic radiator valves (TRVs).

Floor insulation

Sempafloor insulation 4.5mm thick was used as a thermal barrier to help prevent heat loss and condensation. It was laid over the solid concrete floors and lapped against the Celotex 100mm insulation board and taped so as to reduce thermal bridging at the junction between the two insulation types.

Voltage Optimiser

A VPhase voltage optimiser (2,207KB) has been installed to the incoming mains electricity supply to both properties, this takes the current and optimises it to make it more efficient for the appliances and fittings within the properties. The UK electricity distribution network operates at a nominal 230V, although in practice average voltages are more likely to range between 240V and 245V. The VPhase unit manages voltage to a stable level, normally 220V in the UK, regardless of the incoming supply voltage. The amount of energy saved is device specific, for example: testing by VPhase on fridges and freezers shows 17%, 15% on normal lamps and 10% on energy saving lamps. One digital cordless phone showed an extraordinary saving of 44%. Savings will vary depending on incoming voltage and individual devices.

FSC timber

All new timber is Forest Stewardship Council (FSC) certified. The FSC global forest certification system enables consumers to purchase wood and timber products in the knowledge that they have been sourced from well managed forests and that their products are not contributing to deforestation.

Low VOC emulsion and gloss Ceilings, walls and internal joinery have been painted with emulsion and gloss that has significantly lower amounts of Volatile organic compounds (VOCs). VOCs are emitted gases from solids or liquids, some of which can have adverse health effects. The emulsion and gloss is from the Dulux Ecosense range.