The homes are made using a hybrid heavyweight timber frame prefabricated kit house, using highly cost effective standardised process that has been upgraded to meet the high performance thermal requirements to achieve Zero Carbon and Zero Bills specification. The additional space heating and hot water load will be met by a novel all-electric heating system - powered by the sun. The roof integrated PV system drives a small ‘Air Source Heat Pump’ (ASHP) which heats water for distribution by underfloor heating. This is further optimised by the intelligent integration with a ‘Mechanical Ventilation with Heat Recovery’ unit, or MVHR, ensuring the home has an ample supply of pre-heated fresh air.
Built under factory conditions using modern methods of construction (MMC), on-site waste and inefficiencies are reduced to a minimum. The frame can be delivered to site and erected in a matter of days, ensuring quick construction times. The frame is covered by a minimum 15 year warranty, and can be sourced from a number of timber frame factories around the UK. It is more efficient to control quality standards in a factory production environment than on a building site. Production line methods ensure better control of costs, leading to more cost effective prices for house buyers. The fixed prices for kits avoid the pitfall of cost overruns.
Kits facilitate the onsite build – only 6 to 8 weeks erection time for the shell and core
All Zero Bills Homes embody the following ingredients:
Structure -Low-embodied-energy building structure
Airtight Construction- In order to keep the valuable heat and coolth in, the building should have as little uncontrolled ventilation as possible, particularly during the heating season.
Thermal Mass- Using dense materials in the ceilings and floors reduces fluctuations in temperature from internal heat gains and losses through open windows
ZEDheat-hub™ heating&ventilation system
•A ventilation system with heat recovery
• A micro-heat pump
• A compact hot water cylinder
• Optional coil for a wood stove.
HiminZED ZEDroof - integrated PV panels to generate all net electricity demands on site.
High levels of insulation- Wrapping the thermal mass in high levels of insulation reduces the need for active heating and cooling in a building to an absolute minimum.