New technologies are helping an environmental construction company create a zero carbon home that it claims will use less than 2kW of energy.<br> <br> Greenway Developments' cost-competitive concept, which, it is estimated, will use just 1.7kW of energy to heat efficiently, is already being met with a positive reaction from social housing providers in particular, the company says. Key elements in reducing energy consumption in the home once occupied are insulated concrete form (ICF) bricks, rainwater harvesting, photovoltaic tiles, and Passivent's new GenAiration intelligent mechanical ventilation with heat recovery (MVHR). The latter also has a positive impact on construction techniques and time, claims Passivent, as GenAiration has utilised Passivent's RD75 small bore ducting. Due to its flexible construction this can be fitted round corners without the need for additional joints.<br> <br> Frank Hesketh, Greenway Developments' sales and marketing director, says: "Passivent's GenAiration will make a significant impact to both housing provider and occupier. It is quicker and easier to install than conventional MVHR systems, and once installed is completely automatic, which takes operation away from the tenant."