We have known for a long time that building with Logix was an easy route to low energy bills, and here is the proof.

Roger Yeoman, build Cedar House in 2014 using Passive house principles to inspire the design. The building faces south, and uses Logix XRV6-8 blocks for the external walls, and "Isoquick" foundations to give a U value of 0.11 and Passive house levels of air-tightness without the need for expensive membranes. The house has no traditional heating system, no wood burners, or gas supply. It relies on Passive solar gain, and electric under floor heating. When I say it uses electric UFH, that's not strictly true. In the 4 years since he moved in the UFH has not been used, until the "Beast from the east" arrived, as Roger explains,

"The "Beast from the East" defeated our eco house, four years after completing the house we turned the heating on for the first time this morning! Four days of freezing temperatures and no solar gain yesterday saw our temperature drop to 19 this morning underfloor electric heating been on for 3 hours and now cutting off with house restored to 20.5" ( see the graph below)

We knew the house was good when Roger spent (after receiving feed in tariff payments) just £80 on energy for the year. That is the total on energy, for lighting hot water, cooking, washing, everything.

Now we know just how good. By my calculations, the UFH has cost about 70p so far this winter. You can't even by a cup of coffee for that.

Now here's the kicker. According to SAP and the EPC, this house should cost £567/year just for the space heating, and is rated as only a B. Seriously? When government talks about the performance gap, it is because most houses use far more energy than predicted. Using Logix shows you how to get a performance gap, in your favour. 

Is this the best insulated house in the country? If you are doing as well we'd love to hear from you. (enquiries@logix.uk.com)