Help with my high energy bills for new efficient home
Last year I finished building my new high-performance house and I just made it through my first winter up here in NH. While the home performed phenomenally well on paper when I had it audited for the energy star program, my electrical usage seems to indicate the opposite The HERS rating came out to 33 and the blower door test came out to .46 ACH. The strange thing is, my electrical usage has been ranging from 2,000 kWh in Feb when the average temperature was 20F. In April the average temp was 36F and we used 1000 kWh.
A little bit about the home.
The house is a ranch with unfinished lower walkout. It is 65 ft by 28 ft and is roughly 1800 sq ft on the first floor and same for the lower. It has 9 ft ceilings.
It was built with a double stud wall, dense packed cellulose. R40 walls and R60 attic. The windows are all triple pane Intus and the whole interior has a Siga membrane that has been air sealed with tape. The basement has spray foam interior walls and 2 inch rigid foam on the exterior and under slab
The house is ventilated by the Panasonic intelli balance 100 and we keep it at a constant 50 CFM running 100% of the time.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part