Gas usage down, approx. 200kwh through Spring and Summer.
House generally drier and fresher.
The Solarventi unit, as discussed in this blog elsewhere, is not going to save money over it's lifetime, but it is very pleasent on a spring or autumn sunny day.
In the winter, Dec/Jan the sun is not powerful enough for the unit to raise the temperature of the air, so dry cool air enters the house. My advice - turn the unit speed right down to minimum at that time of year.
Having said that, this year has been poor for crisp sunny days.
Now it's February, and finally the unit is able to perform at full speed again.
As for the Mitsubishi Heavy Industries air-to-air hyper-inverter that we installed in September 2009, that has seen our electric usage double over the winter months, but gas half. Again, with low temperatures over Dec/Jan, this is to be expected, but this will prove it's worth once temps reach 7 degrees C or more. At that point gas usage will be minimal.
God bless you.
