Quote:
Originally Posted by randen
Nothing on TV so I'm playing with the math. Were do we fit with the Passive Haus??
House 3600 sq. ft. or 334.0 sq mtrs.
334.0 * 120kwhs= 40080kwh/yr. or less for Passive Haus designation.
If we explore only heat the envelope for the home I will have to go back to my records of heating with the very bad, very neanderthal oil heating.
We used depending on the heating season 340 ltrs to 284 ltrs per month for a years heating
Lets use the worst case. 340 * 12= 4080 ltrs / year.
We heated the floor with a domestic oil fired hot water heater. I checked the manufactures spec. and it fires between 77-80% efficiency
The conversion of a liter of heating oil to kwh's is
4080 * 11.69 = 47695.2 kwh/yr input of oil
47695.2 * 0.785 (efficiency median) = 37417 Kwh's output of heat from water heater.
Would this indicate that we have qualified for Passive Haus???
37417Kwh's is less than 40080Kwh's
Randen
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Is the 120KWh/yr not the figure for everything EXCEPT heating, as in cooking lighting TV etc.
It's 15KWh/yr for heating.
So 334 * 15 = 5010KWh/yr
Unless 86.6% of that oil was burned for DHW not heating then it doesn's sound very passive haus.
Steve