ᐅ Possible House Purchase – Air-to-Water Heat Pump Could Become a Money Pit
Created on: 15 Jun 2017 19:31
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Chris1982_1
Hello experts.
A house that was built solidly three years ago (without insulation) is up for sale.
The house is equipped with an air-to-water heat pump as well as a fireplace. There are no solar thermal or photovoltaic systems.
Heating is provided by the air heat pump and the fireplace, and an energy performance certificate is available. The values have varied somewhat over the three years, but well.
The seller gave me the invoice for the heat pump and the underfloor heating yesterday.
How can I tell if this is a "good" energy concept?
Before I buy, I want to make sure I’m not getting into a money pit.
Do I possibly need the exact external wall thickness (which type of masonry), roof insulation, window specifications, etc. for that?
I would appreciate any information. Have a nice evening and best regards, Chris
A house that was built solidly three years ago (without insulation) is up for sale.
The house is equipped with an air-to-water heat pump as well as a fireplace. There are no solar thermal or photovoltaic systems.
Heating is provided by the air heat pump and the fireplace, and an energy performance certificate is available. The values have varied somewhat over the three years, but well.
The seller gave me the invoice for the heat pump and the underfloor heating yesterday.
How can I tell if this is a "good" energy concept?
Before I buy, I want to make sure I’m not getting into a money pit.
Do I possibly need the exact external wall thickness (which type of masonry), roof insulation, window specifications, etc. for that?
I would appreciate any information. Have a nice evening and best regards, Chris
Chris1982_1 schrieb:
So, after a quick phone call with the seller, his estimated monthly electricity bill is actually 210€ (about $230) per month. So your calculation seems accurate.
The house is 198 square meters (2,130 square feet), without any insulation.
Regarding COP: At A7/W35 the heating capacity is just under 10 kW, with a COP of 4.4.
Are these details sufficient?
It all still seems a bit high to me.
Can the heat pump be adjusted for better efficiency (if yes, how or what should I look for), or is the missing insulation the main limiting factor for the bill?
Thanks for your feedback.Darn!
The three-year-old house (which is like new to us, almost brand new) is from 2013/14, not from the last century.
It was insulated at the time, under the Energy Saving Regulation 100 as well as KfW 70 and others. Regardless of whether it’s 36 cm (14 inches) Poroton or aerated concrete blocks, the house complies with the insulation standards.
According to which Energy Saving Regulation was it built?
They need to explain those poor figures. Otherwise, no one will buy it.
But in my opinion (I don’t know much about technology): even if you calculate consumption optimistically, the actual cost will probably end up somewhere in the middle – 210€ versus roughly ±70€ ... so around 140€ (about $150).
I’m actually glad that in 2013 we opted for a solid gas heating system with solar thermal panels —> lower upfront costs, lower heating bills.
Best regards,
Yvonne
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Chris1982_115 Jun 2017 22:36Hello Yvonne,
oh no?
The house was built according to the 2013 energy-saving regulations.
By "without insulation," it means that no additional insulation was installed on the masonry.
oh no?
The house was built according to the 2013 energy-saving regulations.
By "without insulation," it means that no additional insulation was installed on the masonry.
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Chris1982_115 Jun 2017 22:37I just don’t know if these values are really bad. To me, they seem quite high.
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