der_Micha
2012-11-11 11:46:24
- #1
Hello forum!
We finally want to build. The building plot is purchased, the architect’s plans are finished, the offers are being collected.
So far, so good – if it weren’t for that one point that all 5 providers answer inconsistently:
Everyone has at least one opinion on the topic of heating. These opinions contradict each other drastically, so that we – ignorant laypeople – now know nothing at all. We will soon resort to rolling dice to answer this question.
- The energy consultant says that in such a well-insulated house with heat recovery, no heating is needed for room air; for hot water, a small boiler is enough
- Provider A says that an air-source heat pump for this huge house is expensive and not economical.
- Provider B recommends pellet heating
- Provider C recommends a gas condensing boiler solution coupled with solar thermal
- Provider D recommends geothermal energy, which A and E advise against because the investment in the risky deep drilling will only pay off in 120 years.
- The keyword “mini power plant” has also come up in one place but was immediately criticized elsewhere!
The house:
Living space is spread over 2.5 floors with 130 sqm each,
additionally, 70 sqm in the basement will be used as practice/office space.
The ceiling height is effectively 2.75 m.
A ventilation system with heat recovery is firmly planned, as well as underfloor heating.
We would like photovoltaics and solar thermal if it makes economic sense.
With online “calculators” I have
a) no good feeling
b) no way to factor in the heat recovery
but the values are roughly heat demand 7000 kWh/a and heating load of 17.84 kW.
What do you recommend? What experiences have you had?
Regards,
Micha
We finally want to build. The building plot is purchased, the architect’s plans are finished, the offers are being collected.
So far, so good – if it weren’t for that one point that all 5 providers answer inconsistently:
Everyone has at least one opinion on the topic of heating. These opinions contradict each other drastically, so that we – ignorant laypeople – now know nothing at all. We will soon resort to rolling dice to answer this question.
- The energy consultant says that in such a well-insulated house with heat recovery, no heating is needed for room air; for hot water, a small boiler is enough
- Provider A says that an air-source heat pump for this huge house is expensive and not economical.
- Provider B recommends pellet heating
- Provider C recommends a gas condensing boiler solution coupled with solar thermal
- Provider D recommends geothermal energy, which A and E advise against because the investment in the risky deep drilling will only pay off in 120 years.
- The keyword “mini power plant” has also come up in one place but was immediately criticized elsewhere!
The house:
Living space is spread over 2.5 floors with 130 sqm each,
additionally, 70 sqm in the basement will be used as practice/office space.
The ceiling height is effectively 2.75 m.
A ventilation system with heat recovery is firmly planned, as well as underfloor heating.
We would like photovoltaics and solar thermal if it makes economic sense.
With online “calculators” I have
a) no good feeling
b) no way to factor in the heat recovery
but the values are roughly heat demand 7000 kWh/a and heating load of 17.84 kW.
What do you recommend? What experiences have you had?
Regards,
Micha