Hey everyone,
We are currently planning our small house and are facing the big question of which type of heating system to choose.
Gas heating + domestic hot water
Heat pump (air-to-water)
Geothermal energy
I have researched the different types extensively. It is also clear that the initial investment costs vary.
Which heating system is the most cost-effective in terms of operating expenses?
Here are a few key details:
KfW-55 standard
About 140m² (1,500 sq ft)
Controlled ventilation system
Underfloor heating on ground floor and upper floor
Thank you very much for your advice
We are currently planning our small house and are facing the big question of which type of heating system to choose.
Gas heating + domestic hot water
Heat pump (air-to-water)
Geothermal energy
I have researched the different types extensively. It is also clear that the initial investment costs vary.
Which heating system is the most cost-effective in terms of operating expenses?
Here are a few key details:
KfW-55 standard
About 140m² (1,500 sq ft)
Controlled ventilation system
Underfloor heating on ground floor and upper floor
Thank you very much for your advice
B
Bieber081522 Feb 2017 12:47G-Star1988 schrieb:
Gas incl. solar incl.
Air-to-water heat pump approx. 3500€
Geothermal approx. 13000€ By LWW, do you mean an air-to-water heat pump (commonly abbreviated as such, AFAIK)?
What advice can be given now? From my perspective, it is important that even with the gas option, planning is done for a low supply temperature and the underfloor heating is installed accordingly. Of course, a condensing gas boiler is used. And naturally, every choice must be based on a heating load calculation.
The packages would need to be specified. Is it more like the best/most expensive/most modern condensing gas boiler competing against the oldest/cheapest air-to-water heat pump, or are the offered systems comparable in terms of quality and technology?
Does geothermal mean ground source with boreholes or horizontal ground collectors?
What is the usage scenario? Is there frequent and long hot showering, or infrequent and short?
Also important for the decision: Do you have money to burn, or are investment costs a significant factor?
W
WilhelmRo22 Feb 2017 12:50@Invi85
Which type of geothermal system did you choose? The deep borehole or the surface collectors?
How much did your geothermal system cost? Specifically, the initial installation?
Regards
Which type of geothermal system did you choose? The deep borehole or the surface collectors?
How much did your geothermal system cost? Specifically, the initial installation?
Regards
G
G-Star198822 Feb 2017 13:10@Bieber0815
Exactly my air-to-water heat pump, sorry for the wrong abbreviation.
The specific products would be (or similar):
- Gas Vaillant ecoTEC plus package with solar storage VIH S300 and 2 rooftop collectors
- Air-to-water heat pump Rotex HPSU compact package type 27C with 500-liter (132-gallon) hot water storage tank
- Geothermal system with brine drilling Vaillant Geotherm VWS
Ventilation system Vaillant Recovair VAR
Showers are rather infrequent and short (due to an active lifestyle, showers mostly happen elsewhere)
Exactly my air-to-water heat pump, sorry for the wrong abbreviation.
The specific products would be (or similar):
- Gas Vaillant ecoTEC plus package with solar storage VIH S300 and 2 rooftop collectors
- Air-to-water heat pump Rotex HPSU compact package type 27C with 500-liter (132-gallon) hot water storage tank
- Geothermal system with brine drilling Vaillant Geotherm VWS
Ventilation system Vaillant Recovair VAR
Showers are rather infrequent and short (due to an active lifestyle, showers mostly happen elsewhere)
@WilhelmRo
We decided on a deep geothermal borehole. It went down about 136 meters (446 feet) into the ground.
The heat generator with accessories cost just under €11,000. The drilling itself added nearly €8,000 more.
We received a subsidy of €5,000, so the total for the heating system was close to €14,000. It’s not exactly cheap, but I didn’t want gas or an air-to-water heat pump.
Regards
We decided on a deep geothermal borehole. It went down about 136 meters (446 feet) into the ground.
The heat generator with accessories cost just under €11,000. The drilling itself added nearly €8,000 more.
We received a subsidy of €5,000, so the total for the heating system was close to €14,000. It’s not exactly cheap, but I didn’t want gas or an air-to-water heat pump.
Regards
P
Peanuts7422 Feb 2017 13:13The cost difference between gas heating and an air-to-water heat pump is practically negligible, since you also need a gas connection, which can easily cost more than 2,000 (currency not specified).
Otherwise, for a house of this size, if the heating system is properly designed, the monthly expenses for heating and hot water are unlikely to exceed €50 (approximately $55).
Even if you only need half as much energy with geothermal heating, you can calculate for yourself how long it will take to recoup the additional €10,000 (plus interest) in upfront costs.
By now, your existing heating system is probably due for replacement anyway...
You should also consider whether you want a fireplace in the living room; in that case, gas might be preferable, since the chimney flue is already in place.
If you opt for the air-to-water heat pump, your house likely doesn’t include a chimney flue, or installing one will incur extra costs.
Otherwise, for a house of this size, if the heating system is properly designed, the monthly expenses for heating and hot water are unlikely to exceed €50 (approximately $55).
Even if you only need half as much energy with geothermal heating, you can calculate for yourself how long it will take to recoup the additional €10,000 (plus interest) in upfront costs.
By now, your existing heating system is probably due for replacement anyway...
You should also consider whether you want a fireplace in the living room; in that case, gas might be preferable, since the chimney flue is already in place.
If you opt for the air-to-water heat pump, your house likely doesn’t include a chimney flue, or installing one will incur extra costs.
G
G-Star198822 Feb 2017 13:14A fireplace is not planned. While it is nice to have, I have often read that in KFW 55+ standard homes, people frequently open the windows because it gets too warm too quickly.
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