Good morning house building forum and everyone,
I’m new here and also just starting the preliminary planning as a future homeowner.
As you could read in the subject, I have a general question about heating systems. We have already had several discussions with different prefab home companies (Streif Haus, Fingerhaus, Schwabenhaus, etc.). In all these conversations, we hoped to get clarity on which system would be the better heating option.
We would like to clarify the following areas:
- Economic aspects
- Ecological impact
- Sustainability (durability of the appliances and similar factors)
- Heating performance
- Additional costs for cooling in summer
(All systems were offered to us with underfloor heating.)
Unfortunately, we’re even more confused now, hence the request here in the forum.
(Of course, we also hope for a bit more “honesty” here... after all, these companies want to make their money.)
PS: The house to be built should be at least a KfW 55 standard, ideally a KfW 40.
Many thanks in advance for reading.
Best regards,
Datin
I’m new here and also just starting the preliminary planning as a future homeowner.
As you could read in the subject, I have a general question about heating systems. We have already had several discussions with different prefab home companies (Streif Haus, Fingerhaus, Schwabenhaus, etc.). In all these conversations, we hoped to get clarity on which system would be the better heating option.
We would like to clarify the following areas:
- Economic aspects
- Ecological impact
- Sustainability (durability of the appliances and similar factors)
- Heating performance
- Additional costs for cooling in summer
(All systems were offered to us with underfloor heating.)
Unfortunately, we’re even more confused now, hence the request here in the forum.
(Of course, we also hope for a bit more “honesty” here... after all, these companies want to make their money.)
PS: The house to be built should be at least a KfW 55 standard, ideally a KfW 40.
Many thanks in advance for reading.
Best regards,
Datin
The topic has been discussed many times before...
It depends on what you can afford and what you want.
Geothermal energy is great all year round but more expensive to install... whether it’s a horizontal trench collector or deep drilling, both are relatively costly.
An air-source heat pump is cheaper to install but loses efficiency at subzero temperatures, so for example, hot water then needs to be heated using an electric heating element or instant water heater.
It depends on what you can afford and what you want.
Geothermal energy is great all year round but more expensive to install... whether it’s a horizontal trench collector or deep drilling, both are relatively costly.
An air-source heat pump is cheaper to install but loses efficiency at subzero temperatures, so for example, hot water then needs to be heated using an electric heating element or instant water heater.
Hello Mycraft,
Thank you for your quick response.
I have actually found this topic a few times in the forum, but I never really got my questions answered.
Geothermal energy would be possible for us using deep drilling up to 100 m (330 feet), but everyone seems to avoid discussing the costs... The only information we received was that there is a subsidy for deep drilling from BAFA amounting to about 4,500 to 5,000 €.
For example, Schwabenhaus offers to cover all the drilling costs, no matter how many boreholes are needed.
Regarding geothermal energy again:
We were told that a geothermal system would allow nearly cost-free cooling in the summer. Would you confirm this?
With air-source heat pumps, cooling is also possible, but only with increased additional costs.
Thank you for your quick response.
I have actually found this topic a few times in the forum, but I never really got my questions answered.
Geothermal energy would be possible for us using deep drilling up to 100 m (330 feet), but everyone seems to avoid discussing the costs... The only information we received was that there is a subsidy for deep drilling from BAFA amounting to about 4,500 to 5,000 €.
For example, Schwabenhaus offers to cover all the drilling costs, no matter how many boreholes are needed.
Regarding geothermal energy again:
We were told that a geothermal system would allow nearly cost-free cooling in the summer. Would you confirm this?
With air-source heat pumps, cooling is also possible, but only with increased additional costs.
G
Goldi091117 May 2016 11:13But cooling only works with a mechanical ventilation system with heat recovery, right, or am I mistaken?
Datin schrieb:
We were told that with a geothermal system, air conditioning in summer is almost free of cost. Would you confirm this?
With an air-source heat pump, this is also possible but with significantly higher additional costs.Well, that's not entirely correct. Basically, it's the same system, except one draws energy from the ground and the other from the air.
Air conditioning at no cost is more of a sales pitch than reality. You can get a cold floor much faster with geothermal heating, yes, but that's about it. That does not mean the house itself becomes cooler.
If you install cooling ceilings in addition, then you can talk about air conditioning, but the investment costs are then almost as high as with a conventional air conditioning system.
@Goldi09111
Controlled mechanical ventilation has nothing to do with air conditioning... it only provides fresh air in the house. However, this air can be around 30°C (86°F).
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