Hello everyone,
I’d like to briefly introduce our house project here. The goal is to exchange ideas with you on various topics and possibly create specific threads for detailed subtopics. Since we haven’t signed any contract yet and only have two initial rough quotes, I can’t provide details like heating load calculations at this stage. Thanks for your understanding.
Now for the first rough plan:
- Single-family house with about 170-180m² (1830-1940 sq ft) living space
- Bungalow
- Only the ground floor will be occupied
- Geothermal heating with 2 boreholes, each 80m (260 ft) deep, and a Nibe S1255 unit
- Floor slab insulation with glass gravel
- 36.5cm (14 inches) exterior walls made of Ytong masonry units
- Ceiling insulation using Ytong ceiling elements (maybe too expensive!?)
- Household of 2 people (likely to increase to 4)
- Decentralized ventilation (I’m not very satisfied with ReglerAir window units)
- Photovoltaic system on the roof, 7-10 kWp, without battery storage
- Triple-glazed PVC windows
I would appreciate your initial assessment and feedback.
Budget: Moderate, two incomes; total costs for the complete house (excluding furniture and kitchen) should not exceed 400,000 euros.
I will provide more information later.
Best regards and thanks for your feedback!
Peter
I’d like to briefly introduce our house project here. The goal is to exchange ideas with you on various topics and possibly create specific threads for detailed subtopics. Since we haven’t signed any contract yet and only have two initial rough quotes, I can’t provide details like heating load calculations at this stage. Thanks for your understanding.
Now for the first rough plan:
- Single-family house with about 170-180m² (1830-1940 sq ft) living space
- Bungalow
- Only the ground floor will be occupied
- Geothermal heating with 2 boreholes, each 80m (260 ft) deep, and a Nibe S1255 unit
- Floor slab insulation with glass gravel
- 36.5cm (14 inches) exterior walls made of Ytong masonry units
- Ceiling insulation using Ytong ceiling elements (maybe too expensive!?)
- Household of 2 people (likely to increase to 4)
- Decentralized ventilation (I’m not very satisfied with ReglerAir window units)
- Photovoltaic system on the roof, 7-10 kWp, without battery storage
- Triple-glazed PVC windows
I would appreciate your initial assessment and feedback.
Budget: Moderate, two incomes; total costs for the complete house (excluding furniture and kitchen) should not exceed 400,000 euros.
I will provide more information later.
Best regards and thanks for your feedback!
Peter
nordbayer schrieb:
Are you an eco-activist? If not, then an air-to-water heat pump or a slinky collector is significantly cheaper, and in terms of heating efficiency, the difference isn’t that big. BafA funding is also possible for both with some adjustments.I’m definitely not an eco-freak, but so far, deep geothermal energy has convinced me the most out of all energy sources. I would only consider a slinky collector for the sake of cost savings. We received an offer for 2 × 80 m (260 feet); the drilling would cost us 10,000 euros. If there are obstacles during drilling, the drilling will be done at another location at no extra charge. I found the offer quite interesting. According to the drilling company, difficulties in Brandenburg soil are very rare.
Edit: Annual average temperature: 9.6°C (49.3°F) according to the heat pump climate map
N
nordbayer26 Jan 2020 11:34PeterS90 schrieb:
I'm definitely not an eco-freak, but geothermal heating has convinced me more than any other energy source so far.If you see it as a pointless luxury expense like a wood-burning stove, a pool, or designer bathroom fixtures, that’s completely fair, and I wish you plenty of enjoyment with the stylish gadget. However, if the budget is tight, it would be a sensible item to cut.Quick question @nordbayer
Assuming a trench collector is chosen due to its cost-performance ratio. Then the general contractor calculates the heating load of the house and determines the required area based on the ground’s heat extraction capacity (+ a safety margin?). We have a 1200m2 (12,917 sq ft) plot and would definitely have enough space for the collectors. However, in winter the heat pump would have to work harder because the ground is naturally colder.
I would also need to check the heat extraction capacity of the local sandy soil. But if everything works out, the collectors would certainly be the better option.
Assuming a trench collector is chosen due to its cost-performance ratio. Then the general contractor calculates the heating load of the house and determines the required area based on the ground’s heat extraction capacity (+ a safety margin?). We have a 1200m2 (12,917 sq ft) plot and would definitely have enough space for the collectors. However, in winter the heat pump would have to work harder because the ground is naturally colder.
I would also need to check the heat extraction capacity of the local sandy soil. But if everything works out, the collectors would certainly be the better option.
nordbayer schrieb:
If you see it as a pointless luxury expense [...], that’s completely fair, and I wish you lots of fun with the fancy gadget. But if the budget is tight, it would be a good candidate for removal... Not everyone wants a "propeller" standing in their garden..
I would always choose geothermal energy!
Especially since there is a €4500 (about $4800) subsidy, making passive cooling possible as well.
N
nordbayer26 Jan 2020 12:15Sand is not ideal, but since you have more than enough space, you can comfortably plan for some extra margin. So this is a reasonable approach. The pink forum will help you with the design.
Yes, if the box is in the way, you can of course drill or dig.
Yes, if the box is in the way, you can of course drill or dig.
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