Hello everyone,
I need an analysis of the offer from our heating installer.
I’m not entirely sure if the setup makes complete sense.
Key facts:
- 211 sqm (2272 sq ft) living area (two semi-detached houses, one larger with a utility room, one smaller rented part, no basement)
- completely underfloor heating, 35°C (95°F) supply temperature
- standard outside temperature -14°C (7°F), bivalence point -15°C (5°F), annual full-load hours 1859
- heating demand (based on specific heating demand): 4.8 kW, (specific heating demand 21.82 W/m2)
- annual energy demand: 8920 kWh
- domestic hot water for 7 people (max, currently 4, expected 6), 30 liters (8 gallons) per person
- no rain shower, normal bathtubs (hardly used)
Two different air-to-water heat pumps are being offered. (For your information: drilling is not possible/economical due to water protection zone, trench collector also not possible.)
- Hautec HWL-AS-52-AL (9.9 kW), combined storage tank 300/80 liters (79/21 gallons)
--> optionally with a hot water heat pump, which would cost an additional 3k. Does that even make sense?
- Dimplex HPL 9 S-TUW with Hydrotower (300/100 liters (79/26 gallons)) 7.0 kW heating capacity heat pump
--> alternatively the HPL12 S-TUW, because we are "on the edge with the demand," 1k extra cost
My questions are:
- Does the sizing make sense?
- Is the domestic hot water sizing appropriate?
- What is the typical price range for such offers?
- What could still be optimized, or which air-to-water heat pump would be the better solution? Regarding the seasonal performance factor, the smaller Dimplex seems to perform very well.
Cheers & thanks!
I need an analysis of the offer from our heating installer.
I’m not entirely sure if the setup makes complete sense.
Key facts:
- 211 sqm (2272 sq ft) living area (two semi-detached houses, one larger with a utility room, one smaller rented part, no basement)
- completely underfloor heating, 35°C (95°F) supply temperature
- standard outside temperature -14°C (7°F), bivalence point -15°C (5°F), annual full-load hours 1859
- heating demand (based on specific heating demand): 4.8 kW, (specific heating demand 21.82 W/m2)
- annual energy demand: 8920 kWh
- domestic hot water for 7 people (max, currently 4, expected 6), 30 liters (8 gallons) per person
- no rain shower, normal bathtubs (hardly used)
Two different air-to-water heat pumps are being offered. (For your information: drilling is not possible/economical due to water protection zone, trench collector also not possible.)
- Hautec HWL-AS-52-AL (9.9 kW), combined storage tank 300/80 liters (79/21 gallons)
--> optionally with a hot water heat pump, which would cost an additional 3k. Does that even make sense?
- Dimplex HPL 9 S-TUW with Hydrotower (300/100 liters (79/26 gallons)) 7.0 kW heating capacity heat pump
--> alternatively the HPL12 S-TUW, because we are "on the edge with the demand," 1k extra cost
My questions are:
- Does the sizing make sense?
- Is the domestic hot water sizing appropriate?
- What is the typical price range for such offers?
- What could still be optimized, or which air-to-water heat pump would be the better solution? Regarding the seasonal performance factor, the smaller Dimplex seems to perform very well.
Cheers & thanks!
B
Bauexperte29 Sep 2015 12:30Macallan schrieb:
- How expensive can the average market offers be?Each federal state has different building costs. Therefore, to receive useful answers from users, it would be helpful if you could complete your profile with the necessary information.Regards, Bauexperte
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