Hello,
We are planning to build an urban villa. According to the building description, it will be constructed with 17.5 cm (7 inches) calcium silicate bricks and a 14 cm (5.5 inches) external thermal insulation composite system (ETICS), with a hipped roof at a 22-degree pitch.
The ceiling height should be 2.5 m (8.2 ft) for the 138 m² (1,487 ft²) living area.
The heating system specified in the building description is a Vaillant AuroCompact with a stratified storage tank (150 liters (40 gallons)), underfloor heating on both floors with individual room controls, and 2 solar panels (each 2.51 m² (27 ft²)).
We have now inquired about the additional cost if we want to upgrade to a KfW 70 energy standard house.
The following offer was made to us:
Increase insulation thickness from 14 to 16 cm (5.5 to 6.3 inches), install an air-to-air heat pump heating system (manufacturer not yet specified), and upgrade windows to triple glazing (currently Veka with double glazing, Ug 1.0). The price is €12,500. Is this justified? I find it a bit high, especially considering that the gas connection costs have already been offset in the calculation.
Unfortunately, I don’t know the heating load.
Regards,
Kay
We are planning to build an urban villa. According to the building description, it will be constructed with 17.5 cm (7 inches) calcium silicate bricks and a 14 cm (5.5 inches) external thermal insulation composite system (ETICS), with a hipped roof at a 22-degree pitch.
The ceiling height should be 2.5 m (8.2 ft) for the 138 m² (1,487 ft²) living area.
The heating system specified in the building description is a Vaillant AuroCompact with a stratified storage tank (150 liters (40 gallons)), underfloor heating on both floors with individual room controls, and 2 solar panels (each 2.51 m² (27 ft²)).
We have now inquired about the additional cost if we want to upgrade to a KfW 70 energy standard house.
The following offer was made to us:
Increase insulation thickness from 14 to 16 cm (5.5 to 6.3 inches), install an air-to-air heat pump heating system (manufacturer not yet specified), and upgrade windows to triple glazing (currently Veka with double glazing, Ug 1.0). The price is €12,500. Is this justified? I find it a bit high, especially considering that the gas connection costs have already been offset in the calculation.
Unfortunately, I don’t know the heating load.
Regards,
Kay
Mycraft schrieb:
Yeah, I would also like to see the actual results afterward... but the real measured values, not just what the general contractor calculated in advance...And how do you plan to measure the U-values? With a thermometer? :-D
humi schrieb:
That can be easily calculated afterward. You will simply pay more with higher consumption 😉Okay, based on my gas bill, I have now calculated the following values:
Roof: 0.143459352159238582
Base slab (foundation slab): 0.1957239528995293592059239
Wall: 0.205485195958358
Thanks for the tip!! I would never have thought to just calculate it on the computer
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