ᐅ Air-to-water heat pump or gas heating combined with controlled ventilation in a 135 sqm single-family home?
Created on: 18 Apr 2018 19:29
M
M4rvin
Hi everyone!
We want to build a single-family house with about 135 sqm (1453 sq ft) without a basement. Originally, we planned to install an air-to-water heat pump (Dimplex, ELCO, or Viessmann), but we just learned that the plot has a gas connection. We had actually ruled out gas because we did not want to install an external gas tank. (But the outdoor heat pump unit isn’t very attractive either...) The developer would credit us €4000 for a gas condensing boiler plus a solar system with two flat plate collectors.
Is it also possible to skip the solar system and instead install a ventilation system with heat recovery? I would like to have ventilation, but €12,300 is too expensive for me!
We are leaning toward 17.5 cm (7 inches) calcium silicate blocks, but without extra cost, 24 cm (9.5 inches) calcium silicate blocks or brick would also be possible. (EDIT: pitched roof and underfloor heating)
Thanks in advance,
M4rvin
We want to build a single-family house with about 135 sqm (1453 sq ft) without a basement. Originally, we planned to install an air-to-water heat pump (Dimplex, ELCO, or Viessmann), but we just learned that the plot has a gas connection. We had actually ruled out gas because we did not want to install an external gas tank. (But the outdoor heat pump unit isn’t very attractive either...) The developer would credit us €4000 for a gas condensing boiler plus a solar system with two flat plate collectors.
Is it also possible to skip the solar system and instead install a ventilation system with heat recovery? I would like to have ventilation, but €12,300 is too expensive for me!
We are leaning toward 17.5 cm (7 inches) calcium silicate blocks, but without extra cost, 24 cm (9.5 inches) calcium silicate blocks or brick would also be possible. (EDIT: pitched roof and underfloor heating)
Thanks in advance,
M4rvin
A
Aliban201425 May 2018 19:51Alex85 schrieb:
Qp 55% (energy demand)
H't 70% ("insulation")
These values are calculated by the energy consultant, who prepares the thermal protection certificate or the KfW certificates if a KfW program is used. Sorry if I’m misunderstanding:
Does Qp 55% mean that the building uses 45% less energy than required by the Energy Saving Ordinance?
And does H't 70% mean that the insulation performs 30% better than required by the Energy Saving Ordinance?
A
Aliban201425 May 2018 20:18A
Aliban201425 May 2018 20:20M4rvin schrieb:
The energy consultant calculated that.
We’re building without KFW funding, so I’m not sure whether it’s 55 or 70.What values did he calculate for your Qp and H‘t (like with Alex85?), and how far below the energy saving regulations do you fall?
The reference value for the annual primary energy demand is 62 kWh/m²*a, right?
Aliban2014 schrieb:
What values did he calculate for Qp and H‘t (like with Alex85?) in your case, and how much below the energy saving ordinance are you?
The reference value for annual primary energy demand is 62 kWh/m²*a, right?Sorry, I don’t know that. I’ll ask and get back to you!
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Aliban201425 May 2018 20:39M4rvin schrieb:
Sorry, I don’t know that. I’ll ask and get back to you!That would be great, thanks!!!
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