Additional costs equal ZERO

Hello,
I want to have a little house built. A single-family house with 112m² of living space.
I assume that according to the Energy Saving Ordinance 2009 all houses are very well insulated. Since I am not a fan of throwing my money down the throat of the big energy companies, the house will have an air-to-water heat pump, a ventilation system with heat recovery, and a photovoltaic system on the roof.
Because the thought goes like this: Photovoltaic system generates electricity, air-to-water heat pump needs electricity, and the ventilation system prevents mold and, because it runs with heat recovery, I don’t need as much electricity to keep the house warm.
I am happy to be proven wrong!
Best regards

Hello,

...Since I am not a friend of throwing my money down the throat of the big energy companies, a air-to-water heat pump, a ventilation system with heat recovery, and a photovoltaic system on the roof are planned for the house.

The basic concept is already quite good, but it assumes that all the framework parameters fit an air heat pump and that the entire system has been precisely sized/calculated. In doing so, the respective COP and performance curves of the manufacturers must also be considered. An annual performance factor of about 3.5 should then be possible.
However, the ancillary costs unfortunately will not be = 0! ;)

Best regards

Hello,

I want to have a little house built. A single-family house with 112m² of living space.
I assume that according to the Energy Saving Ordinance 2009 all houses are very well insulated. Since I am not a fan of throwing my money down the throat of the big energy companies, the house should have an air-water heat pump, a ventilation system with heat recovery, and a photovoltaic system on the roof.

Because foolish thinking: photovoltaic system produces electricity, air-water heat pump consumes electricity, and the ventilation system is against mold and, because it runs with heat recovery, I don’t need that much electricity to keep the house warm.

I’m happy to be proven otherwise!


Best regards

Hello!

Heat pump is good, HR ventilation is good, but there is absolutely no connection to photovoltaics.

A direct feed-in of the solar electricity into the house network is economically nonsensical and technically difficult/impossible.

By the way: For how many people are the 112 sqm (+ basement?) intended?

Best regards,
TomTom.

...A direct feed-in of the solar power into the household grid..

There was no reference to this.

Regards.

Because thoughtlessly: Photovoltaic system generates electricity, air-water heat pump needs electricity .... Best regards

There was therefore no reference to direct feed-in..... Well, well - how did I come up with a connection there?

- how did I even come up with a connection there?

Maybe differentiating between power (kW) and energy (kWh) helps a bit? :o

best regards