Air heat pump or use gas and solar?

2012-07-18 19:12:03

Today or in 15...20 years?
Until then: good service

v.g.

It depends on what the money is still worth in 15-20 years. Maybe I will accept 100€ per month then.

2012-07-18 19:39:04

Well-developed air heat pumps already exist today. Unfortunately, these are not found in GU/GÜ projects, because here almost every piece of junk is pushed onto the clueless builder.

Is, for example, Vaillant Geotherm Plus junk? I can't imagine that... hmm

Which systems are that good - [B]Vaillant?[/B] The exact designation would of course be good... or is there some kind of secret here in the forum?

2012-07-19 07:37:00

Hello,
we have decided on an air heat pump for our construction project. I have already received the product data with technical details from our construction company. Besides the expected performance, I was also concerned about the noise level, as it should neither disturb us nor our neighbors when we want it warm.

We have chosen an air heat pump with a limit range of -25°. Recommended for a usable area of max. 300 sqm (we have 140 sqm to supply). The db is specified with max. 39, which is quite "quiet." I have seen other products that come with 60-90 db.

As for the consumption costs, I cannot say anything yet because the house is not finished... but I am quite optimistic about it...

Best regards, Britta

2012-07-19 08:59:30

....We decided on an air heat pump with a limit range of -25°. Recommended for a usable area of max. 300 sqm (we have to supply 140 sqm).

What heating load was calculated? Oversizing has a particularly negative effect on air heat pumps.

....I can’t say anything about the consumption costs yet because the house is not finished...

During the screed drying, it will have its first test of endurance. For air heat pumps, external heat meters for heating and domestic hot water separately are recommended. These allow consumption to be evaluated => COP or annual performance factor. They are also very helpful for optimizing system settings. The typical factory settings usually need to be adapted to the specific characteristics of the respective building project.

best regards

2012-08-25 22:16:35

Hello Euro!

Nice to see that I'm not the only one "professionally obsessed" with "my" topics

What good is it for me to know the consumption beforehand?
Except, of course, for the correct sizing of the heating system.
And with a gas condensing boiler, apparently you can't do too much wrong in the design, right?

Whether I have 50 euros or 500 euros a month, I have to live with it (as I said: if I have done everything necessary to optimize the heating system). I won't give up building the house because of that anyway...

I can't derive anything about my house from a small rental apartment. It already starts with the fact that I have no idea whether I will run the controlled residential ventilation in summer or not -> that already causes a variance of 50% in the electricity consumption of the controlled residential ventilation...
When I finally have a decent bathroom with a proper bathtub - how often will I (and especially my wife) bathe in winter? Probably more often than now - but how often??
Will we really light the wood stove as often as I imagine now? And if yes - how much does it heat the upper floors? Or am I completely dependent on the gas boiler up there?

These are all small questions I don't have answers to beforehand - but that can significantly influence my consumption costs in total...

Best regards!

Micha

My thoughts exactly. Usage conditions change over time anyway. Always this cost-benefit calculation. All pure theory and eye-wash. At the moment, prices for renewable energies are overpriced anyway. And what do you get for that? Partly immature technology! Better to rely on proven technology then. But definitely plan for a retrofit to the "new" technology (empty conduits or similar).

2012-08-25 23:10:36

Half-knowledge is harmful!

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Air heat pump or use gas and solar?

Musketier

gigi

Britta78

€uro

voko

voko