Hello everyone,
We are planning a new build with approximately 190 sqm (2,045 sq ft), two stories, without a basement. The attic, about 65 sqm (700 sq ft), will be converted to include a bathroom and a storage room. The house will have a brick veneer exterior and will be built according to the energy-saving regulations. It is for a household of five people (2 adults + 3 children).
A mechanical ventilation system with heat recovery and KNX home automation are planned (if the budget allows, specifically for the KNX).
Once the house is completed, I would like to add solar thermal and photovoltaic systems after a few years.
I’m having trouble deciding between gas heating or a heat pump.
The gas connection costs me €2,500.
Could you help me make this decision?
And which manufacturer would you recommend?
Thanks!!!
Regards
We are planning a new build with approximately 190 sqm (2,045 sq ft), two stories, without a basement. The attic, about 65 sqm (700 sq ft), will be converted to include a bathroom and a storage room. The house will have a brick veneer exterior and will be built according to the energy-saving regulations. It is for a household of five people (2 adults + 3 children).
A mechanical ventilation system with heat recovery and KNX home automation are planned (if the budget allows, specifically for the KNX).
Once the house is completed, I would like to add solar thermal and photovoltaic systems after a few years.
I’m having trouble deciding between gas heating or a heat pump.
The gas connection costs me €2,500.
Could you help me make this decision?
And which manufacturer would you recommend?
Thanks!!!
Regards
A
Alexander382 May 2019 12:12CoolCat schrieb:
Wait here for professional feedback from the expert. Thank you, and yes, I will do that.
Still, we are very grateful for your help, as it allows us to look at the topic from different perspectives.
B
boxandroof2 May 2019 12:16A compact unit is available starting at 3,000 euros. Installation can be done by any heating technician without special expertise. Maintenance costs are the same or lower compared to split systems. In case of a major defect, replacement is more affordable. Split systems require specialized knowledge and may include more complex technology, such as the domestic hot water storage tank. There is no advantage to using split systems.
I would only recommend a pure indoor installation if geothermal energy is used as the heat source.
Take a look at the "simple" hydraulic setup on the mentioned site; this is the ideal approach for all compact units. If your heating load is around 5 kW, then choose the unit recommended on that site. It won’t get cheaper than that, and it would be difficult to find a better solution.
I would only recommend a pure indoor installation if geothermal energy is used as the heat source.
Take a look at the "simple" hydraulic setup on the mentioned site; this is the ideal approach for all compact units. If your heating load is around 5 kW, then choose the unit recommended on that site. It won’t get cheaper than that, and it would be difficult to find a better solution.
Alexander38 schrieb:
Then the fundamental question remains whether to give the air-to-water heat pump a chance or to rely on the good old gas system. As I mentioned before, I would base the decision on the offers you receive. If you only get rejection offers for the air-to-water heat pump, it doesn’t make sense to go with it.
Some rough numbers off the top of my head: For a 210m² (2260 sq ft) area, with a supply temperature, heating costs are about 800€ with gas plus solar, while with an air-to-water heat pump and a 10kW photovoltaic system (considered as a unit), the costs are approximately zero.
Then you just have to consider how much the extra costs are worth to you compared to the savings.
Keeping in mind that the future development of electricity and gas prices is uncertain.
To be fair, it should also be said that with gas and photovoltaic (considered as a unit), heating costs would also only be a few euros.
A
Alexander382 May 2019 12:38Lumpi_LE schrieb:
As I mentioned before, I would base the decision on the offers you receive. If you only get discouraging offers for the air-to-water heat pump, it doesn’t make sense to go with it.
Just some rough numbers off the top of my head: For 210m² (2260 sq ft), you have heating costs of around 800€ with gas plus solar, while with an air-to-water heat pump and 10kW photovoltaic system (considered as one unit), the heating costs are about 0€.
Then you need to consider how much the extra costs are worth compared to the savings.
Of course, one has to keep in mind that the future prices of electricity and gas are uncertain.
To be fair, with gas and photovoltaic (as a unit), you would only have a small amount of heating costs left as well. Okay, thanks.
I hope we receive the offers today.
I will share them then.
Regarding photovoltaic systems:
We are planning to rent/lease them.
Are there any experiences or opinions on this?
If you pay 90€ per month and feed electricity into the grid, shouldn't that be financially worthwhile, since the air-to-water heat pump can be powered by the self-generated electricity?
Or is that an oversimplified calculation?
A
Alexander382 May 2019 12:58Lumpi_LE schrieb:
You can calculate it yourself. 90€ equals 22,000€ over 20 years.
For what system size? The typical 10 kWp systems usually cost around 12,000€, and even when considering interest, you don’t really get that result. Okay, yes, the 90€ was probably an exaggerated figure from my side.
Better not to be overly optimistic in calculations and then fail because of it.
Because paying 12,000€ all at once is unfortunately not feasible for us.
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