ᐅ Condensing Gas Boiler, Air-to-Water Heat Pump, Fuel Cells – Request for Advice
Created on: 9 Apr 2018 20:46
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gmt94Hello everyone,
We are currently in the planning phase for our new home. We are building an urban villa of about 157 m² (1,690 sq ft) according to energy-saving regulations.
My favorite option until this morning was a heat pump with deep geothermal drilling plus a conventional fireplace. However, the drilling company declined the order today due to too high a risk. So I need a new heating alternative.
We are three people: man, woman, and toddler, possibly a fourth child. The child usually takes a bath daily, so there will likely be a relatively high hot water consumption. A rain shower would be desirable.
1. Air-to-water heat pump – somehow I just can’t get comfortable with this option. On one hand, it bothers me that the system is very sensitive to outside temperature, and on the other hand, I’m concerned about the appearance on the house and the noise.
2. Gas condensing boiler with solar hot water support and central ventilation with heat recovery. Since this requires a relatively large water storage tank, I thought of installing a water-bearing (water-carrying) fireplace. This would reduce the risk of overheating the living room, among other things, and the remaining energy could be used for water heating. Woodworking is my hobby. I have a chainsaw license, saw, wood splitter, trailer, and relatively cheap wood is available.
3. My builder also suggested an alternative to the gas boiler: a fuel cell. I haven’t looked into this at all. Does anyone have experience with it?
I hope you can help me. Oh, and ground collectors are not an option due to insufficient space on the plot.
We are currently in the planning phase for our new home. We are building an urban villa of about 157 m² (1,690 sq ft) according to energy-saving regulations.
My favorite option until this morning was a heat pump with deep geothermal drilling plus a conventional fireplace. However, the drilling company declined the order today due to too high a risk. So I need a new heating alternative.
We are three people: man, woman, and toddler, possibly a fourth child. The child usually takes a bath daily, so there will likely be a relatively high hot water consumption. A rain shower would be desirable.
1. Air-to-water heat pump – somehow I just can’t get comfortable with this option. On one hand, it bothers me that the system is very sensitive to outside temperature, and on the other hand, I’m concerned about the appearance on the house and the noise.
2. Gas condensing boiler with solar hot water support and central ventilation with heat recovery. Since this requires a relatively large water storage tank, I thought of installing a water-bearing (water-carrying) fireplace. This would reduce the risk of overheating the living room, among other things, and the remaining energy could be used for water heating. Woodworking is my hobby. I have a chainsaw license, saw, wood splitter, trailer, and relatively cheap wood is available.
3. My builder also suggested an alternative to the gas boiler: a fuel cell. I haven’t looked into this at all. Does anyone have experience with it?
I hope you can help me. Oh, and ground collectors are not an option due to insufficient space on the plot.
M
Mastermind19 Apr 2018 21:24Definitely option 2. But even then, include underfloor heating and a heat load calculation plus the design of the underfloor heating system. That way, when you replace the heating system the first time in several decades, you’ll already be set. Maybe by then you can pick up an air source heat pump at Aldi with great efficiency... who knows?
Gas is always the best option, but it must be available. Oil would also be great, but almost no one installs those systems anymore, and people tend to think you're crazy, even though modern oil heating systems are very efficient and don’t require large tanks anymore.
Air-to-water heat pumps have improved a lot compared to earlier models, which were noisy and inefficient. HOWEVER, they are not cost-effective due to high initial investment and shorter lifespan.
Deep geothermal drilling can be the most expensive option depending on the offer and is only suitable for enthusiasts.
So, go with gas and you’ll be happy 🙂
Air-to-water heat pumps have improved a lot compared to earlier models, which were noisy and inefficient. HOWEVER, they are not cost-effective due to high initial investment and shorter lifespan.
Deep geothermal drilling can be the most expensive option depending on the offer and is only suitable for enthusiasts.
So, go with gas and you’ll be happy 🙂
B
Baumfachmann9 Apr 2018 21:28Exactly, gas condensing boiler
One has to look at this realistically and put aside any fascination with technology.
Here is my calculation.
House: 108 sqm (1163 sq ft), 600 euros gas per year.
6,000 euros investment in a Junkers boiler plus 6 sqm (65 sq ft) fuel cells plus storage, divided by 10 years gives 600 euros per year.
Gas connection 750 euros, over a 100-year house lifespan gives 7.50 euros per year. Plus 25 euros chimney sweep per year.
Total costs: 1,232.50 euros per year.
Based on a 10-year perspective.
What do you think an air-to-water heat pump or a fuel cell costs? Always calculate over 10 years; anything else is not honest. The system does not even last 20 years. Karsten
Here is my calculation.
House: 108 sqm (1163 sq ft), 600 euros gas per year.
6,000 euros investment in a Junkers boiler plus 6 sqm (65 sq ft) fuel cells plus storage, divided by 10 years gives 600 euros per year.
Gas connection 750 euros, over a 100-year house lifespan gives 7.50 euros per year. Plus 25 euros chimney sweep per year.
Total costs: 1,232.50 euros per year.
Based on a 10-year perspective.
What do you think an air-to-water heat pump or a fuel cell costs? Always calculate over 10 years; anything else is not honest. The system does not even last 20 years. Karsten
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