S
smurf2657916 Mar 2019 20:08Hello everyone,
I have a question regarding a heating system renovation. I am new here and hope this is the right place for my inquiry.
We are currently planning to modernize our heating system. Our house was built in 1995, conventional construction, Poroton bricks, underfloor heating, about 220m² (2,368 sq ft).
We are currently heating with oil (consumption about 4000 liters/year (1057 gallons)), without a condensing boiler.
We are refinancing at the moment and would like to remove the oil heating system to get rid of the oil tanks and later convert the gained space into living areas.
As options, gas or a geothermal heat pump have emerged. Air-to-water heat pumps are not an option since we do not want an outdoor unit. Gas could be connected to the house for under 2000 euros, the investment is manageable, but it would still mean relying on a fossil fuel. According to our quotes, converting to gas would cost around 16,000 euros.
Geothermal would be possible for us. Our neighbor has a borehole of about 100 meters (328 feet). I do not know the details. According to our quotes, we expect costs around 35,000 euros. The drilling company offered a borehole with 3 x 45 meters (3 x 148 feet), 3 x 15 kW.
Now, I have no idea how to evaluate this borehole or if it is sufficient. It confuses me that the neighbor only has the one borehole, which goes significantly deeper.
In principle, we are also unsure whether the considerably higher investment will ever pay off (apart from the gas dependency). Our neighbor uses about 50-60 euros of electricity per month for his heat pump but has a low-energy house with a ventilation system. We have generally left out subsidies for now. The region of Hesse offers discounted electricity tariffs for heat pumps.
Perhaps someone can give us an assessment to help us with our decision-making. We would really appreciate it.
Best regards
Christian Kumpf
I have a question regarding a heating system renovation. I am new here and hope this is the right place for my inquiry.
We are currently planning to modernize our heating system. Our house was built in 1995, conventional construction, Poroton bricks, underfloor heating, about 220m² (2,368 sq ft).
We are currently heating with oil (consumption about 4000 liters/year (1057 gallons)), without a condensing boiler.
We are refinancing at the moment and would like to remove the oil heating system to get rid of the oil tanks and later convert the gained space into living areas.
As options, gas or a geothermal heat pump have emerged. Air-to-water heat pumps are not an option since we do not want an outdoor unit. Gas could be connected to the house for under 2000 euros, the investment is manageable, but it would still mean relying on a fossil fuel. According to our quotes, converting to gas would cost around 16,000 euros.
Geothermal would be possible for us. Our neighbor has a borehole of about 100 meters (328 feet). I do not know the details. According to our quotes, we expect costs around 35,000 euros. The drilling company offered a borehole with 3 x 45 meters (3 x 148 feet), 3 x 15 kW.
Now, I have no idea how to evaluate this borehole or if it is sufficient. It confuses me that the neighbor only has the one borehole, which goes significantly deeper.
In principle, we are also unsure whether the considerably higher investment will ever pay off (apart from the gas dependency). Our neighbor uses about 50-60 euros of electricity per month for his heat pump but has a low-energy house with a ventilation system. We have generally left out subsidies for now. The region of Hesse offers discounted electricity tariffs for heat pumps.
Perhaps someone can give us an assessment to help us with our decision-making. We would really appreciate it.
Best regards
Christian Kumpf
B
boxandroof16 Mar 2019 20:53Exactly, definitely gas. Heat pumps are a high risk in older buildings. Especially with your level of consumption.
The planning, heating surfaces, and the house itself must be suitable for the heat pump, otherwise you will face very high electricity costs. And you definitely cannot rely on the contractors or salespeople for the planning.
Alternatively, you could prepare your house first and educate yourself about heat pumps since your current heating system is still working. But that is a longer process, costly, and probably not practical given the year your house was built.
The planning, heating surfaces, and the house itself must be suitable for the heat pump, otherwise you will face very high electricity costs. And you definitely cannot rely on the contractors or salespeople for the planning.
Alternatively, you could prepare your house first and educate yourself about heat pumps since your current heating system is still working. But that is a longer process, costly, and probably not practical given the year your house was built.
S
smurf2657916 Mar 2019 21:40Nordlys schrieb:
Gas. Ask if gas suppliers offer subsidies for conversions. Ours, for example, covers the cost of oil tank removal when switching to gas. Thanks, Nordlys – The connection fee of under 2000 euros (about $2200) basically counts as the subsidy – the line to our basement is around 14 meters (46 feet). Without this offer, they would have charged 3,000 to 4,000 euros ($3300 to $4400).
S
smurf2657916 Mar 2019 21:43Bookstar schrieb:
No hesitation, of course gas because it’s much cheaper and more reliable technology There is always the lingering fear of investing in the wrong technology – but gut feeling and reason tell us that with gas, we have a fair price and proven technology….
Similar topics