ᐅ Heating in Single-Family Homes, Underfloor Heating Renovation, Insulation, Gas Boiler Malfunction

Hello,

I have purchased a house built in 2000 with 140 m² (1,507 sq ft). However, the gas boiler is broken. I am also planning to convert to underfloor heating.

Now my question is: Which heating system should I choose? Another gas condensing boiler, an air heat pump, or something else? According to the heating engineer, if using an air heat pump, the underfloor heating pipes need to be laid closer together—10 cm (4 inches) spacing and 5 cm (2 inches) in the bathroom. Is this correct?

I’m not sure anymore what type of heating system to invest in.

Any advice would be greatly appreciated.

Hello,
Speculation is not suitable for such an investment. The spacing of the underfloor heating pipes is already compatible with a heat pump. Perhaps a brine-to-water heat pump with trenching or drilling could also be an option. Have a proper heat load calculation done for a small three-digit amount, and the choice will become easier.
Facts such as, for example, gas already being available in the house also naturally play a role.
Best regards

Cascada schrieb:
...Speculations are not suitable for such an investment.

Absolutely correct! Guesses and estimates are more likely to lead to a money pit. Only a comprehensive overall planning and sizing is effective here.

Best regards

According to the certificate for energy-saving thermal insulation, the annual heating energy demand is 15,804.49 kWh/year. Does that help? Basically, it’s a choice between a gas condensing boiler and an air source heat pump. Ground source heat pumps are too expensive for me. Possibly combined with solar panels or a water-circulating fireplace for additional support.

powertdi schrieb:
According to the energy-saving thermal insulation certificate, the annual heating energy demand is 15,804.49 kWh/a.
Does that help?

Hardly, because for this the actual demand (capacity, energy) for heating and domestic hot water is necessary and more relevant. Energy Saving Ordinance or KfW figures are only permitted by law for the primary energy compliance of a building project.
Heating systems or consumption estimates based on these figures are not allowed! Please read the fine print in the certificate! ;-)

powertdi schrieb:
... Possibly with solar or water-bearing fireplace for support.

I have already written several times here about their economic viability! => Search function.

Best regards.

Can you give me a tip on what you would personally choose? Or how others have decided?