Renovation of heating system for existing property - condensing boiler/air-water heat pump/DHW heat pump

You can save a lot of costs with DIY work. For most things, you don’t need much technical understanding. Have the underfloor heating designed, as mentioned. Including a plan if possible. Then remove the screed, insulate the basement ceiling, lay the underfloor heating yourself according to the plan. The air-water heat pump can also be installed as a monoblock by yourself. There are good options from Panasonic in 5, 7, and 9KW. The biggest cost factor is then the new screed, because you’re more likely to have that done. I claim that overall you come to around 20k for the entire system. It costs time, sweat, and a bit of courage. But it’s possible and manageable even for laypeople.

Then remove the screed, insulate the basement ceiling, lay the underfloor heating yourself according to the plan. The air-water heat pump can also be installed as a monoblock by yourself. There are good options from Panasonic in 5, 7, and 9KW. The biggest cost factor is the new screed, because you’ll probably have that done. I claim that overall you’ll reach about 20k for the entire system. It costs time, sweat, and a bit of courage. But it’s possible and manageable even for laypeople.

I bet against the price! It will be cheaper in EL ;)

I bet against the price! It will be cheaper in EL ;)

I wouldn’t bet because I don’t know the price per sqm of screed :-)

I wouldn’t bet on it because I don’t know the price per square meter of screed :)

Calculate with €20 per sqm. Or if you prefer, with a price increase at €25. With calculation at 5-6 cm thickness.

You can save a lot of costs with your own work. For most things you don’t need much technical understanding. Have the underfloor heating designed as I said. Including a plan if possible. Then remove the screed, insulate the basement ceiling, lay the underfloor heating yourself according to the plan. The air-to-water heat pump can also be installed yourself as a monoblock. There are good options from Panasonic in 5, 7 and 9KW. The biggest cost factor then is the new screed, because you’ll probably have that done. I claim overall it comes to about 20k for the entire system. It costs time, sweat and a bit of courage. But it’s possible and also manageable for laymen.

I can and want to provide my own labor, but I would leave specialists in charge especially in the heating area. I have received a quote from the heating engineer of around 45k including the screed work required for underfloor heating on all floors (heat pump is [Weishaupt Biblock Typ WBB 12 A RMD AI]). I will commission a heating load calculation as well as the design of the underfloor heating and low-temperature radiators (which we want on the 1st and 2nd floors). I will then approach him again and ask him to adjust his offer/performance accordingly. That sounds like a good plan to me – hope it is one ;)

approx. 45k including the necessary screed work with underfloor heating on all floors

45 for heat pump, installation and underfloor heating everywhere? I would sign immediately!