ᐅ Which Heat Pump Is Suitable for Monolithic Construction?

Hello, we are currently planning our single-family house of 165 m² (1,777 sq ft) in the Sauerland region.
We want to build using 36.5 or 42.5 cm (14.4 or 16.7 inches) hollow bricks without additional insulation, as we are not fans of external thermal insulation composite systems (ETICS). Underfloor heating is planned, probably no ventilation system, as it is too expensive.
Since the village is not connected to the natural gas network and we have no basement, therefore no space for, for example, pellet storage, we have to install a heat pump.
A ground source heat pump would cost €4,500 more after deducting the BAFa subsidy compared to an air source heat pump.
I have also often read that heat pumps do not make sense with monolithic construction.
What would you recommend?

Annika90 schrieb:

I have also often read that heat pumps don’t make sense with monolithic construction.

What is the reasoning behind that?

Annika90 schrieb:

I have often read that heat pumps do not make sense for monolithic construction.

That is nonsense. Please do not install a heat pump with anyone who claims that.

A heat pump generally becomes more efficient due to two factors: 1. low heat demand, for example through insulation or a ventilation system. 2. as large and appropriately designed heating surfaces as possible for each room.

The construction method does not affect this, and it does not mean that a heat pump cannot work well in a newly built home without excessive insulation or a ventilation system. More important than the insulation is the design and operation of the heat pump and the entire hydraulic system.

Annika90 schrieb:

What would you recommend to us?

When it comes to heat pumps, it’s important to educate yourself thoroughly. Keywords for research: room-specific heating load calculation, no buffer tank, no individual room control, modulating operation, don’t oversize, horizontal ground loop (trench collector).

Oh dear, there is still a lot of clarification needed here.

You definitely have more options than just a heat pump. Just because there is no gas network in the village does not mean you can’t heat with gas. You would just need a gas tank and possibly other measures to comply with the energy saving regulations (solar panels? Additional insulation? Controlled mechanical ventilation?).

Next topic: You shouldn’t simply dismiss the ventilation issue just because someone said that a ventilation system would be too expensive overall.

Where exactly are you building in the Sauerland region? At what elevation? Here, an air source heat pump could potentially be problematic or inefficient.

The elevation is 348 m (1,142 ft) above sea level. Yes, I am aware of the gas tank situation. However, based on my research, it is not considered efficient. Therefore, I have decided to go with a heat pump, although I am still unsure which type of water heater to choose.

With photovoltaic systems, heat pumps, and optional ventilation units, a house is equipped in a modern and future-proof way and can largely operate without fossil fuels. Alternatives certainly exist, but in my opinion, gas tanks and solar thermal systems are not among them—especially not in new construction.

Ventilation provides comfort, photovoltaic systems pay off on their own, and heat pumps should be carefully planned.