ᐅ Air-to-water heat pump with enclosure: yes or no?

I have the following problem: We want to build a KfW house with an air source heat pump. Now the builder says the air source heat pump cannot be installed because the development plan requires it to be enclosed. Are there air source heat pumps that are not allowed to be installed without an enclosure? Should the builder have informed me about this?

That’s it for now... I hope to get some answers here.

And why don’t you just build an enclosure?

If the development plan requires it, then it doesn’t matter what is available on the market, there simply has to be an enclosure.

Because the architect said it is not possible to build an enclosure around the air source heat pump. That was my question: are there air source heat pumps that are not allowed to be placed inside enclosures? Or is it generally the case that any air source heat pump, regardless of manufacturer, can be installed in an enclosure?

This concerns a Thermia iTec air source heat pump.

I’m not familiar with the air source heat pump, but if your architect thinks it won’t work (just call the manufacturer and ask), then simply choose a different one that does... What exactly is the problem?

Better to avoid enclosing structures

Oh God! Air source heat pumps are generally built without an enclosure, which is related to airflow and does not require further explanation. The development plan cannot prohibit technical necessities -> discussion with the local authority/municipality. Otherwise, the system should be installed according to the manufacturer’s specifications, as only then is there a guarantee of trouble-free operation.