ᐅ With a controlled residential ventilation system plus an air source heat pump, can a wood-burning stove be a practical addition?

Dear colleagues of this forum,

My question concerns experiences with an air-to-water heat pump combined with a ventilation system with heat recovery (up to 90%) in a KfW 70 / 55 house.

We are planning to install a single-room heating stove with a matching chimney system in the new single-family house with a granny flat—as a purely comfort and supplementary heating solution for the living and dining area (about 35 m² (375 ft²)).

I believe that, from a heating technology perspective, this single-room heating can be omitted; however, we would still like to enjoy the sight of an "open" fire, perhaps for sentimental reasons.

My question as a topic for discussion is whether the warm to hot air generated during combustion could be distributed and utilized throughout the house via the ventilation system, thus providing additional heat to the entire building.

In other words, is such a heat supply actually meaningful?

Am I mistaken with this "amateur theory"?

Or am I simply looking for a justification for the rather high expenses?

Thank you for your replies.

Hello,

belabimba schrieb:
plus a ventilation system with heat recovery (up to 90%) in a KfW 70 / 55 house

What exactly is meant by this heat recovery—performance at a specific operating point or energy in the overall balance?

belabimba schrieb:
...Now we want to install a single-room heating system in the form of a wood stove with the corresponding chimney draft in the yet-to-be-built single-family house with a granny flat—just as a comfort and supplemental heating for the living and dining area (about 35 m² (375 ft²))

For an additional residential unit such as a granny flat, energy saving regulations and DIN 1946 require two separate controlled ventilation systems for residential rooms!!!

belabimba schrieb:
...I think from a heating perspective one can do without this single-room heating system, ..

That is correct!

belabimba schrieb:
...My question as a contribution to the discussion is that I can imagine that the warm to hot air generated during combustion could be distributed and used throughout the ventilation system, thus providing heat input to the entire house.

Technically almost everything is feasible or possible, but economically it hardly makes sense because air is a very poor medium for energy storage and transport! At best, the convective heat fraction could be used for the building, which of course is then lost from the room where the stove is located. The investment effort is disproportionate to the potential benefit!
For the same reason, many new construction projects with air-source heat pumps fail due to high running costs.

Best regards.