Controlled Residential Ventilation & Heat Pump: Viessmann vs. Vaillant vs. Zehnder?

Shouldn't you rather check where the smell on your property is coming from and try to eliminate it?

It is as WilderSueden already said, we are sitting in a very old town center in the middle of the last bit of meadow, surrounded by very old houses (some of them still beautiful old half-timbered houses). Here, it feels like everyone heats with a fireplace and the basic smell is quite strong, sometimes stronger and sometimes less strong. Therefore, for us the activated carbon filter is probably mandatory for now (and presumably also healthy).

What kind of [one] are you getting and how big will the house be?

Thank you very much for your inquiry! Can you really give us a rough figure?

Please tell me exactly what information you need. Square meters or cubic meters, only of the rooms that are heated or also those in the basement that are only utility space and not heated (there are also heated rooms there)? We actually don't know much about ventilation rooms yet, no one has talked to us about that yet, do those also go into the utility basement?

So at least in the offer we have the Viessmann Vitocal 200-A as the heat pump and also the Vitovent 300W from Viessmann as the controlled residential ventilation. As an alternative, Vaillant was mentioned, although I am quite sure that Viessmann will be prioritized (at least by them, since we still have no idea if the stuff is good).

I would be happy if you (or anyone else, or collectively) could at least say something roughly about the design, so just write what you need, then I will gladly calculate the stuff together…

I don't understand the problem. There are activated carbon filters for the Vitovent 300W, aren't there?

Square meters or cubic meters

Of rooms that are to be ventilated or exhausted by the system.

About rooms that are to be ventilated/supplied with air by the system.

Do you need square meters or cubic meters?

I don't understand the problem. There are activated carbon filters for the Vitovent 300W, aren't there?

I only found one homepage and was afraid that if they no longer offer it, that's it... And I'm also not sure if they are as good as a separate filter box, do you think so?

So, I have now added everything up and come to the following figures. The individual rooms are rather approximate, the total numbers of the floors are exact figures.

EG: 87.06m2 and 166.89m3
Living: ~24m2
Dining/Cooking: ~32m2 (open kitchen and the living room has a passage without a door)
Pantry: ~3m2
Hallway with adjacent and open wardrobe: ~11m2
Guest room: ~13m2
Guest bathroom: ~5m2

OG: 66.23m2 and 166.89m3
Sleeping: ~15m2
Dressing room: ~8m2
Bathroom: ~14m2
Child’s room: ~12m2
Gallery: ~16m2

Between EG and OG there is still an air space of 3.2x2.4m that has not been included anywhere yet. It is located above Dining below and leads into the Gallery above.

UG: 32.03m2 and 73.67m3 (Basement 1 and 2)
Basement 1 heated: ~27m2
Basement 2 heated: ~5m2
Basement 3 cold: ~20m2
Basement 4 cold: ~10m2
Hobby room cold: ~6m2
Technical room: ~14m2

In the basement we do not know if there will also be ventilation here, in Basement 1 and 2 we would like it because heating can also be installed here (if necessary). In the hobby room and Basement 4 we will ask when the house is built if they can also install heating here, but whether that will work is doubtful and if not, it is not such a big problem.

Can someone here now tell us whether the heating and controlled residential ventilation have been properly dimensioned?

In which rooms do you see air supply and exhaust vents? What really surprises me right now are the numbers of units from the contract, it only lists 6 supply air and 5 exhaust air valves. That really seems very few to us, don’t we need a lot more here?

I am really very grateful for your help!!!

Rough estimation.
For simplicity, I took EG, OG, and basement, so about 407m³. For normal operation, I would aim for a 0.6–0.7-fold air change, so about 244m³/h to 284m³/h. For intensive use, 1 – 1.2-fold air change, so 407m³/h to 488m³/h. For moisture protection, about 0.4-fold air change, so about 163m³/h.
I think with a controlled residential ventilation that manages 500m³/h. With the planned filters, a 1-fold air change should be feasible.

The number of disc valves is basically determined by the number of rooms. Living and recreational rooms get supply air. Bathrooms, kitchen, and utility room get exhaust air.
Design everything so that there is as low a volume flow as possible in the ventilation ducts/pipes.

As said, just a rough calculation