ᐅ Is the heating, ventilation, and air conditioning (HVAC) system adequately sized? Any experiences or feedback?

Hello everyone,

we are currently planning our house and have received a draft. At the moment, we are wondering if the utility room might be too small. I have attached a drawing.
The 12.44 sqm (134 sq ft) apparently includes the space under the stairs as well. Of course, that area can be used to store items that are rarely needed, but will all our technical equipment fit in the room?
Unless I have forgotten something, the following should be accommodated there:

• Air source heat pump including cooling (not air conditioning, no split unit)
• Ventilation system
• Energy storage (solar battery)
• Inverter for the photovoltaic system
• Underfloor heating (for 200 sqm (2153 sq ft))
• Electrical panel (two very large cabinets due to smart home systems)
• Connections (water, electricity, fiber optic, etc.)
• Optionally a small server cabinet

I think it won’t fit, but it’s hard to judge. Maybe the space under the stairs can be used, or the area above the underfloor heating could be used to install the electrical panels, or the energy storage and inverter. However, I’m not sure if this is possible or allowed.
What is your assessment? If it doesn’t fit, by how much should I increase the room size to make it work?

Good luck

P.S. Water softener system

It’s best if you draft everything with the manufacturer’s measurements included.

The main electrical connection can be routed over the water pipe.
Our fuse box is 1.4 m (4.6 ft) high, so there isn’t much space above or below it.

For 12 sqm (130 sq ft), the entire staircase must be included, although at least 50% of it does not have standing height.
I would not count that part.

What kind of system is the underfloor heating supposed to be?

readytorumble schrieb:
What kind of device is the underfloor heating supposed to be?

I think he means the control system.

If by FHZ they mean the heating circuit distributor, it does not belong there. It should be located centrally within the house so that the distances to the rooms are approximately equal.

Yes, I was mistaken about the FHZ. I was thinking of our apartment, where there is a specific regulation. For a house, there is always one per floor, ideally positioned centrally.

I have now looked up a few manufacturers and roughly marked the data. It should work, but I don’t think you can calculate solely based on the manufacturer’s dimensions. For the battery and inverter, I know you don’t need more space than the size of the devices themselves. Only one cable goes in. It’s similar with the electrical panels, where only a few more cables are involved. But for the air-to-water heat pump, ventilation, water, etc., how much space is needed for the installation and the pipes?