ᐅ Arrangement of the heat pump indoor unit, building entry point, and hot water storage tank in the utility room

Hello,

I am currently considering the best way to arrange the heating system (monoblock heat pump with indoor unit and separate domestic hot water storage) in the utility room to minimize space usage.

I have thought of two options. The dimensions are based on Buderus equipment:
- Indoor unit with integrated 70 L (18 gallons) buffer tank, approximately 60 × 60 × 140 cm (24 × 24 × 55 inches)
- Hot water storage tank with a volume of 290 L (77 gallons) and about 70 cm (28 inches) diameter

What is unclear to me is primarily where to place the heat pump’s house entry point. It goes through the concrete slab and requires a diameter of just over 20 cm (8 inches) to accommodate the medium pipe with supply and return lines as well as electrical cables. I would like to position it next to the multi-utility connection.

My question:
Is it possible to route the water lines from the entry point directly above the wall or ceiling to the indoor unit—crossing over the house electrical conduit—or is that too optimistic in terms of available space? Or should the lines run under the rough floor? Or would it be better to place them directly next to the indoor unit?

Which of the two options do you think is more practical from your experience?

Your plan is well thought out, but the space in the utility room will actually be tight once you try to fit the hot water tank, indoor unit, and pipe routing all at the same time. Ideally, the building entry point should be as close as possible to the exterior wall facing the heat pump (monoblock) – roughly where the plan shows the note “Wärmepumpe Einführung.” This way, you can keep the supply and return pipes short and straight.

Routing pipes through the wall or ceiling is generally allowed, as long as you consider pipe insulation and fire protection. Crossing electrical cables is not an issue if you maintain the minimum clearance (usually 10 cm (4 inches) or use a separating conduit). Running pipes under the unfinished floor is only practical if you don’t plan to install underfloor heating or installation layers there later – otherwise, space will be limited or costs will rise.

So, if you already have enough room next to the multi-utility connection point, that would be the optimal entry location. I would place the indoor unit right next to it and the hot water tank slightly offset – this way, you have the shortest routes and avoid conflicts with the household electrical system.

teddi86

In my experience, heating specialists keep the pipe runs within the house as short as possible. No matter how much you plan, that remains the case.