Lead photovoltaic conduit from the utility room to the roof

Dear house building forum,

we have (unfortunately quite short notice) decided to install a photovoltaic system on the roof. Now the main problem is how we can route the 7-cm empty conduit from the utility room (ground floor), probably via the bathroom (upper floor), to the roof.

We have a total of 3 ceiling openings in the utility room:
- 30 x 20 cm for underfloor heating pipes
- 20 x 20 cm for SW downpipe DN 100 (probably no more space)
- 50 x 30 cm for TW, electrical, Post (what does Post stand for?)

Does the empty conduit fit in the 30/20 opening next to the heating pipes? That seems to me to be the best solution. How many pipes are needed for the heating, 2 or more? What diameter do the pipes usually have? We have an air-to-water heat pump and underfloor heating in all rooms.

Attached we have included the floor plan excerpts of the ground floor and upper floor for you.

We look forward to some input from you.

Hello fatbauj,
is the house already standing?

Regarding the utility room: I think there might still be space for the empty conduit in the 30/50. Post probably (archaically) stands for the telephone connection. What I notice is, where will the electrical distribution board (fuse box) and the main electricity connection box go? By definition, there should also be enough space around these. Do you have a network (planned, LAN)? The lines from the heating to the upper floor under the bathtub are ambitious, where is the HKV for the upper floor?

Upper floor: maybe the wall behind the shower could be doubled and all the lines laid in there?

We, for example, have a "thick" wall between the pantry and the ground floor bathroom; in it are all the electrical lines, water and sewage, heating, ventilation, empty conduits for photovoltaics, etc.

Hello blackm88.

Thank you for your feedback.

The house is not built yet. The ground floor has just been bricklayed.

Yes, you are probably right that the 30/50 opening is the most likely way through. The question is how to continue it upstairs. Unfortunately, the utility room is shorter than the bathroom on the upper floor. That’s why the pipe would come out right in the middle of the shower.

Electricity is drawn in the utility room at the bottom left. However, I think we are still flexible here until the upcoming electrical sampling. Do you have a recommendation?

Network cabling is planned. In what context do you see that?

Unfortunately, I don’t know where the heating control unit for the upper floor is planned. It can’t be in the utility room for both ground and upper floor, right?

Alternatively, a core drilling might be the only good alternative.

Thank you and best regards!

Yes, you are probably right that the most likely way through is the 30/50 recess. The question is how to continue it at the top. Unfortunately, the utility room is shorter than the bathroom on the upper floor. That's why the pipe would come out right in the middle of the shower.

Is that shown in the execution plan? All the lines from the 30/50 must lead somewhere.

Electrical is shown at the bottom left in the utility room. However, I think we are still flexible here until the upcoming electrical sampling. Do you have a recommendation?

Rotate 90 degrees and include the ceiling recess? Then there would be the possibility to run the lines along the interior wall. Possibly the bathroom would lose 10-15 cm in width.

Network cabling is planned. In what context do you see that?

Where is this planned in the utility room? Through which breakthrough are the network lines routed?

Unfortunately, I don’t know where the heating circuit distributor for the upper floor is planned. It can’t be in the utility room for both the ground and upper floors, right?

Is it shown in your execution plan?

Is that marked in the execution plan? All the lines from the 30/50 must lead somewhere

The utility room is 2.75 m wide. The bathroom on the upper floor is 3.50 m wide. The lines from the 30/50 then end up below the shower. I will clarify how the lines will be routed further.

Rotate 90 degrees and include the ceiling recess? Then there would be the possibility to route the lines along the interior wall. Maybe the bathroom would lose 10-15 in width.

In principle a good idea, but the ceiling recess can no longer be rotated as the intermediate ceiling will be delivered in the next few days.

Where is this planned in the utility room? Through which breakthrough do the network lines run?

I would have expected them to be routed through the 30/50 opening. But I will clarify again.

Is that marked in your execution plan?

Unfortunately not. I will also discuss this with our site manager.

Thanks for all your helpful inputs. As soon as I have feedback, I will get back to you.

Best regards