ᐅ Heat meters required on every floor

Created on: 29 May 2020 10:48
S
S_t_e_p_h_a_n
Hello everyone,

I am renovating my single-family house. An apartment will be created on the first floor and attic that I want to rent out.

Is it sufficient to have a heat meter (underfloor heating) on the first floor and attic, but none on the ground floor?

It seems that one on the ground floor wouldn’t serve a real purpose since gas is also used for hot water.

The apartment also has separate water meters for hot and cold water. In my part, there is no additional meter for hot and cold water, only the main water meter.
S
S_t_e_p_h_a_n
2 Jul 2020 19:15
Hello, first of all, thank you for your answers.

To explain the system on my side, I have made a sketch.

So, this means I have to install a separate meter for each consumer connected to the boiler.
I have five meters then (four underfloor heating circuits and the water tank).

Now I can calculate exactly how much gas each consumer used based on the gas consumption.

That part is clear to me.

However, I don’t have a meter for the hot water installed. It is only installed for the tenant, on the upper and top floors.

Will this cause any issues?

Also, how do I calculate the hot water consumption if the solar system heated the water?

The heated water should not be charged to me. After all, I paid for the system.

Handgezeichnetes Haustechnik-Schema für Heizung und Warmwasser OG/EG
wrobel2 Jul 2020 20:48
Hello

This still doesn’t work. You need a water meter for each unit.
You could also measure the solar yield using a heat meter, but this requires precision.

I wouldn’t consider it appropriate to charge tenants separately for the solar yield.
The system is part of the heat generation, and I would treat it as included in the rent.

Olli
S
S_t_e_p_h_a_n
2 Jul 2020 22:41
Can I simply multiply the volume of hot water in cubic meters by a certain factor X? There must be standard values for the amount of energy consumed per cubic meter of hot water.
wrobel3 Jul 2020 00:38
Hello

Yes, Q = M x C x delta T

but you also need to know how much water was used

Olli
S
S_t_e_p_h_a_n
3 Jul 2020 09:03
Hello, the water consumption is measured for the tenant using cold and hot water meters.
If I don’t care about heat loss, can I then skip the heat meters for my area as well as the hot water tank?