Hello everyone,
We are currently dealing with heating. It will come down to a ground source heat pump. The underfloor heating and the pump now need to be optimally configured. The Energy Performance Certificate (EPC) here is more for official purposes rather than active use. So a proper hydraulic balancing is definitely mandatory.
Now it’s about the sizing of the heating system. For example, Stiebel Eltron offers a heating load calculation. However, this is probably not a "room heating load" calculation. I think it is more of an overall calculation. What is the difference between heating load and room heating load? Do both need to be calculated independently, or how should this be handled? Is it enough to have just a room heating load calculated?
I would appreciate some clarity in this jungle, thanks!
We are currently dealing with heating. It will come down to a ground source heat pump. The underfloor heating and the pump now need to be optimally configured. The Energy Performance Certificate (EPC) here is more for official purposes rather than active use. So a proper hydraulic balancing is definitely mandatory.
Now it’s about the sizing of the heating system. For example, Stiebel Eltron offers a heating load calculation. However, this is probably not a "room heating load" calculation. I think it is more of an overall calculation. What is the difference between heating load and room heating load? Do both need to be calculated independently, or how should this be handled? Is it enough to have just a room heating load calculated?
I would appreciate some clarity in this jungle, thanks!
S
Strahleman25 May 2020 22:30Usually, the heating installer provides the heating load calculation to the heat pump manufacturer (or wholesaler) and the pipe manufacturer for the underfloor heating. It is rarely checked whether this actually fits 100%. Often, there are excessive oversizing or poorly designed underfloor heating circuits. You might want to consider consulting an MEP engineer instead. They can usually calculate the heating load and room heating demand more accurately.
We had very good experience with a planner near Frankfurt. The difference between the pipe manufacturer’s design and the MEP engineer’s was significant — about 2 kW heating load in our favor.
The cost for the design of the heating circuits is under 200 euros and it is absolutely worth it to have the heating installer’s planning double-checked.
We had very good experience with a planner near Frankfurt. The difference between the pipe manufacturer’s design and the MEP engineer’s was significant — about 2 kW heating load in our favor.
The cost for the design of the heating circuits is under 200 euros and it is absolutely worth it to have the heating installer’s planning double-checked.
D
Daniel-Sp25 May 2020 23:31It would definitely make sense. The only question is whether the heating engineer hired by the general contractor (and not by the homeowner) will install the heating system and underfloor heating according to a "third-party" plan. Unfortunately, you have no control over this. It just needs to be properly clarified in conversation.
B
Bauherr am L26 May 2020 07:08Bauherr am L schrieb:
Thanks, so you perform a heating load calculation to select the appropriate heat pump. Later, a room-by-room calculation is done to design the underfloor heating system? For sizing the heat pump, a room-by-room calculation is not yet required? Thanks for the answers, but this question is still open.
Can you name the MEP planner or contact them via private message? They only need the floor plans, right (I’m not from Frankfurt)?
B
Brainstorming26 May 2020 08:03Bauherr am L schrieb:
The ERR is usually intended more for the authorities than for actual use.Does anyone actually check whether the ERR is properly installed? I would like to completely avoid using it in our new build.
B
Bauherr am L26 May 2020 08:05Brainstorming schrieb:
Does anyone actually check if the ERR is really installed? I would prefer to completely avoid it in our new build. Please start a new thread, I am trying to address completely different questions here.
But the issue of checking is definitely interesting. Really consider opening a new topic about it!
I am not familiar with the DIN standards on this topic. However, it is common that the heating load for preliminary sizing of the heat pump is usually estimated using various methods of varying accuracy. As a result, heat pumps are often oversized in practice.
A good approach to estimating the heating load can be found in another forum… try using a search engine and look for Ring trench collector. Sooner or later, you will come across the heating load tool.
The heating load is essentially the sum of the room-by-room heating loads, so you only know the actual heating load once each room’s load has been calculated. It should be noted that there are different calculation methods here as well, for example, whether solar gains are included (heating due to sunlight through windows).
If you want to dive into it, with some technical understanding, the component data, and an Excel tool, you can also calculate the room-by-room heating load yourself. The tool can also be found in the magenta-colored forum.
A good approach to estimating the heating load can be found in another forum… try using a search engine and look for Ring trench collector. Sooner or later, you will come across the heating load tool.
The heating load is essentially the sum of the room-by-room heating loads, so you only know the actual heating load once each room’s load has been calculated. It should be noted that there are different calculation methods here as well, for example, whether solar gains are included (heating due to sunlight through windows).
If you want to dive into it, with some technical understanding, the component data, and an Excel tool, you can also calculate the room-by-room heating load yourself. The tool can also be found in the magenta-colored forum.
Similar topics