ᐅ Is a Tight Pipe Spacing for Underfloor Heating Not Possible with a Gas Heating System?
Created on: 2 May 2013 20:23
M
Mecc
Hello dear forum,
while we are waiting for the next draft of our house, I am continuing to research the heating system. In an earlier thread, I mentioned that we decided on a gas condensing boiler and 15% better insulation, so a standard new build.
Now we asked our general contractor whether the underfloor heating could be designed with a heat pump-compatible low flow temperature and thus a higher pipe spacing density (for a possible switch to a heat pump later on). He said that a flow temperature below 40°C (104°F) doesn’t make sense with a gas condensing boiler. I find that hard to believe—I’ve read a lot online suggesting that the condensing effect is even more effective if the return temperature is especially low. And that can only be achieved with a correspondingly lower flow temperature, right? Or am I mistaken here? I was thinking it would be possible to set a future-proof flow temperature as a fixed parameter in the heating design. I’d appreciate your advice!
Best regards,
Mecc
while we are waiting for the next draft of our house, I am continuing to research the heating system. In an earlier thread, I mentioned that we decided on a gas condensing boiler and 15% better insulation, so a standard new build.
Now we asked our general contractor whether the underfloor heating could be designed with a heat pump-compatible low flow temperature and thus a higher pipe spacing density (for a possible switch to a heat pump later on). He said that a flow temperature below 40°C (104°F) doesn’t make sense with a gas condensing boiler. I find that hard to believe—I’ve read a lot online suggesting that the condensing effect is even more effective if the return temperature is especially low. And that can only be achieved with a correspondingly lower flow temperature, right? Or am I mistaken here? I was thinking it would be possible to set a future-proof flow temperature as a fixed parameter in the heating design. I’d appreciate your advice!
Best regards,
Mecc
Mecc schrieb:
...I understand that you have to pay for planning services. We are not opposed to that! But I would just like to know beforehand whether it is possible or not, before I start a huge undertaking. In principle, it is not a wrong decision to size the heating surface for future heat generators with reasonably low supply temperatures. Of course, this sets certain limits with the currently chosen heat generator. Mecc schrieb:
...Or is the general contractor just saying something that suits them better? Is a heat pump-optimized underfloor heating system with gas condensing boiler significantly more expensive (several thousand €uro), or does it just need to be well planned with some technical additions? How many thousand euros more depends entirely on the supplier (seller of the solution). Whether this is actually justified can only be assessed by the client ;-) Best regards