Hello everyone,
I’ve heard different opinions about this. What do you do with the ventilation system in summer, turn it off or leave it running?
In the past few days, when it was warm outside, I noticed that heat was also coming in through the ventilation system. The supply air was about 24°C (75°F) even though the outside temperature was around 28°C (82°F), so it’s no surprise the house gets warm.
How do you handle this?
I’ve heard different opinions about this. What do you do with the ventilation system in summer, turn it off or leave it running?
In the past few days, when it was warm outside, I noticed that heat was also coming in through the ventilation system. The supply air was about 24°C (75°F) even though the outside temperature was around 28°C (82°F), so it’s no surprise the house gets warm.
How do you handle this?
K
Knallkörper28 May 2017 22:56Just share the datasheet and stop wasting time with unnecessary talk.
K
Knallkörper28 May 2017 23:11Grym schrieb:
Of course, I am talking about a central systemOkay. Then 90% might be about right. However, I would not underestimate the effect of even one Kelvin. The air exchange rate is probably around 0.5/h, meaning the room temperature will not rise that slowly, even with 90% efficiency. On the other hand, the much greater thermal mass of the building structure works in favor.
Knallkörper schrieb:
And of course, the original poster was referring to a decentralized system. I must have missed that. I don’t see it either. Where exactly does it say that?
Knallkörper schrieb:
Okay. Then the 90% figure might be accurate. Still, I wouldn’t underestimate the effect of even one kelvin. The air exchange rate is probably around 0.5 per hour, meaning the room temperature won’t increase that slowly even with 90% efficiency. Of course, this is balanced by the much higher thermal capacity of the building structure. I’m neither underestimating nor overestimating anything—I have actually calculated it.
0.08 kW, which is roughly the waste heat of a single light bulb distributed across the entire house.
Knallkörper schrieb:
Just bring the datasheet and stop talking nonsense. Decentralized:
Viessmann Vitovent 100-D: 91 %
Viessmann Vitovent 200-D: 90 %
Ventomaxx V-WRG Rondo Plus / LAL: 90 %
Lunos e²: 90.6 %
@Knallkörper Your argument is very embarrassing ...
And additionally, for central units such as Stiebel Eltron LWZ 280 and 180 with 90% and 93% (enthalpy) respectively, or Vaillant recoVAIR up to 98% (wow!), or Zehnder ComfoAir 200 with 95%, ... in my quick search I did not come across any device that does not reach 90%. However, they may exist.
