Hello everyone, the title already describes the problem. Approximately 20% humidity in all living and sleeping rooms. We moved in about two weeks ago. That can’t be normal, right? I expected such low humidity only after 2-3 years, but not right from the start...
The first night in the house was really horrible. On top of that, we have been dealing with colds and coughing the whole time. We now have a humidifier running all night in the bedroom (starting in the evening, about 12 hours total) and wake up with around 35-40% humidity.
Could something be set incorrectly in the mechanical ventilation system with heat recovery, or is this low humidity normal in a new house?
What can we do? Apart from the bedroom, we don’t notice it being a problem in any other room. Enthalpy exchangers are supposed to increase humidity by a maximum of 5%, right?!
Thanks for your feedback and best regards
The first night in the house was really horrible. On top of that, we have been dealing with colds and coughing the whole time. We now have a humidifier running all night in the bedroom (starting in the evening, about 12 hours total) and wake up with around 35-40% humidity.
Could something be set incorrectly in the mechanical ventilation system with heat recovery, or is this low humidity normal in a new house?
What can we do? Apart from the bedroom, we don’t notice it being a problem in any other room. Enthalpy exchangers are supposed to increase humidity by a maximum of 5%, right?!
Thanks for your feedback and best regards
O
Oberhäslich10 Mar 2023 21:53How much does this enthalpy exchanger cost extra?
Y
Ypsi aus NI10 Mar 2023 22:46I can also confirm that it has been raining continuously here and the temperatures are gradually rising. This brings an average increase of about 5% more humidity.
Y
Ypsi aus NI10 Mar 2023 22:48Oberhäslich schrieb:
How much extra does this enthalpy exchanger cost?Around 2,000 to 3,000. I’m not sure how the warranty for the controlled ventilation system (mechanical ventilation with heat recovery) is affected if you install it yourself. But by sourcing the parts yourself and self-installing, you can probably save some money.R
RotorMotor10 Mar 2023 22:51I would say a heat recovery ventilator usually costs around 500€ extra.
If retrofitting, maybe around 800-1000€.
If retrofitting, maybe around 800-1000€.
Dogma schrieb:
P.S. Does your mechanical ventilation system shut down at -7 degrees? If so, why is that?
P.S.S. Why do you think a mechanical ventilation system always needs an earth-to-air heat exchanger (EWT)? There are other very good solutions that work just as well.Without an EWT, the ventilation system already reduces airflow at -1°C (30°F) and eventually shuts down. Unless you install a preheating coil in front...
Because all other solutions don’t work as well or as passively—quite simply.