andimann
2017-05-31 15:48:15
- #1
Hi,
we also had a Helios 370 planned, but at the last moment we changed it to a Zehnder 350.
My dealer apparently had quite a bit of trouble with the Helios systems in the past few months and in the end even had to remove a Helios and replace it with a Zehnder. There were problems with the heating coil at low volume flows.
Whether that’s true or he just makes more profit on Zehnder systems I can’t judge. In any case, the Zehnder was about exactly the same price, it was about the same.
But what I have read several times is that the Helios 370 becomes very loud in bypass mode, because the air is then routed through a smaller filter. That could be a problem for you, since you apparently are building without a basement.
Regarding the size: What air exchange rates do you all want to achieve? We have about 670 m^3 of ventilated space and the ventilation runs at 230 m^3/h, so a rate of 1/3. That’s more than enough!
A huge ventilation system in the basement is pointless if you don’t also have the appropriate piping for it. In other words, for exchange rates of about 1 you will need several outlets per room. Do you want that? And for what purpose?
Best regards,
Andreas
we also had a Helios 370 planned, but at the last moment we changed it to a Zehnder 350.
My dealer apparently had quite a bit of trouble with the Helios systems in the past few months and in the end even had to remove a Helios and replace it with a Zehnder. There were problems with the heating coil at low volume flows.
Whether that’s true or he just makes more profit on Zehnder systems I can’t judge. In any case, the Zehnder was about exactly the same price, it was about the same.
But what I have read several times is that the Helios 370 becomes very loud in bypass mode, because the air is then routed through a smaller filter. That could be a problem for you, since you apparently are building without a basement.
Regarding the size: What air exchange rates do you all want to achieve? We have about 670 m^3 of ventilated space and the ventilation runs at 230 m^3/h, so a rate of 1/3. That’s more than enough!
A huge ventilation system in the basement is pointless if you don’t also have the appropriate piping for it. In other words, for exchange rates of about 1 you will need several outlets per room. Do you want that? And for what purpose?
Best regards,
Andreas