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Originally Posted by dperrin
I've been wondering the same thing myself. The ideal solution seems to be a whole home HVR (heat recovery ventilator) unit. Seems like most new construction in Canada requires these nowadays. But it wasn't so when my house was built in the 1950's and retrofitting one to your entire home seems like it will be very expensive. I've been doing a lot of searching and they do sell single rome HVR's in Europe that would be ideal for a fish room, but I haven't found anywhere online that offers shipping to North America. You could always just vent the room with a regular bathroom exhaust fan that is controlled by a humidistat, but I'm curious to know what solutions other people have come up with.
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I think one of the reasons HRV is becoming code in many jurisdictions for new construction is due to the air tight construction these days with vapour barriers etc sealing the entire dwelling from the elements. Like you, my home was built in the late 50's and I've been fence sitting about installing HRV as well. While the house is solid & well built, there are plenty of nooks & crannies for outside air to enter & indoor air to escape. Really not sure an HRV is going to do much for me. The climate is relatively dry here most of the year and the humidity indicator I have sitting near my display tank always shows in the normal range.
Planning a basement sump at some point & I think I'd go with a simple fan on humidistat as a first step if things got too damp before spending the $$$s on retrofitting a whole house HRV.