I have chronic illness from the air quality of my home, can you help determine if I need to replace the HVAC system?
...duct work? We of course can’t speak to how difficult or costly that would be without seeing it unfortunately. Here is out page on HRV maintenance, have a look and maybe you can find the problem -
HRV maintenance: How to keep your HRV Clean & Efficient
If your HRV or ducts were cleaned but they are still full of di...