I am having issues with noise and draft from the heat vents in my two smaller bedrooms when my HRV is running. I did some investigating and found that my HRV calls for the cooling speed (originally set to Medium-HI) on my furnace blower during its operation. I have now changed the cooling speed on my furnace control board to Medium-LO which has made the noise and draft in the smaller bedrooms are much more acceptable when the HRV is running.
Question is, are there any negatives in lowering my cooling speed on my furnace control board from the original Medium-HI to Medium-LO? I do not have an AC, so I think I should be okay?
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