How best to balance an HRV's intake and Exhaust?
I got my ecoEnergy Retrofit final energy evaluation back, it's a Canadian retrofit program. The house scored an 84 out of a 100. The evaluation report doesn't actualy provide an meaningful information, just the score which is used to calculate your rebate. Most of the marks were for the geoexchange system I put in!
I called up the evaluator and was able to get some useful information from him. The ACH50 was 1.85, the ACHnatural was 0.080 and the equivalent leakage was 72 in^2. It's not a passive house, two additions and a retrofit of the existing house.
And finally he told me that the HRV needs to be set at 82.8 cfm.
Unfortunately I wasn't home when the HVAC guys came to balance the HRV, my wife was! And her description of it makes it sound as though the balancing did not involve any measurement of air flow, that said I'm not sure she was down in the mini-basement to see what they did.
What is the proper way to commission an HRV to ensure that intake and exhaust are balanced and that the flow is set to my houses requirements?
There are five fresh air vents in the living areas and bedrooms, and two exhaust vents for the bathrooms. Also the mini-basement which is completely separate from the house has at least a fresh air vent and possibly an exhaust, might this unbalance the basement air pressure?
Posted Nov 20, 2009 3:44 PM ET
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