I would install a balanced ERV. You need to exhaust the bathroom and kitchen to ASHRAE 62.2 and install supply to the bedrooms and other living areas.
Yes it would be an independent system with duct work, and you would need to get creative on…"
"It sounds like your (100cfm) may be too low for a 5000sf house. Are you following 62.2? Also, Zehnder wattage should be around 24W from my knowledge. These units have been installed in Passive Houses. The sensible recovery seem low as well.
For too long there has been relatively little EE focus on multifamily, but some new programs have recently started. This group gives us a venue to share our experiences on cost effective audit & retrofit strategies and analysis tool needs.See More
"I don't think anyone can dispute the fact that the roof would be cooler, although putting a number on it would be difficult.
As far as using it to lower the cooling load and therefore the KWH, in my opinion would be risky and unwarranted.…"
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