No HVAC Installers Install Dedicated Ductwork for ERV??
Some of you might’ve seen my previous post about communication issues with my builder about an ERV w/dedicated ductwork. We’ve had some good conversations about it, and I think have worked it out. Thanks to those of you who replied. Onto a new question.
The HVAC contractor he normally uses has never done an ERV with dedicated ductwork (and doesn’t seem interested). He’s called a couple of other companies so far and they all have said they don’t do dedicated ductwork for an ERV. I’ve even gotten in the act and called a couple over the last day. Same answer from all of them, “you don’t need dedicated ductwork; all you’re trying to do is get oxygen into your house if it’s spray foamed.” Per Martin’s article about ERV/HRV ducting (and others at JLC, finehomebuilding, etc), it seems to me that dedicated ductwork is the way to go. Is it that unusual to do dedicated ductwork for an ERV? I’m at the very northern edge of Climate Zone 3; ERVs are definitely not common around here.
And I guess my follow-up question is…how big of a deal should I make the dedicated ductwork? My builder has said he’ll make it happen, but what’s the cost going to be to wrangle an hvac company to do something they’ve never done before? If it matters, my HVAC unit is a Carrier Greenspeed Infinity (https://www.carrier.com/residential/en/us/products/heat-pumps/25vna0/ and https://www.carrier.com/residential/en/us/products/fan-coils/fe4a/).
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