Hi folks, new to the forum. Looking forward to participating.
I was going to ask "what is the best way of wiring/running my ERV", but after searching some previous threads, I wonder if it is worth having at all.
First, some background.
We just built a new house in Central Massachusetts. Two-story, about 3000 square feet, four bedrooms, full basement, spray-foam insulation. Lots of good windows (Anderson 400-series) and 9 skylights. We have two independent HVAC systems (one for each floor) consisting of a propane-fired furnace/air handler/AC. We also have a central vent fan (FanTech) that vents all three bathrooms. The builder was going to put in a couple of fresh-80's to allow fresh air into the house (and relieve low internal pressure from the bathroom fans), but we didn't like the idea of spending so much money on building a tight house just to drill a few big holes in the wall. So instead he installed a FanTech SER1504 ERV. Since it was something of an afterthought, it was ducted into the cold-air return of the upstairs air handler, and wired so that the furnace fan would run whenever the ERV ran. The contol was a FanTech control, but it ran primarily off of humidity, when we wanted it to run for x minutes out of each hour.
Let's just say that I wasn't happy with the system. Because the contol was ineffective, we ended up leaving the ERV on all the time, so the furnace fan ran all the time. I suspect we could have used the fresh-80's and used less net energy.
I thought it would be nice to have the ERV kick on anytime the furnace fan did, since the times of year we are concerned about indoor air quality are the times of year that the windows are shut - the times we are running the AC or the heat. But I haven't figured out how to wire that setup. It isn't covered by the FanTech literature, and my HVAC guy wasn't too helpful.
But now I'm wondering - is this system (from a whole-house perspective) actually what we want? I'd love to hear opinions about how you would have designed the system differently, and what we might do now that we own what we do.
Thanks for taking the time,