Good Morning,
I live in a Northern climate where Winter temps reach as low as -40c/f during the winter. As such the house I bought has an HRV in it. I don't seem to have many knowledgeable HRV folks in the area that I've found but I'm hoping with some good advice I can direct them on what to change on the unit as I'm not good with ductwork.
Unfortunately it was not ducted properly where there are dedicated stale ducts into the bathrooms, kitchen etc. Its basically connected to the cold air return right beside the furnace (for stale), and a few feet from the top of the furnace plenum (for fresh).
I've noticed the a lot of hot air from the furnace gets pushed into the HRV fresh duct into the HRV and I'm doubting that is good for it and causes heat loss and coil temp imbalances?
So I had a couple questions:
1. Given the house is finished and I can't easily run lines to the bathrooms/kitchens to pull stale air from, what would be the next best configuration for the HRV to cycle air but not get interference from the furnace? Would it be better off just pulling stale air from the basement and placing the fresh supply into the cold air line for the furnace so it can circulate it? Or should it be completely removed from any furnace blower interference?
2. For the stale air I might be able to have someone run ducts to the bathrooms/kitchen if I can go with a flex 3" or 4" hose. Would that work or would the diameter be too small?
3. The outside exhaust for the HRV is an open vent with no flapper (like a dryer). Should I switch to an exhaust vent that has a flapper to prevent too much cold air from entering and freezing the coil?
Please let me know what you think might work in this scenario.
Thank you
I live in a Northern climate where Winter temps reach as low as -40c/f during the winter. As such the house I bought has an HRV in it. I don't seem to have many knowledgeable HRV folks in the area that I've found but I'm hoping with some good advice I can direct them on what to change on the unit as I'm not good with ductwork.
Unfortunately it was not ducted properly where there are dedicated stale ducts into the bathrooms, kitchen etc. Its basically connected to the cold air return right beside the furnace (for stale), and a few feet from the top of the furnace plenum (for fresh).
I've noticed the a lot of hot air from the furnace gets pushed into the HRV fresh duct into the HRV and I'm doubting that is good for it and causes heat loss and coil temp imbalances?
So I had a couple questions:
1. Given the house is finished and I can't easily run lines to the bathrooms/kitchens to pull stale air from, what would be the next best configuration for the HRV to cycle air but not get interference from the furnace? Would it be better off just pulling stale air from the basement and placing the fresh supply into the cold air line for the furnace so it can circulate it? Or should it be completely removed from any furnace blower interference?
2. For the stale air I might be able to have someone run ducts to the bathrooms/kitchen if I can go with a flex 3" or 4" hose. Would that work or would the diameter be too small?
3. The outside exhaust for the HRV is an open vent with no flapper (like a dryer). Should I switch to an exhaust vent that has a flapper to prevent too much cold air from entering and freezing the coil?
Please let me know what you think might work in this scenario.
Thank you
source https://hvac-talk.com/vbb/showthread.php?2223576-HRV-optimizing-duct-location-in-a-simple-fresh-stale-configuration&goto=newpost
No comments:
Post a Comment