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  1. #1

    Confused Do we need the Trane Fresh Effects ERV for mechanical ventilation?

    Hi
    We live in the Pacific Northwest, own a 4,000sf home that was built in 1908 and was taken down to the studs. We're in the process of remodeling and have elected to go for the Trane XL20i heat pump AND the XC95m furnace. Since we're going for a 4 Star built Green certification and an Energy Star Northwest certification we have to have the house sealed up quite tight. The goal is 4.2 ACH50. It can get quite windy in this location and we have our share of damp days between Sept and May!

    Would you recommend we add the Trane Fresh Effects ERV or another unit (my understanding is the this would integrate more effectively with the communication components of the other Trane products, also looked at a Honeywell?

    Thanks for any guidance.

  2. #2
    Join Date
    Jun 2003
    Location
    Madison, WI/Cape Coral, FL
    Posts
    6,538
    The most common ventilation in the NW is a good exhaust fan like a "Quiet Vent" with Fresh 80s fresh air inlets. If there is a basement involved, maintain <50%RH with good dehumidifier like a small "Santa Fe". Nothing wrong with an ERV except with the mild temps you have, the pay back is never. During cool wet weather, maintaining +65^F is important to avoid high %RH in the conditioned space. If not heated or dehumidifier, the space may get musty from high %RH.
    Regards TB
    Bear Rules: Keep our home <50% RH summer, controls mites/mold and very comfortable.
    Provide 60-100 cfm of fresh air when occupied to purge indoor pollutants and keep window dry during cold weather. T-stat setup/setback +8 hrs. saves energy
    Use +Merv 10 air filter. -Don't forget the "Golden Rule"

  3. #3
    Thanks for your reply. There is a finished basement, fully insulated and sealed and conditioned. Are there multiple inlets with the Quite Vent, where would these need to be?
    Many thanks

  4. #4
    Join Date
    Jun 2003
    Location
    Madison, WI/Cape Coral, FL
    Posts
    6,538
    Quote Originally Posted by ElkAround View Post
    Thanks for your reply. There is a finished basement, fully insulated and sealed and conditioned. Are there multiple inlets with the Quite Vent, where would these need to be?
    Many thanks
    Most NW codes suggest the Fresh 80s be located in the isolated bedrooms and on in the open space. With a central air handler, a fresh make-up inlet on the return is allowed instead of the fresh 80s. In Arrid parts of the NW, no dehumidification is needed unless the space is +60%RH.
    Regards TB
    Bear Rules: Keep our home <50% RH summer, controls mites/mold and very comfortable.
    Provide 60-100 cfm of fresh air when occupied to purge indoor pollutants and keep window dry during cold weather. T-stat setup/setback +8 hrs. saves energy
    Use +Merv 10 air filter. -Don't forget the "Golden Rule"

  5. #5
    Thanks I'll look into these units and how they will look from the exterior. I was concerned about the payoff period for the ERV @ 2,500 bucks it could be years!
    Many thanks

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