Vent Bathroom onto Mechanical Room to feed HPHW?
We are currently building a new house and will have a HPWH in the basement mechanical room. The mechanical room shares a wall with the basement 3/4 bath. We’re putting a shower in there for the occasional house guest and dog bath, but it will be used very sparingly. Would it make sense to vent that bathroom into the mechanical room rather than up and outside – thinking that if someone was showering the HPHW would be calling for heat and could make use of the limited warm/moist air and save an exterior penetration.
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