We have two bathrooms that need wall exhaust vents. One bathroom, the Main Bath, currently has a broken one installed on the wall. The Master Bath has no vent. Neither bathroom has a crawl space big enough for a cieling vent.
416 cu ft = Main bath: 8'3" x 7'2" (7' ceiling)
222 cu ft = Master bath: 6'4" x 5" (7' ceiling)
Based on the general rule of thumb (1 CFM for every 10 sq ft) a 70 CFM fan should be OK for both. The sizing chart backs this up:
http://www.efi.org/factoids/bathroom_sizing.html
My father-in-law is going to be here in 2 weeks and help me install but I am reading up now so I can prep and know what I am getting myself into. I am pretty confident my father-in-law knows what he is doing (journeyman machine repairman, owns his own corn farm, did a fair bit of the electrical on his new house he built) and there is a good chance my brother-in-law (engineer who is months away from finishing his own home) i.e. I am going to be the tool holder and general planner. Very little risk of me electrocuting myself or doing something wildly wrong. Which is why I haven't done this project yet.
We are considering:
For the 416 cu ft Main Bath an
$195 Panasonic WhisperWall 70 CFM Wall Mounted Fan. Less than 1 sone. We have 6 kids and the bath is close to the dining table and kitchen so we don't want it loud and assume it will need to run a lot for at least 4 showers a day, toilet flushing, etc.
There is already a switch for the fan installed so I am guessing this will be very easy (another brother-in-law tested the wiring and said they still looked ok; the current fan is just very old, all metal, and looks like the bearing froze).
For the 222 cu ft master bath I am considering a $55 simple
Broan 70 CFM 3.5 Sone Wall Ventilator. Nothing fancy. This fan will need to be tied to the light switch. Looks like this Broan is under 60Watts from what I could tell but I want to be sure it won't be too much of a load.
Bonus: For the garage we are looking for an exhaust, too. It has been getting VERY hot. The side effect is the pressure from the hot air is pushing stale smelling air from the garage into the vent to the small attic crawl space above our bedroom closet and makes the bedroom stink of stale, warm air.
Not sure if a
270 CFM vent ($124) or something more radical like a
470 CFM ($79) would suffice. Don't need anything fancy like a sensor--we would just flip it on on hot days (early morning) or in the fall/spring when it gets really damp to help flush out some of the stale moist air. My thought is with a fan sucking the hot air out it would draw air out of the attic vent instead of the hot garage air pushing into the house through that vent.
Thoughts?
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