When having your house remodeled there are so many ways one needs to “suck it up”; be nice to the contractor when he comes late, be nice to the fabricator when they charge extra, be nice to your family when they leave their stuff on the couch because they can’t get to the closet. But there is another way I recommend you consider to “suck it up” that will last long after the dust has settled and your have access to the whole house again – a new FAN.
A Whisperfit 110 cfm low-profile Panasonic fan was installed and vented in my remodel yesterday! We are all looking forward to using this fan. It will reduce the impact of moisture on the room, with a timed switch we can set it and forget it and it won’t suck all the heat out of the house. Fans are one of those modern conveniences that keep a remodeled bathroom fresh and sparkling.
Not all bathroom remodels include a fan, I strongly recommend homeowners consider installing a new fan or replacing their old fan. Fans are not original to older homes, operable windows often serve as the ventilation for the room. Some homes, including mine, have had fans added. But chances are due to the location, venting, and volume intake or cfm the existing fan is not performing adequately. The slow creep of mold in the shower alone demonstrates the air circulation provided by the window or existing fan is not adequate.
Existing Fan in upper right Patch for exterior at old fan
House ventilation, achieved through bathroom fans and kitchen vents is another area that Green Building have had a huge impact. Most new fans are very energy efficient and when installed to building code they limit heat lost from running the fan. I know you are all curious about the code for bathroom fans. It would not surprise me if you woke up at 4:00 am this morning wondering that very thing. Code in Oregon requires that fans be sized to the room, have a timed switch, the vent pipe should be 4″ rigid or 5″ flexible, and the fan should be vented through a roof cap (ie not hooked to an existing roof vent).
I usually recommend up-sizing the cfm of the fan (contractors I have spoken with agree on this). The chart will indicate a typical 5′ x 8′ bathroom needs a 90 cfm fan. But using a 110 cfm fan will remove the moisture quicker and maintain functionality if venting requires additional bends to exhaust the fan. Contractor’s may also avoid installing a new roof cap. It is extra work (and liability) to cut a hole in the roof for the cap, but hooking the vent pipe up to an existing roof vent means the vent is always open and warm air in the room has another avenue to escape.