Tag archive: cfm calculation

Bathroom Vent CFM Calculator | Bathroom Exhaust Fan Sizing

Bathroom vent CFM calculator uses 3 stage formula located below. It is based on HVI (Home Ventilating Institute) guidelines that recommend approximately 8 room air exchanges per hour for a bathroom under 100 square feet of area. CFM – cubic feet per minute – general term used to specify the amount of air that the…

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Home Maintenance Questions and Answers - Recent questions

Is there a vent for cathedral ceilings that butt up to a stone chimney?

When having the roofing replaced, the contractor said he would not guarantee the work because there were no...

need to move a double wall pipe 5 feet after i move it is it ok connetc it back in the attic .

what pipe would I use to make the connection in the attic.

Removal of mold in attic area.

Have mold in attic due to inproper vent installation on a bathroom vent,which has been corrected. However ...

Are darkened areas on roof plywood & rafters a concern?

Dark areas on roof plywood & rafters are on the North side only. These areas have increased in size over t...

Furance and Hot water tank Ventilation

I have a fairly new house with a high efficiency furnace and hot water tank in the basement that vents thro...