Specifications

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Ventilation
Ceiling Fan Installation Tips
Ceiling Surface Mounted Fans
•Useforsinglepointorspotventilation
•Usetimersorspeedcontrolsforcontinuous
or intermittent whole house ventilation
•Onlyuserigidduct
•Avoidbendsandelbows
•Keepitshort
•Tiltducttotheoutsidefor
condensation control
•Sealallseams
Ductwork Tips and Techniques
•Userigidductwheneverpossibleforbetterairow
•Avoidusingexduct,butifyoudo,supportitwithstrapping
to avoid dips
•UseashortpieceofexductatthefanorHRVconnectionto
break vibration noise in the duct
•Insulateanyductsinun-conditionedspacestoavoid
condensation and energy loss
•Thinkinstraightlines—avoidasmanyelbowsaspossible
•Two45°elbowsallowbetterairowthanone90°
•Expandingtheductfrom4"to6"promotesbetterairow
and reduces noise
•Sealalljoints,seamsandconnectionswithmastic.
See page 64 for our mastic products. Use duct tape
for anything except ducts.
•Runductsininsidewallsifpossible.Makeductruns
continuous.WallcavitiesareNOTducts.
•Runductallthewaytotheoutsideofthebuilding.Attics,
basementsandcrawlspacesareNOToutsidethebuilding.
•Shorterrunsperformbetter—locateventilationequipment
to achieve short duct runs and good performance
Exhaust through a wall to avoid bends
BEST PRACTICE
NOT IDEAL
SIMPLE FAN SIZING TIP FOR A SINGLE ROOM:
•With+/–8’ceilingsandlessthan15equivalentfeetofduct,multiplythesquarefootageoftheroomby1.10andinstallthe
next size available.
Example:
80
squarefootbathroomx1.10=88squarefeet,solookfora90or100CFMfan.Iftheceilingishigherorvaulted,orthe
ductworkislonger,increaseyourselectionbyonesize.