QUICK SIZING....  STEP 1      Determine the type of opening, measure and calculate.....

One-sided		Two-sided (See-through)		Corner		Three-sided		Free-standing		Free-standing Round
A x B		1.5 x A x B		A x B		( A + B ) x C		1.5 x A x B		1.185 x A2

CONVERSION OF Rectangular / Square to Round Flues

Note: The RED background indicates that the fan will most likely create some air-flow noise due to a high air velocity in the chimney.
The BLUE background indicates the fan base will not cover the chimney opening and a special adapter must be used.

Check that there are no more than 2x90° elbows and no more than 30’ of height. If there are more than 2x90° elbows, use a bigger fan.

The "opening in square inches" refers to the fireplace or appliances over-all face opening. Example :  In a small wood burning fireplace, if the hearth opening is 18" x 24" with an 8" round ( INSIDE MEASUREMENT ) clay liner in a brick and mortar chimney we would... Multiply the length and width, in this case 18" x 24" = 432 square inches.  Being less than 600, on the wood burning chart above, follow the column to the 8" flue size.  Highlighted in orange, the chart shows an RS 9 to be the proper size chimney fan for this application.

Note: The RED background indicates that the fan will most likely create some air-flow noise due to a high air velocity in the chimney.
The BLUE background indicates the fan base will not cover the chimney opening and a special adapter must be used.

Check that there are no more than 2x90° elbows and no more than 30’ of height. If there are more than 2x90° elbows, use a bigger fan.

Gas fireplaces will need additional controls...

PDS (Proven Draft Switch) Safety control that senses a draft.  A pressure sensor that ties into the log set or appliance controls and would shut the gas off if the draft became negative.

ADC 100  A pre/post purge control that would extend the the fan cycle before and after gas is present for a fireplace or appliance.

MFD Mechanical Fireplace Damper. Prevents excess heat from escaping through the chimney when the fireplace is not in use.

Wood stoves, coal stoves and fireplace inserts   Stoves Fireplace Inserts   Door Opening in square inches     A x B Flue Size Max. 300 OVER  300 6 RS 9 RS 12 7 RS 9 RS 12 8 RS 9 RS 12 9 RS 9 RS 12 10 RS 9 RS 12

Check that there are no more than 2x90° elbows and no more than 30’ of height. If there is more than 2x90° elbows, use a bigger fan.

Fan Specifications

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1 Junction Box  2 Conduit/cord  3 Motor  4 Motor Housing  5 Cooling Plates  6 Bird Screen  7 Base Plate  8 Locking Nut  9 Inlet  10 Axial Vane  11 Hinges  12 Capacitor  ( inside J-box )    Capacitor  Wiring Diagram

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Need Exhausto fan parts... or a replacement motor for an Exhausto fan?

Is it Exhausto Exodraft or Enervex? Exhausto is now Exodraft, distributed as Enervex.   Read more...  Prior to 2012 all fans and parts were identified as Exhausto, made in Denmark. Name has changed... parts are the same.  Exhausto Part Identification.   We only supply genuine Exhausto fan motors, fan blades and parts.

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Call 1 800 685 8263 or e-mail us with your specs.

  We will be happy to help you choose the correct size chimney fan for your application.

Go to :  Chimney Fan Home Page	Go to :  Chimney Cap Selection
Go to :  Chimney Fan Warranties	Go to :  Downdraft & Wind Loading Explanations.

 

Click to learn more about Enervex, formerly Exhausto, Chimney Fans visit the Chimney Fan Source @ www.chimneyfansource.com

 

 

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