Specifications

24
Select fan from sizing table
Special applications
Fireplaces with two ues:
When a replace is served by two ues of identical
sizes, two fans are recommended – one for each
ue. To size up such a system, take the total area of
the appliance opening and divide by two. Then select
fans as if there are two replaces each with one ue.
Example: A wood-red replace with 2,400 sq.in.
opening is served by two ues of each 8” x 12” or 9”
ID each. Select fans by using 2,400 sq.in. opening
divided by two or 1,200 sq.in. Using the sizing tables
two RS 14’s are needed.
In some situations, a single fan’s capacity may be
enough to handle a replace with two ues. If so, the
fan should be installed so it can pull equally from the
two ues. A good way to accomplish this is to install
the fan on a plenum box so two ues can vent into a
common area.
Fans used as a ventilator for odor control:
The fan can also be used for odor control. For sizing
purposes it should be sized for the application
following the above guidelines.
5.1.2 Stoves & Fireplaces Inserts
Sizing of mechanical venting for stoves and replace
inserts follow the same guidelines as above.
Measure the opening dimensions as shown on the
gure below:
Step 2 - Determine the size of the chimney opening
Follow the procedure and the table used for
replaces.
Step 3 - Check number of offsets and height
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.
Use this chart to select the fan size:
5.1.3 Other Applications
If you need a chimney fan for an application that is
not covered by the charts or if you are not sure about
what’s needed for your applications, please contact
your supplier or call ENERVEX Inc. for assistance.
Go to www.chimneyfans.com for an easy-to-use
sizing program
Opening in sq.in.
Max. 300 Over 300
6 RS9 RS12
7 RS9 RS12
8 RS9 RS12
9 RS9 RS12
10 RS9 RS12
Step 1 - Determine the size of the stove or insert
opening
Step 4 - Select a fan from the sizing table