FOCUS 320 SBR Owner's Manual
4
RSF Woodburning Fireplaces
GENERAL SPECIFICATIONS
The FOCUS 320 SBR is environmentally friendly and meets the 2020 United States Environmental Protection
Agency (EPA) particulate emission standard with crib wood at an emission rate of 1.4 grams per hour.
Using data from a crib wood EPA emission tests and using CSA B415.1-10 calculations, it has an efficiency of 66%.
This has been established using the higher heating value of the wood.
Under the best burning conditions and using CSA B415.1-10 calculations, it has an optimal efficiency of 75%. This
has been established using the lower heating value of the wood.
It has been shown to deliver heat ranging from 10 000 to 50 000 BTU/h with an average of 35 000 BTU/h. Please
refer to the "Improving efficiency", the "Importance of draft", the "Burn Time vs Heat Output" and the "Fuel" sections
to better understand the various factors that influence the efficiency and heat output of your fireplace.
THE COMBUSTION CONTROL SYSTEM
Since the door is sealed, all combustion air must come through the fireplace's draft control. The draft control is an
assembly that increases or reduces the amount of air permitted into the firebox. A bi-metallic coil in the air control
allows more air when the unit is cold, and less air when the unit is hot, guarding against overheating. The air control
is fully automatic; there is no user access to the air control.
Control the fire as you would any normal fireplace, using one or two logs at a time for a smaller fire, or more logs
for more heat. Remember: when the fireplace is hot, the automatic air control will reduce the combustion air inlet
since the bi-metallic coil will shut the air control damper part way.
OPTIONS
Louver Options
There are different ways you can finish your fireplace
1
. You can choose to install louvers (black blade style FO-
F320SBRLB) or no louvers at all
2
(FO-F2).
If you choose to install your fireplace without any louvers, you MUST install the Clean Face Option (FO-F2) along
with two Gravity Vent Kits (FO-V2 or FO-V3). Gravity vent dampers CANNOT be installed on a Clean Face fireplace.
Furthermore, we recommend that you do not install any option requiring electricity or a thermal switch inside your
fireplace since it will be difficult to access those components after the fireplace facing is covered with non-
combustible materials. If you decide nevertheless to install electricity or a thermal switch in your Clean Face
fireplace, remember that you may eventually have to break through the non-combustible finishing to access the
electrical box or the thermal switch for servicing.
Gravity Vent Options
Gravity vent kits
3
allow hot air to be ducted from the fireplace to a room above or on the same level as the fireplace.
Clean Face installations require two gravity vents for heat circulation.
FO-V2
FO-VGC (grill only for FO-V2)
FO-V3
1
You can also refer to the configured option list on page 24.
2
Not allowed in a mobile home installation.
3
Not allowed in a mobile home installation.
