Heating area 800 - 1,700 Ft2
Size 27" W X 52 7/8" D X 48 3/4" H
Log length 22"
Average particulate emissions rate
(Average particulate emissions rate) (7)
0.229 g/MJ

From $3,599USD* MSRP

*Wood furnace only. Consult your dealer for a price that includes more options. Taxes, freight, installation and ducts not included.

  • Description
  • Options and Accessories
  • Specifications / Documentation
  • Maintenance instructions
  • Tech Support


The Cadillac of furnaces!

Advanced combustion technology and state-of-the-art design make the Caddy furnace a standout performer that meets the toughest combustion standards in North America. Tested to the CSA B415.1-10 standard and certified by the Environmental Protection Agency (EPA), the Caddy is the cleanest, most efficient furnace ever produced by PSG. It uses up to 30% less firewood and reduces particulate emissions by as much as 85%.

Enjoy the view of the fire through the Caddy’s glassed window and see the difference.

A unique heat exchanger system

The secret behind the Caddy’s outstanding performance is its built-in heat exchanger system. Hot gases from the combustion chamber run past the baffle into smoke ducts that sit above the chamber and make their way to the main smoke pipe. Instead of being lost up the chimney, heat is transferred quickly and efficiently by the ducts inside the furnace due to their ideal diameter and thickness. The optional fan then distributes heat throughout your home via your heating ducts.

Carefree cleaning

Say goodbye to complicated cleaning where you have to disconnect and move your furnace. The Caddy has a front access door that makes it easy to clean out the three smoke pipes above the furnace. Simply brush combustion residue into the combustion chamber and collect via the ash drawer.

Alternate source of heat

With Caddy series furnaces, you’ll always have an alternate source of heat to ensure the comfort and safety of your family. The Caddy comes in four different configurations: wood-only, wood+electric combo, wood+oil combo, and wood add-on furnace.



This furnace can be installed as a wood-only unit. Blower box and fan limit kit required for this configuration.

Wood Electric

Combined Wood + Electric

This furnace can be installed as a wood+electric combo unit to ensure your central heating keeps running even when you’re not there to add more firewood. Electric element (fan limit kit included) required for this configuration.

Wood Oil

Combined Wood + Oil

This furnace can be installed as a wood+oil combo to ensure your central heating keeps running even when you’re not there to add more firewood. Oil burner unit and blocked vent switch required for this configuration.

Wood Add-on

If you’ve already got an oil, gas, or electric central heating system but want to add the flexibility of wood, the Caddy wood add-on furnace is for you. This unit, which installs on either side of your existing system, uses the same controls and fan as your existing furnace, giving you a fully compatible wood+oil, wood+gas, or wood+electric combo system.

October Promotion

Offer valid from October 1st to 31st, 2015

Get a free start-up kit

Get a free start-up kit (AC01380) with the purchase of a Mini-Caddy furnace; wood only, combined or wood add-on

Claim promotion  >

*Before December 31st, 2015

92% of the last 50 homeowners who have registered their warranty are satisfied with this product.


I purchased the Caddy with the advice of a dealer in my hometown to replace my existing wood stove. They were very professional with the installation of my new unit. This heating unit is second to none, after only one week of burning, I have calculated that I will burn less than half the wood next winter. It should pay for itself in the next three years.

Bryan – Midland, Canada

Options and Accessories

Required Accessories

A - Wood Wood

Download the owner's manual >

From $679USD* MSRP

Download the owner's manual >

From $219USD* MSRP

B - Wood Electric Combined Wood + Electric

Download the owner's manual >

From $1,319USD* MSRP

Download the owner's manual >

From $1,369USD* MSRP

Download the owner's manual >

From $1,399USD* MSRP

Download the owner's manual >

From $679USD* MSRP

C - Wood Oil Combined Wood + Oil


From $2,169USD* MSRP

Download the owner's manual >

From $109USD* MSRP

Download the owner's manual >

From $679USD* MSRP


From $2,379USD* MSRP


Download the owner's manual >

From $219USD* MSRP


From $159USD* MSRP


From $169USD* MSRP


Find a complete line of accessories to help you get the maximum satisfaction from your heating appliance. For maintenance products, accessories, options or any other related products, SBI Heating Accessories is the ideal choice!

See all >

Venting products

Find a complete range of venting products for different fuel type meeting all applicable standards in the industry and a huge variety of accessories allowing in a simple, effective, and safe way the installation of heating appliances. In addition, for each venting product category, you can get kits containing all the necessary parts to complete your project.

See all >

Specifications / Documentation

Appliance performance

Fuel Wood
Volume of the combustion chamber 3.6
Average overall efficiency 71 % (1) 76 % (2)
Maximum input capacity (3) 310,000 BTU
Optimum efficiency (6) 86 %
Average particulate emission rate (7) 0.229 g/MJ

(1) Lower Heating Value of the fuel.

(2) Higher Heating Value of the fuel.

(3) Input value of fuel at 10 lb/cu.ft. loading density and dry energy value of 8,600BTU/lb.

(6) Optimum overall efficiency on low burn (LHV).

(7) Based on delivered heat output.

General features

Burner – location (exhaust pipe) Left
Burner – efficiency 82%
Burner – location Right
Clearance – Recommended (Maintenance) 24"
Filters – quantity 2
Recommended heating area (sq. ft.) 800 - 1,700
Maximum burn time 8 - 10 h
Maximum log length 22"
Flue outlet diameter 6"
Recommended connector pipe diameter 6"
Recommended connector pipe diameter (Wood-oil) 7"
Type of chimney 2100 °F (ULC S629/UL 103 HT)
Baffle type High heat-resistant C-cast
Approved for a mobile home installation No
Weight 564 lb (255 kg)
Blower 1/3 hp DD/ED, 4 speed/vitesses, 1300 CFM/PCM
Filters – dimensions (Width X Height X Depth) 14" X 25" X 1"
Air return plenum – dimensions (Depth or Height) 15 3/4"
Air return plenum – dimension (Width) 24 3/4"
Hot air plenum – dimensions (Depth or Height) 28 3/4"
Hot air plenum – dimension (Width) 24 9/16"
Overall dimension (Height) 48 3/4"
Overall dimension (Width) 27"
Overall dimension (Depth) 52 7/8"
Door opening dimension (Height) 10"
Door opening dimension (Width) 13 3/4"
Glass surface – dimensions (Width X Height) 12 1/2" X 10 1/8"
Door type Single, glass with cast iron frame
Glass type Ceramic glass
Firebox – dimension (Height) 16 1/8"
Firebox – dimension (Width) 17"
Firebox – dimension (Depth) 22 5/8"
Ash pan – dimensions 12" X 16" X 3"
Steel thickness – body 3/16"
Steel thickness – top 1/4"
Centre line of flue outlet to the side 12 7/8"
Centre line of flue outlet to the floor 43 7/8"
Clearance – front 48"
Clearance – back wall 24"
Clearance – side wall 6"
Clearance – opposite side wall 24"
Clearance – recommended for maintenance on option side 24"
Clearances – ducts <6'=6"; >6'=1"
Wood Add-on – location of the connection with existing furnace --> █ <--
Wood Add-on – air inlet duct dimensions (Height X Width) 14 1/2" X 22"
Burner – standard Beckett AFG
Burner – other brands approved Riello, Aero
Electric element – location Left
Electric element – recommended (maximum output) 18 kW
Electric element – other optional (maximum output) 15 kW ou 20 kW
USA standard (emissions) EPA
Canadian standard (emissions) CSA B415.1-10
USA standard (safety) UL 391 3e, Ed. rev. 1999
Canadian standard (safety) CAN/CSA B366.1-M91, CSA B212-93
Tested and listed as per applicable standards by An accredited laboratory
Warranty Limited lifetime

Maintenance instructions

How do I reduce the amount of charcoal my heater produces?

Appliances that are EPA or CSAB415.1 certified tend to create larger coal beds due to their higher efficiency. This can be controlled by the way you burn your appliance. After an overnight burn, you may have a more significant coal bed. Simply rake the coal bed forward and add a smaller piece of wood on top. Burn the appliance on a higher setting (air control fully open). This will pull more primary air into the firebox and will increase draft. The coal bed will burn down with the log. You may have to repeat this operation a couple of times before the coals are reduced. You are then ready to load your appliance with a larger fuel load.

Tech Support


Monday - Friday
8:00 a.m. to 12:00 - 1:00 p.m. to 5:00 p.m. (EST)

Is it recommended to keep the wood furnace's blower running continuously during winter in order to maintain a more even temperature throughout the house?

Indeed, installers often recommend this practice for oil, gas or electric central heating systems. However, it is definitely not recommended for a solid fuel fired furnace.

The heat generated by the wood furnace differs from other combustibles. As the wood load burns, the temperature varies lots based on the different stages of combustion. The temperature of the combustion gases must remain above the condensation point at all times in order to avoid the formation of creosote. The fan limit control will turn the blower off before the gases’ temperature drops under the condensation point.

In the case of a high efficiency furnace, stopping the blower will also help in keeping the firebox temperatures high enough for secondary combustion to take place. This is essential if you wish to have a clean burn and maximize the appliance’s efficiency.

Where on the hot air plenum of my wood furnace can I install the fan limit control?

The cold air forced through the furnace by the blower circulates around the firebox and is deflected towards the heat exchangers in order to transfer as much heat as possible. The hot air will then be distributed throughout the house.

The temperature inside the plenum will vary a lot from one spot to the other when the blower is running. The fan limit settings are determined in our factory such that the blower turns on when the temperature is sufficient to obtain the best heating efficiency and to turn off before the combustion gases cool down to the point where they could condense.

The proper position of the fan limit control is mentioned in all our manuals. The position of the fan limit control is of prime importance to insure the proper performance of the furnace.

Can I use my wood furnace during a power failure?

A wood furnace can be used in the case of a power failure without risking damaging the unit. The conception of the wood furnace is very similar to that of a wood stove. It is tested to withstand the intense heat of a wood fire, even if the distribution blower is not functioning due to the absence of electric current. The furnace’s efficiency will however be greatly reduced. Hot air will rise by gravity into the ductwork, but it will not be pushed into the rooms in an effective manner. In most installations, hot air circulating by gravity into the ductwork will be sufficient to keep the house warm enough to live in.

Should we install a barometric damper (draft regulator) on the exhaust pipe of a wood furnace?

In the case of older, conventional furnaces, the flame can easily reach the heat exchangers. When the installation or draft adjustment is inadequate, this tends to favor creosote build-up, which can be set on fire. Therefore, we recommend the installation of a barometric damper on this type of wood furnace.

For high efficiency furnaces (Mini-Caddy, Caddy, Max Caddy), the secondary combustion ensures that creosote is usually not a problem. The configuration of the firebox is such that the flame cannot travel to the heat exchangers. We do not supply any barometric damper with the furnaces for these reasons. However, a barometric damper is recommended in the case of excessive draft. Excessive draft occurs when combustion cannot be slowed down by closing the primary air inlet.

What will happen if there is a power outage and my wood furnace is in the middle of a combustion cycle?

It is important to note that the safety standard requires the simulation of a power outage and that the clearances stated on the unit’s certification plate reflect this abnormal situation.

A wood furnace can be used temporarily without electricity, taking into account the following guidelines:
#1- Remove the access panel to the fan in order to favor a natural circulation through the hot air distribution ducts.
#2- Manually position the air control plate slightly open (max 1/16"). An opening of only 1/8" is equivalent to a high intensity fire. Frequent monitoring is recommended to ensure that the furnace temperature is under control.
#3- Do not use more than 50% of the firebox volume. It is best to use a smaller amount of wood and reload more frequently to avoid the risk of overheating.

Why does the electric unit overheat and trigger the manual reset thermodisc.

Possible causes are the following:
  1. The air filters are clogged or very dirty.
  2. The blower does not start (the first sequencer does not close or the motor is defective).
  3. The cold air return volume is not sufficient.
  4. There is excessive static pressure (the distribution duct is too small or there are not enough outlets).
  5. The heat sensor is defective (rare).
  6. The insulation between the cold air return cabinet and the air distribution cabinet is cut too short and restricts or diverts the air flow at the exit of the electric element, thus creating artificial overheat (rare).

Why can’t my Max Caddy heat my house when my old 150,000 BTU oil furnace could do it without any problem?

An oil-fired furnace will reach its maximum heat output within minutes of start-up and keep that pace as long as there is a call for heat. A wood furnace will generate its maximum heat output only at the peak of the combustion cycle. Before that, it needs to build a momentum. Then, the heat output will slowly diminish as the wood load gets consumed.

The performance of the wood furnace will also be affected by the quality of the combustible, which is not as constant and predictable as heating oil. It will vary a lot depending on the density and moisture content. Numerous other factors may also affect the performance of the furnace, such as a poor chimney draft, dirty heat exchangers, low static pressure, etc.

Can the Caddy add-on be installed with an existing propane or natural gas furnace?

The certification allows the installation with the two types of gas. Therefore, the Caddy add-on may be hooked-up with either a propane or natural gas furnace, provided that the gas unit’s output power does not exceed 35.17 kW (120,000 BTU/h).

Is it possible to reduce the fan speed of my PSG furnace to reduce the noise level?

Except for the Max Caddy and the Caddy Alterna, the blower motor on your furnace has four speeds and the installer will have to select two, that is one speed for continuous air circulation during the summer months (low) and one speed for heating. The latter will be selected in accordance with the ducts design and the air distribution needs (normally med-low or med-high).

Electrically speaking, the circulation and heating speeds may be the same if you connect both the black and red wires on the same terminal. You should however take note that reducing the heating speed will reduce the heat exchange and the furnace’s temperature will increase accordingly, which could cause the furnace to overheat.

Should you choose to reduce the blower speed, be certain that the primary air intake damper closes completely when the thermostat is not calling for heat so that in the case of an overheat, the damper motor being deactivated, the furnace will go into slow combustion and the blower will be capable of cooling it down.

Less air flow through the electric unit of a wood/electric combination furnace could also increase the risk that the overheat protection on the unit will trip. This is especially true if the air filter is dirty. This situation will leave you with no electric heat until the sensor is manually reset.

How do I determine what furnace I need between the Mini-Caddy, Caddy and Max Caddy?

We have a “rule of thumb” that is not scientific, but that can give you a good idea on what PSG product you need to install in your house.

We assume that the house has an average insulation, quality windows and doors and 8 foot ceilings, with a location in an area where winter temperatures are comparable to most Canadian areas. We do not count the basement. Start by calculating the area of the main floor and add 50% of the area of a second floor when applicable. If you do not exceed 1,000 square feet, the Mini-Caddy is adequate. Up to 1,700 square feet, a Caddy installed and operated as recommended should satisfy your heating needs. Above 1,700 square feet and up to 3,000 sq. feet, the Max Caddy should be used.

Of course, nothing can replace a heat loss calculation conducted by a forced air heating professional to determine your exact heating needs and verify your existing ducting for compatibility.

Can I add an air conditioning unit to my PSG wood-heating system?

It is possible to use the furnace blower and duct system to install an air conditioning coil. A good control technician can easily connect it without interfering with the safe operation of the furnace. It is prohibited to install the air conditioning coil in the cold air return. The condensation produced will make the firebox rust.
In the case of a wood furnace, we recommend installing the AC coil downstream of the furnace, in a by-pass duct equipped with a damper that can be closed during winter to protect the AC coil from direct radiation of the furnace. In the case of a power failure, the distribution blower would cease working, which could cause excessive temperatures in the plenum that could cause the plastic pan of the AC coil to melt. In the case of a pellet furnace, the AC coil can go directly into the hot air plenum, provided that the plastic pan of the AC coil resists to at least 400 °F. A power outage would cause the pellet feed to stop, which would prevent an overheating of the hot air plenum.

My furnace is a wood electric combo. Is it possible to burn wood and run the fan with a generator in case of a power failure?

First, please note that your PSG furnace, if installed in accordance with the clearances mentioned in the manual, may be operated without the blower during a power outage. In such a case, it is recommended to open the blower access panel to help circulate hot air in the ducts by gravity. You also need to heat moderately. Note that the air intake damper motor will not work without power. It will need to be operated manually. It is possible to feed the blower with a generator, but you must make sure that the power from the house’s electrical panel is cut off to prevent conflict when the power is restored. This can be done automatically with the use of a suitable relay.