- Options and Accessories
- Specs / Manual
- Support and parts
- Reviews (3)
Drolet is proud to present the HeatMax II, a completely re-engineered high efficiency wood furnace that meets the new EPA (CSA B415.1-10) clean-air standards. This enhanced furnace will provide considerable energy savings over a conventional wood furnace, using up to 30% less wood for the same amount of heat.
The HeatMax II is equipped with an adjustable rectangular hot air plenum that can accommodate 6 to 10, 6-inch diameter heating ducts. This adjustable plenum provides greater flexibility for an easier installation. Another key feature is an electronic probe, which measures the temperature in the plenum and varies the blower speed accordingly, assuring maximum comfort.
The Drolet HeatMax II: Sophisticated comfort control!
Options and Accessories
DIGITAL WALL THERMOSTAT
Fits on most thermostatically controlled pellet or gas appliances and furnaces. Temperature displayed in °C/°F. Includes 30 feet of millivolt wire.
From USD $59.00 MSRP
TRIPLE HOT AIR SUPPLY ADAPTER KIT
From USD $49.00 MSRP
Adhesives, gaskets and insulation
HIGH TEMPERATURE RED SILICONE (300 mL- 10.1 FL.OZ.)
A premium quality 100% silicone sealant that stays permanently flexible. Suitable for sealing around oven windows, flues on gas appliances, joints and metal stacks and ductwork. An excellent gasket maker to replace existing cork and felt rubber. Ideal for holding gaskets around stove and fireplace doors. Oxygen sensor safe. Withstands continuous temperatures up to 260°C or 500°F.
HIGH TEMPERATURE CLEAR SILICONE (300 mL - 10.1 FL.OZ.)
A premium quality 100% silicone sealant that stays permanently flexible. Suitable for sealing around oven windows, flues on gas appliances, joints and metal stacks and ductwork. An excellent gasket maker to replace existing cork and felt rubber. Ideal for holding gaskets around stove and fireplace doors. Oxygen sensor safe. Withstands continuous temperatures up to 204°C or 400°F.
STOVE AND FURNACE CEMENT (300 mL - 10.1 FL.OZ.)
Dries to seal cracks and joints to prevent smoke or air leaks. SBI Stove & Furnace Cement may be used in stoves, furnaces, boilers, fireplaces (all fuels), combustion chambers, firedoors, flue and chimney joints, brick linings, gasketing.
ASH VACUUM CLEANER
Conforms to UL STD. 1017. Certified to CSA STD. C22.2 No. 243-10. Avoid ending prematurely the life of your vacuum cleaner by using the ideal tool to suck up the completely cooled ashes of your wood or pellet appliance. Designed almost exclusively for ash collection, this ash vacuum cleaner will offer several years of service with proper care. Power: 800 W.
6" ROUND BRUSH WITH POLYPROPYLENE BRISTLES (3/8" NPT)
Ideal to prevent creosote build-up inside the chimney.
KEVLAR THREAD WOOD STOVE AND FIREPLACE GLOVES
Recommended for a clean and safe use of any type of wood-burning appliance. Fire-resistant kevlar sewings.
19" KEVLAR THREAD SEWN FIREPLACE GLOVES
Thermal protective gloves with long cuffs (19" or 48 cm):
- Ideal for stove, fireplace and barbecue
- Highly resistant to high temperatures
- Genuine leather and kevlar seams for increased durability
- Maximum protection against all heat sources (covers the entire forearm)
- Strong and flexible glove with reinforcement at the level of the hand
- One-sized with cotton lining for comfort
- Practical leather support buckle
Recommended for all wood stoves installed with a single wall stove pipe.
DIGITAL MOISTURE READER
Accurately and professionally measures moisture in wood logs.
Recommended for all wood appliances installed with a double wall stove pipe.
FIRE LIGHTING GEL (1 L - 32 FL.OZ.)
Recommended for lighting-up oil, wood, and pellet stoves. Leaves no residue. Odorless.
ONE-STRIKE FIRE STARTER
Specially treated fibrous wood prepared with paraffin wax, pre-cut into sticks with ignition head on the bottom of the sticks and striking surface on package.
WOOD AND PARAFFIN FIRE STARTER CUBES
• Only made from wood and paraffin wax without additional
chemicals (like formaldehyde)
• Safe, odorless, soot less, strong burning
• Easy to handle and easy to use
• Can be stored indefinitely and does not dry out
• Burn for 12 minutes
Specs / Manual
Appliance performance (3)
|Fuel type||Dry cordwood|
|Recommended heating area (sq.ft.) ()||1,000 - 2,500|
|Firebox nominal volume (cu. ft.)||3.6|
|Maximum burn time ()||10 h|
|Maximum input capacity (dry cordwood) (4)||310,000 BTU|
|Overall heat output rate (min. to max.) (5)||15,436 BTU/h (4.5 kW) to 49,638 BTU/h (14.5 kW)|
|Average overall efficiency (min. to max.) (6)||76.7 % (HHV) (7)||82.9 % (LHV) (8)|
|Delivered heat output rate (min. to max.) (9)||12,635 BTU/h (3.7 kW) to 44,857 BTU/h (13.1 kW)|
|Average delivered efficiency (min. to max.) (10)||62.7 % (HHV) (7)||68.3 % (LHV) (8)|
|Optimum efficiency (11)||84.9 %|
|Average particulate emissions rate (1) (2)||0.654 lb/mmBTU (0.282 g/MJ)|
|Average CO (12)||11.22 lb/mmBTU (4.81 g/MJ)|
|Average electrical power consumption (13)||250 Wh|
(1) Based on delivered heat output.
(2) This appliance is officially tested and certified by an independent agency.
(3) Values are as measured per CSA B415.1-10, except for the recommended heating area, firebox volume, maximum burn time and maximum input capacity. Performances based on a fuel load prescribed by the standard at 10 lb/ft³ and with a moisture content between 18% and 28%.
() Recommended heating area and maximum burn time may vary subject to location in home, chimney draft, heat loss factors, climate, fuel type and other variables. The recommended heating area for a given appliance is defined by the manufacturer as its capacity to maintain a minimum acceptable temperature considering that the space configuration and the presence of heat distribution systems have a significant impact in making heat circulation optimum.
(4) Input value at 10 lb/ft³ fuel loading density and dry energy value of 8,600 BTU/lb.
(5) Overall : Radiated and delivered heat together at 10 lb/ft³ fuel loading density over one total burn cycle.
(6) Efficiency based on radiated and delivered heat when allowing cycling from high to low burn to simulate thermostat demand.
(7) Higher Heating Value of the fuel.
(8) Lower Heating Value of the fuel.
(9) Delivered: Remotely provided to other rooms through ducting at 10 lb/ft³ fuel loading density over one total burn cycle.
(10) Efficiency based on delivered heat when allowing cycling from high to low burn to simulate thermostat demand.
(11) Optimum overall efficiency at a specific burn rate (LHV).
(12) Carbon Monoxyde. Based on overall heat output at 10 lb/ft³ fuel loading density.
(13) Unless stated otherwise, measures were taken directly at the main power source and include all electrical components present in the appliance.
|High-efficiency EPA certified appliance||Yes|
|Maximum log length||21"|
|Log positioning||Over depth|
|Flue outlet diameter||6"|
|Type of chimney||CAN/ULC S629, UL 103 HT (2100 °F)|
|Approved for an alcove installation||No|
|Approved for a mobile home installation||No|
|Shipping Weight||664 lb (301 kg)|
|Door type||Single, glass with cast iron frame|
|Glass type||Ceramic glass|
|Glass surface – dimensions (Width X Height)||14 3/8" X 10"|
|Glass air-wash system||Yes|
|Blower (hp / speed / CFM)||1/4 / 4 / 1,800|
|Filter – dimensions (Width X Height X Depth)||15" X 20" X 1"|
|Overall dimension (Height)||63 1/2"|
|Overall dimension (Width)||33 1/4"|
|Overall dimension (Depth)||49 1/8"|
|Door opening – dimension (Height)||10"|
|Door opening - dimension (Width)||13 3/4"|
|Firebox – dimension (Height)||16 1/8"|
|Firebox – dimension (Width)||17"|
|Firebox – dimension (Depth)||22 5/8"|
|Firebox lined with refractory bricks for better heat distribution||Yes|
|Stainless-steel secondary-air system improving gas combustion||Yes|
|Adjustable threaded legs||Yes|
|Steel thickness – body||3/16"|
|Steel thickness – top||1/4"|
|Easy-to-access ash drawer||Yes|
|Air return plenum – dimension (Depth or Height)||22"|
|Air return plenum – dimension (Width)||14 1/2"|
|Hot air plenum – dimension (Depth or Height)||18 1/2" - 26 1/2"|
|Hot air plenum – dimension (Width)||22 1/4"|
|USA standard (emissions)||EPA|
|Canadian Standard (emissions)||CSA B415.1-10|
|USA standard (safety)||UL 391|
|Canadian standard (safety)||CAN/CSA B366.1|
|Tested and listed as per applicable standards||By an accredited laboratory (CAN/USA)|
Minimum clearances to combustibles*
(Data expressed in inches. 1 inch = 25.4 mm)
|Single wall pipe||Double wall pipe||Single wall pipe||Double wall pipe|
|Clearance – back wall||16"||16"||16"||16"|
|Clearance – ducts||1" (Plenum = 5")||1" (Plenum = 5")|
|Clearance – top (measured from the platform on which the appliance is installed)**||69"||69"||69"||69"|
|Clearance – recommended for maintenance on option side||30"||30"|
|Clearance – front||48"||48"|
|Clearance – side wall||11"||11"|
|Clearance – opposite side wall||24"||24"|
* The information given on the certification label affixed to the appliance always overrides the information published in any other media (owner's manual, catalogues, flyers, magazines and/or web sites).
** Some appliances have been tested with a low ceiling. Before setting up your unit, refer to the installation manual.
Support and parts
Why does the glass get sooty?
Possible causes and solutions:
1- The moisture content of your wood is too high.
Solution: Make sure you use good, seasoned cord wood. The wood you burn plays an important role in the overall performance of your heater. Your wood should have been properly dried for approximately one year. Storage is also key. Wood that has been cut for one, two or even more years, will not necessarily be dry if it has been stored in poor conditions. Under extreme conditions, it may have rotten instead of drying. Smaller pieces of wood will dry faster. The wood should be stored in a place where the grass is not too long, and where the wind will be able to circulate between the logs. A 12-inch gap should be kept between the cords. The wood should be placed in the sunniest area and should be protected from the rain and snow on top, but not on the sides. Use a moisture reader to measure the moisture content of your wood. Ideally, it should be below 25%.
2- The logs are positioned too close to the glass and are obstructing the air flow that is necessary to keep the glass clean.
Solution: Make sure to keep a minimum gap of 2 inches between the logs and the glass.
3- The chimney draft is too weak.
Solution #1: In many cases, a weak draft is simply due to insufficient heat in the exhaust system. Build a small, intense fire, and leave the door ajar (never leave the heater unattended). Before inserting larger logs, use dry kindling to obtain a good bed of red embers. Gradually increase the size of the logs. Close the unit’s door when you reach a flue temperature of approximately 475 °F on the chimney thermometer. Leave the air intake fully open for approximately 15 minutes. Then, gradually close the air intake control. Note that there is no danger in letting the temperature inside the flue reach approximately 700 °F during the start-up. This is even favorable in order to properly start your heater. You must, however, avoid maintaining excessive temperatures (above the comfort zone on your thermometer) during a long period of time. Your chimney thermometer should be positioned on the exhaust pipe, approximately 18 inches above the unit.
Solution #2: Your heater may not have all the oxygen it needs to allow for a sufficient draft. You first need to insure that the room where the heater is located is sufficiently large and well ventilated. Open the nearest window by approximately 2 inches. If you notice a significant improvement, it is a sign that the unit needs more oxygen. The room may be too insulated or too small. Without an additional source of oxygen, the draft will remain weak and cause the glass stay dirty.
Solution #3: The chimney may be too short. In order to obtain a sufficient draft, your chimney must have a minimum height. Twelve feet (from the heater to the chimney cap outside the house) is a minimum. A height of 15 feet or higher is ideal.
Solution #4: Your exhaust system may be too tortuous or may lack a sufficiently steep slope. Ideally, your exhaust system should not have more than one 90° elbow. Furthermore, all horizontal sections should be as short as possible and have a minimum slope of ¼" per foot.
Solution #5: Your exhaust system may be oversized. When your chimney is oversized, the volume of air that needs to be warmed-up is larger. It is therefore difficult to reach temperatures that will allow for a sufficient draft. Most advanced combustion systems (those certified to EPA/CSAB415.1-10) have a 6" flue outlet (152 mm). If your exhaust system does not have a 6" diameter, a solution is to insert a stainless liner with a 6" diameter inside the exhaust system.
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.
Do I need an EPA certified or CSAB415.1-10 certified heater?
You first have to identify what your needs are. If you are looking for ambiance, a temporary heat source in a cottage or a camp, or a simple back-up heat source in case of power failure, you do not necessarily need to invest more money in order to buy an EPA or CSAB415.1-10 certified wood heater. However, if your goal is to heat on a regular basis, the extra dollars will prove to be a good investment. Furthermore, it must be noted that certified heaters release up to 90% less particles into the atmosphere, which makes wood a renewable and clean source of heat. As a result, if the style and size of the heater you are looking for is available in a certified version, it is highly recommended that you invest in this advanced combustion technology. You will help the environment and reduce your wood consumption by up to 30%.
NOTE: If you live in the United Sates, British Columbia, Ontario, Quebec, Nova Scotia, New Brunswick or Newfoundland, EPA certified wood heaters are mandatory. Exceptions apply for certain categories of products, such as decorative fireplaces. Certain municipalities may also have by-laws that require the installation of an EPA or CSAB415.1-10 wood heater, even though the province does not have an official regulation on wood heating. It must also be noted that in Canada, the CSAB415.1-10 Standard is equivalent to the EPA Standard. A wood heater that meets this Standard will generally comply with the regulation in place.
Why is the efficiency as per the EPA’s test data smaller than the publicized optimum efficiency?
EPA refers to the CSAB415.1-10 standard for the calculation of the appliance’s efficiency. The efficiency reported as per EPA’s directives consists of an average between four different burn rates, ranging from the lowest burn rate (air intake completely closed) to the highest burn rate (air intake completely open). The optimum efficiency that we publicize is the efficiency obtained according to the same test data, but for the low burn rate only. This efficiency is more realistic for a majority of users whose heating needs require that the unit be used to maximize burn times.
Why is the BTU according to EPA test data smaller than the one advertised?
You will notice a difference between the BTU output as per the EPA’s test data and what is advertised on our web site and/or product literature. The maximum BTU output we advertise is what will be obtained with a full load of seasoned cordwood inserted inside the firebox. The EPA output, on the other hand, is what has been obtained during emissions testing. The EPA test procedure requires that a special type of wood is used and positioned inside the firebox in a manner that does not represent the way the firebox volume would normally be utilized using seasoned cordwood. The EPA test load is typically much smaller. Hence, the BTU as per the EPA’s test data is reduced. The BTU output that should be considered by a normal user is the one we advertise for seasoned cordwood.
Can I install an EPA or CSAB415.1-10 certified heater on an 8-inch chimney?
EPA or CSAB415.1-10 certified heaters function best on a 6-inch chimney (interior diameter). The problem with an 8-inch chimney is that the appliance may struggle to heat-up the air volume contained inside the chimney. A hot chimney is required to create enough draft. Poor draft will inevitably lead to poor combustion, which will cause smoke roll backs, a dirty glass, lack of heat, and a large quantity of unburned fuel inside the firebox. It is therefore highly recommended installing a 6-inch liner inside the 8-inch chimney. This liner may be rigid or flexible.
jud yundt - 2016-03-29
I'm pretty happy with this product. It's design seems to burn wood very well. Cons- The blower seems to keep blowing long after it cools down. The biggest problem is that my furnace had a bad connection on a wire on damper motor and it quit working. I'm about to find out how well the warranty works.
Mathieu Prince - 2015-12-08
J'ai longtemps hésité avant de changer mon poèle à bois et aujourd'hui après quelques mois, je peux dire que le Heatmax est au delà de ce que j'espérais. Je brûle moins de bois et j'obtiens une plus haute efficacité énergétique.
Ethan Brand - 2014-04-01
Excellent furnace. Very well made, good heat output, easy to use.