ComfortBilt HP50S Pellet Stove

The ComfortBilt HP50S pellet stove is a slim, European-styled stove from ComfortBilt's HP line, about 20 1/2" wide. It heats up to 2,400 sq ft and delivered 17,430 to 35,433 BTU/h in EPA testing, with a tested efficiency of 80.4% (HHV) and EPA 2020 certification at 1.73 g/h. The 47 lb hopper runs up to 24 hours on the lowest setting, by ComfortBilt's rating. Automatic ignition, a room blower, a programmable control panel, an adjustable glass air-wash damper and an infrared remote are standard. It vents through 3" pellet pipe and is approved for mobile homes with an outside air connection. Choose Black, Arctic White, Burgundy or Dark Brown.

Who the HP50S is for

• Living rooms, cabins and smaller homes where floor space is tight and a narrow stove fits better.
• Buyers who want a lighter color: Arctic White is unusual for a pellet stove.
• Open main floors up to about 2,400 sq ft that need real output on cold days.

ComfortBilt's 2,400 sq ft rating assumes mild weather; climate, insulation and layout move the real number. The HP50S needs electricity, so keep another heat source for power outages.

Hopper, burn time and heat output

The 47 lb hopper takes a full 40 lb bag. ComfortBilt lists up to 24 hours on heat level 1; at higher levels in cold weather, plan on a fill once or twice a day, and expect pellet quality to move the number.

The HP50S's strength is its top end: up to 35,433 BTU/h from a narrow cabinet, with 80.4% efficiency. Its lowest output, 17,430 BTU/h, is higher than the HP21 (12,349) or HP22 (9,696), so in a small or well-insulated room it can run warm on mild days. Turn on ECO in Temp mode and the stove will shut off at your set temperature and re-light when the room cools (more restarts mean more igniter wear).

Controls, remote and thermostat

The control panel runs four modes: Manual (heat levels 1 to 5), Temp (set 61°F to 82°F and the stove adjusts itself from its room sensor), Weekly (a 7-day schedule with up to four periods a day) and Thermostat (a wired wall thermostat lights and stops the stove).

The included infrared remote handles on/off, Manual or Temp mode and the heat level or set temperature. For a thermostat that reads the temperature where you sit, add the ComfortBilt CB3002 wireless remote thermostat. For phone control, the BC Innovate WiFi module fits stoves with the newer 4-pin control panel; check the back of your panel before ordering.

HP50S vs. HP21 vs. HP22

Figures from each owner's manual:

↔ Swipe the table to see more →

Against the HP21, the HP50S has the same 2,400 sq ft rating with more top output, higher efficiency and a bigger hopper; the HP21 turns down lower for a smaller space. The HP22 is wider at 24" but covers up to 2,800 sq ft and has the widest output range of the three, from 9,696 to 40,689 BTU/h.

Venting and installation

The HP50S has a 3" exhaust and a 2" air intake. Connect a 3" appliance adapter to the exhaust, then run listed Type L or PL pellet vent; our ComfortBilt / DuraVent 3" pellet vent kit covers a standard through-wall install. ComfortBilt's main rules:

• Switch to 4" vent if the vertical run is over 12 ft, the home is above 5,000 ft elevation, or the run has more than one tee or more than 180° of elbows.
• Keep the run short: the maximum equivalent vent length is 17 for 3" pipe and 27 for 4" (a 90° elbow counts as 5 ft of horizontal pipe).
• No more than 4 ft of horizontal run. At least 3 ft of vertical rise is recommended so the stove drafts naturally in a power outage.
• Clearances to combustibles: 2" from the back wall to the stove back, 5" to the rear corners and 7" to side walls (see the clearance table below).
• Mobile homes need an outside air connection, and the stove bolted down and grounded to the chassis. Never install in a bedroom.

Our pellet stove venting guide walks through through-wall and vertical layouts.

Floor protection

Unless the stove sits on a non-combustible floor, it needs a non-combustible floor protector under the stove that extends at least 6" in front of the glass and 6" past each side, and 2" beyond an inside clean-out tee. At about 20 1/2" wide, the HP50S needs a pad at least 32 1/2" wide, so the ComfortBilt 36" hearth pad fits flat-wall installs with room to spare and the ComfortBilt 40" corner hearth pad fits corners. The HP50S + hearth pad combo bundles the stove and pad and saves $249. See all hearth pads or our hearth pad guide.

Why buy the ComfortBilt HP50S from StoveSource

• No Sales Tax in any state.
• Free shipping on orders over $250 to the lower 48. ComfortBilt stoves ship fast: Ships in 1–2 days.
• Free ComfortBilt B67C vent cleaning kit with your stove.
• Authorized ComfortBilt dealer, with ComfortBilt's warranty: 1 year on electrical parts, the burn pot and labor, and up to 5 years on steel parts.
• Price match guarantee.
• Help with sizing, venting and clearances: call 1-888-914-0022.