ComfortBilt HP21 pellet stove

Black freestanding pellet stove with a bright fire burning inside

The ComfortBilt HP21 has the bay view window that our customers love in a compact, pedestal design that fits nicely with all decors and room sizes. Its mid-range performance will heat a modest sized home or work space economically and efficiently. With all the engineering and construction found in our larger stoves, this model features:


  • Capable of 44,000 BTU output will heat a 2,400 ft² or more if temperatures are mild
  • EPA and CSA Certified to comply with all federal emissions mandates
  • Heat exchanger design and powerful room blower produce maximum heat from pellets
  • Easy to clean heavy gauge exterior
  • 40 pound hopper capacity; ashes fall automatically into a large removable ash pan
  • Pellets burn so completely that the ash drawer only needs emptying every two weeks
  • Five power settings allow up to 16 hours of continuous burning on lowest setting
  • Programmable thermostat allows constant temperature and economical pellet use
  • Rear mounted 3” standard exhaust port, and 2” standard air intake 
  • Exterior dimensions of unit are 23.5” wide, 24” deep, and 33” high with mounted controller


The HP21 Pellet Stove comes with a one-year limited warranty on parts and service.

Parts Available

Control Board

Green circuit board with black transformer, blue capacitor, and white connector on bubble wrap

Exhaust Fan

Silver six-point star-shaped metal part on a round plate, with a central knob and small holes around the edge

Auger Motor

Black electric motor with attached gearbox and protruding silver shaft on white background

Cast Burn Pot

Gray perforated metal vent cover with a rectangular opening and angled sides

Convection Fan

Silver cylindrical motorized conveyor roller with mounting brackets on a white background

Stainless Steel Burn Pot

Scuffed metal container with visible welds and a round fitting on the side

Gen 1 Replacement Igniter

Long-handled red-and-black tool with a gray connector on a white background

Vacuum Switch

Black round electronic component with mounting tabs and a white label on a white background

Gen 2 Replacement Igniter

Black-handled double-prong tool with a curved metal tip on a white surface

Gen 2 Igniter Bracket

Black ring clamp with a silver screw on a white background

Gen 3 Replacement Igniter

Black rectangular sensor with white connector and curved cable on a light background

Gen 3 Igniter Mounting Set

Two silver bolts, a red washer, and a translucent cylindrical spacer on a white background

Main Power Switch

Black IEC power inlet with an on/off rocker switch on a white background

Proof of Fire Switches

Two white ceramic electrical sockets with metal contacts on a white background

Hopper Lid Safety Switch

Small electrical microswitch with a metal lever arm, white body, and black actuator on a plain background

Control Panel

Black electronic control panel with LCD screen and arrow buttons on the right, plus power and function buttons on the left.

Remote Control Thermostat

Wireless remote control system with receiver box, handheld controller, and yellow batteries on white background

Parts Care Package

Orange “Parts Care Package” text over a gray oval with faint mechanical parts in the background

32LB Hopper Extension

Open black hinged box with 18