Forge & Flame Absolute63

The Forge & Flame Absolute63 heats about 1,550–3,100 sq ft in most homes, depending on climate and layout, and Harman rates it as high as 3,400 square feet. Its variable-speed fans and multidirectional airflow vents send warm air out in several directions, so heat reaches past the front of the stove.

The Absolute63 holds 72 lb of pellets under an LED-lit hopper lid, so you can check the level at a glance. Its bottom-up feed system is designed to burn any grade of pellet fuel and allows 24-hour heating, and a large concealed ash pan makes cleanup quicker.

You use the EASY Touch Control, a single-screen panel with scheduling, diagnostics, cleaning prompts, and a fuel gauge, along with a wireless room sensor that reads the temperature where you sit. An outside temperature kit is the one add-on option, and the control reminds you when it's time to scrape the burn pot or empty the ash pan.

Only with an approved inverter/charger. A UPS such as the Tripp Lite INTERNET750U just gives the Absolute63 a smoke-free shutdown, but the Harman-approved Tripp Lite APS700HF and APS750 inverter/chargers can run it for up to eight hours on a 12-volt deep-cycle battery, after your dealer changes a power-failure setting.

It vents with 3-inch or 4-inch type L or PL pipe and can sit 2 inches from the back wall, 6 inches from a side wall, or 6.25 inches from the walls in a corner. The Absolute63 also fits an alcove at least 48 inches tall and no more than 36 inches deep.

Yes, the Absolute63 is approved for mobile and manufactured homes outside sleeping rooms, with a Harman outside air kit, listed L or PL pellet vent, and a ground to the home's frame. In any home it needs a non-combustible floor protector extending 6 inches to the sides, 1 inch behind, and 6 inches in front of the glass.

The Absolute63 has a 77% efficiency rating on the higher heating value, and it's EPA certified at 1.4 grams per hour under the 2020 particulate emission standard. Its exhaust sensing probe constantly monitors and adjusts heat output to hold your set room temperature.

The Absolute63 is the bigger of the two, with a 72 lb hopper versus 52 lb, and it heats about 1,550–3,100 sq ft in most homes versus 1,100–2,200 sq ft for the Absolute43. It comes in Black or Porcelain Majolica Brown, while the Absolute43 also offers Sand, and either model has to be ordered and installed by a dealer trained on it.