HearthStone WFP 100 Zero Clearance Wood Fireplace

The HearthStone WFP 100 is a zero clearance wood fireplace with a big firebox and a front that looks carved from stone. Its cast iron face has a hand chiseled stone texture, in matte black or brown enamel, so it gives a new room the presence of an old hearth.

Inside, the 4.28 cubic foot firebox takes logs up to 25 inches loaded east-west. Because it's designed to be built near combustible materials, it can be framed into a wall without a masonry build. HearthStone says it exceeds 2020 EPA standards, and the blower is included.

Why Homeowners Choose the WFP 100

• A 4.28 cubic foot firebox. Plenty of room for a full load, with logs up to 25 inches east-west.
• Hand chiseled stone texture. The cast iron front brings a stone look to a factory-built fireplace, in matte black or brown enamel.
• Zero clearance framing. It's built to go near combustible materials, which opens up where a wood fireplace can go.
• Blower included. The blower is standard, rated up to 176 CFM.

This listing is the HearthStone WFP 100 zero clearance wood fireplace, model 8420, offered in matte black (8420-0010) and brown enamel (8420-0020).

Key Specifications

• Fireplace type: Zero clearance wood fireplace
• Efficiency (HHV): 63.9%
• Efficiency (LHV): 68.4%
• Particulate emissions: 1.6 g/h
• EPA certification: 2020 particulate emissions standard
• Overall heat output rate (min. to max.): 16,610 BTU/h to 43,021 BTU/h
• Firebox capacity: 4.28 cu ft
• Maximum log length: 25 in (east-west)
• Flue size: 8 in, top exit
• Chimney: UL 103 HT (2100 °F) / CAN/ULC S629
• Blower: Included (up to 176 CFM)
• Weight: 665 lb (including refractory slabs and faceplate)
• HeatLife (HearthStone rating): 10 hours

These are HearthStone's tested ratings. Real results depend on your room, the framing and chimney, your wood, and how the fireplace is run.

Ownership & Maintenance

The WFP 100 uses an 8 inch UL 103 HT chimney, and the installation should follow the manual closely. The included blower needs power to run. We offer support after the sale for Hearth Doctor customers.

Planning a new wood fireplace? Bring your ideas to our Auburn, Brunswick, and Yarmouth showrooms. We'll help with framing, chimney, clearances, and installation, and you can compare more HearthStone stoves and fireplaces.