Empire Stove St. Clair 4300 Zero-Clearance Wood Fireplace | WB43FP

Empire Stove St. Clair 4300 Zero-Clearance Wood Fireplace (WB43FP) A Large EPA 2020 Certified Zero-Clearance Wood Fireplace with Included Blower for 1,000–2,800 Square Feet The Empire Stove St. Clair 4300 is a zero-clearance wood-burning fireplace built into new construction or a framed chase, heating 1,000–2,800 ft² with up to 95,000 BTU/h from a 4.28 ft³ firebox behind double cast iron doors, with the blower, one-lever air control, and air wash system included. Key Features Recommended heating area of 1,000–2,800 ft² with up to 95,000 BTU/h maximum heat output Meets the EPA 2020 standard with non-catalytic secondary combustion at 1.6 g/h particulate emissions 4.28 ft³ firebox accepting logs up to 25" (16" recommended) with up to 11 hours of burn time Double glass doors with cast iron frames and a heavy duty double door latch Blower included to circulate heated air back into the room Simple one-lever air control and air wash system 5/16" thick steel top, ceramic refractory lining, and high heat ceramic baffle Zero clearance to the enclosure back, sides, and floor; vents with 8" factory-built chimney Requires a door overlay, a traditional faceplate, and the classic brick refractory to complete the fireplace, sold separately Product Features Zero-Clearance Installation The St. Clair 4300 installs in a framed enclosure with 0" clearance to the back, sides, and floor of the enclosure, with non-combustible front studs and headers and the space above the fireplace left empty to the required height. It is not approved for mobile home installation and has not been tested for installation inside a masonry chimney. The chimney system, hearth extension, and finishing materials are not included. Heating Performance for 1,000–2,800 Square Feet Rated to heat 1,000 to 2,800 ft², the St. Clair 4300 provides up to 95,000 BTU/h of maximum heat output and burns for up to 11 hours on a load of 25" logs, subject to installation and operating conditions. Included Blower The included blower, rated up to 176 CFM, increases airflow around the fireplace air jacket and improves hot air circulation in the room. An optional forced air distribution kit can carry heat to another room up to 50 feet away. EPA 2020 Certified Non-Catalytic Combustion This non-catalytic fireplace meets the EPA 2020 standard with an average particulate emission rate of 1.6 g/h and includes secondary combustion as a standard feature. Double Doors, One-Lever Control, and Air Wash Two glass doors with cast iron frames open on a heavy duty double door latch, a single lever adjusts the burn rate, and the air wash system keeps the 14 1/4" x 12 3/4" per door ceramic glass clear for a full view of the fire. Durable Steel Construction with Ceramic Refractory The 5/16" thick steel top is designed for extended heat radiation and lasting durability. High-density ceramic refractory lines the firebox for insulation, and a high heat ceramic baffle is built to perform at high temperatures. Style Options and Heat Distribution The St. Clair 4300 is completed with a black or nickel door overlay and the traditional faceplate and classic brick refractory. Optional accessories include the forced air distribution kit, the warm air circulation grill, and a 5" fresh air intake kit. Configuration and Accessories Per the Empire Stove 2026 price sheet and installation manual, the St. Clair 4300 includes the blower and requires a door overlay, a traditional faceplate, and the classic brick refractory, which are sold separately. Included Equipment Component Details Blower Included, up to 176 CFM, installed under the firebox Required Components (Sold Separately) Component Part Number Description Door overlay (choose one) WD5BL Door Overlay, Black Door overlay (choose one) WD5NB Door Overlay, Nickel Faceplate WF5TBL Faceplate, Traditional Refractory WR5C Traditional Refractory Optional Accessories (Sold Separately) Category Part Number Description Accessory WB2FA Kit, Forced Air Distribution Accessory WB2WG Grill, Warm Air Circulation Fresh air kit WA5FP Kit, Fresh Air Intake Product Specifications Appliance Performance Specification Value Fuel Type Dry cordwood (16" recommended) Recommended Heating Area 1,000 – 2,800 ft² Firebox Volume 4.28 ft³ Maximum Burn Time 11 h Maximum Heat Output – Dry Cordwood 95,000 BTU/h Overall Heat Output Rate (Min. to Max.) 16,610 BTU/h to 43,021 BTU/h (4.9 kW to 12.6 kW) Average Overall Efficiency – Dry Cordwood (HHV) 63.9% Average Overall Efficiency – Dry Cordwood (LHV) 68.4% Optimum Overall Efficiency (LHV) 69.7% Average Particulate Emission Rate 1.6 g/h (EPA) Average CO Output 157.4 g/h General Features Feature Specification Combustion Technology Non-catalytic Emissions Standard Meets EPA 2020 standard Air Control Single lever Blower Included (up to 176 CFM) Door Type Double, glass with cast iron frames Glass Type Ceramic glass Glass Viewing Area (W x H) 14 1/4" x 12 3/4" per door Steel Thickness – Top 5/16" Log Positioning East-west (16" north-south recommended) loading Recommended Log Length 16" Maximum Log Length 25" Firebox Lining Ceramic refractory panels Baffle Type C-Cast Air Wash System Yes Warranty Empire Limited Lifetime Warranty (see schedule) Fireplace Dimensions Measurement Size Overall Width (Including Standoffs) 50 3/4" Front Face Width 45 1/4" Overall Height 43 3/8" Depth (Framing Depth) 26 7/8" Overall Depth (Including Front Face) 32 1/4" Door Opening (Width) 33" Door Opening (Height) 12 3/4" Fresh Air Inlet 5" (bottom of the fireplace) Minimum Gap Between Fireplace and Facing 1/2" (1 3/8" maximum) Dimensions are taken from the Empire Stove St. Clair 4300 spec sheet and installation manual drawings. Shipping weight is not published by Empire Stove. Minimum Framing Dimensions Measurement Minimum Framing Width 50 3/4" Framing Height to First Header 43 3/8" Framing Depth 26 7/8" Framing Total Height 84" Additional Framing Width for Fresh Air Intake Kit 6" minimum Additional Framing Width for Forced Air Kit 10" minimum Framing dimensions are for reference; if a finishing material is installed inside the enclosure, add its thickness. Front studs and headers above the fireplace must be non-combustible, and the space directly above the fireplace must remain empty to the framing total height. Venting and Chimney Requirements Specification Requirement Flue Outlet Diameter 8" Chimney Diameter 8" Chimney Type CAN/ULC S629, UL 103 HT (2100 °F) factory-built chimney, 1" or 2" solid pack, from the manufacturers listed in the manual Minimum Chimney System Height 15' for a straight installation Maximum Chimney Weight Supported by the Fireplace 12' of 1" solid pack or 9' of 2" solid pack Listed chimney systems per the installation manual: DuraVent DuraTech, DuraTech Canada, DuraTech Premium and DuraPlus HTC; ICC Excel and RIS; Selkirk Ultra-Temp, SuperVent and SuperPro; Ventis and Nexvent (SBI Venting Division); Olympia Chimney; Secure Temp ASHT+; Metal-Fab Temp Guard. A chimney venting this fireplace must not vent any other appliance. Certifications and Installation Category Standard Emissions Standard EPA / ASTM WK47329 USA Standard (Safety) UL 127 Canadian Standard (Safety) ULC S610 Mobile Home Approved No Alcove Installation Not approved Masonry Chimney Installation Not tested; factory-built chimney only Minimum Clearances to Combustibles* Location Minimum Clearance Combustible Material Above the Door Opening (A) 6" Combustible Side Mantel from the Door Opening (B) 8" Side Wall from the Door Opening (C) 24" Wall in Front of the Fireplace 48" Ceiling from the Base of the Fireplace 84" Enclosure Back, Sides, and Floor 0" Chimney 2" Hearth Extension Installation Type R-Value Non-Combustible Floor Protection in Front Directly on the floor R 2.00 required 32" Raised less than 8" from the floor R 2.00 required 32" Raised base of more than 8" R 2.00 required 16" Raised between 8" and 12" from the floor R 1.00 required 20" Raised more than 12" from the floor No R-value required 16" The joint between the hearth extension and the fireplace must be protected over the full width by a bent, continuous piece of sheet metal of at least 2" (not included). *The certification label on the appliance and the current installation manual supersede published dimensions and clearances. Always follow the manufacturer’s installation instructions and applicable local codes. Corner installation, fresh air intake, and forced air kit framing details are specified in the installation manual. Manufacturer Notes Recommended heating area and maximum burn time may vary with location in the home, chimney draft, heat loss factors, climate, fuel type, and other variables. Efficiency and emission figures are measured under the applicable certification test methods; see the installation and operation manual for details. A door overlay, a traditional faceplate, and the classic brick refractory are required to complete the fireplace and are sold separately. Empire is committed to continuous product improvement; specifications may change without notice. Any installation must be done according to the data and drawings detailed in the installation and operation manual. About the Manufacturer Who Is Empire Stove? Empire Stove is the wood-burning stove, insert, and fireplace line of Empire Comfort Systems, Inc. of Belleville, Illinois. Its Gateway wood stoves, Archway wood inserts, and St. Clair wood fireplaces are made in North America and share a one-lever air control, a no-mess ash pan, and an air wash system designed for simple everyday operation. Built to Last Empire Stove appliances are constructed with thick 5/16" steel, lined with high-density firebricks, and fitted with a high heat ceramic baffle and high temperature ceramic glass, and they are backed by the Empire Limited Lifetime Warranty. Certification and Support Current Empire Stove wood-burning models meet the EPA 2020 emissions standard. Empire publishes installation and operation manuals, spec sheets, brochures, and test reports for each model, and supports owners through online product registration and its authorized dealer network.