Oil Furnace, Left Burner, Front Flue, 119,000 BTU

Williamson CLB-105-DD-F-S2 – Lowboy Oil Furnace, 119,000 BTU Input, Direct Drive Blower

The Williamson CLB-105-DD-F-S2 is a lowboy oil furnace engineered for residential applications requiring compact, high-output heating. With an input capacity of 119,000 BTU and output of up to 100,000 BTU, this model delivers dependable heating performance suitable for medium to large spaces.

Designed for front flue configuration and equipped with a multi-speed direct drive blower, the CLB-105-DD-F-S2 supports horizontal airflow in installations with limited vertical clearance. The furnace utilizes a high-efficiency 0.86 AFUE rating and features a heavy-gauge steel heat exchanger for longevity under continuous use.

Key Product Features

• Heating Capacity: 119,000 BTU input / 100,000 BTU output
• AFUE Rating: 86% efficiency – reduces fuel consumption
• Heat Exchanger: Welded steel construction for extended service life
• Combustion Chamber: Pre-formed slide-out chamber simplifies service
• Clean-Out Access: Spring-loaded ports allow quick internal inspection and maintenance
• Blower Motor: 1/2 HP multi-speed direct drive for adjustable airflow
• Flue Options: Front flue standard with optional top or side venting
• Burner: Factory-wired with plug-in control harness

Unit Dimensions

• Width: 21-1/2"
• Depth: 47-1/4"
• Height: 38-1/2"
• Flue Diameter: 6"

Installation Considerations

This furnace is designed for installation in basements, utility rooms, or other areas where vertical space is limited. It must be installed by a licensed HVAC technician to ensure compliance with oil burner code, fuel supply connection, and venting requirements. Proper air flow balancing and nozzle sizing are essential to achieve rated performance.

Application Suitability

The CLB-105-DD-F-S2 is well-suited for contractors working on retrofits or replacements in homes where existing ductwork and floor-level furnace clearances must be maintained. Its compact profile and field-serviceable components make it a practical solution for tight-space oil-fired heating systems.