Tjernlund Products DJ-3C In-Line Draft Inducer w/Prover

Description

The Tjernlund Products DJ-3C is a professional-grade in-line draft inducer equipped with an integrated pressure prover (proving switch), engineered to establish and maintain consistent, reliable draft in combustion appliance venting systems. By mechanically inducing draft, the DJ-3C overcomes common venting challenges such as inadequate natural draft, negative building pressures, and long or restrictive flue runs — helping combustion equipment operate at peak efficiency and safety.

How It Works

The DJ-3C mounts in-line within the flue or exhaust vent of a compatible combustion appliance. Its integrated blower motor draws combustion gases through the venting system, creating a consistent negative pressure (draft) in the flue. The built-in pressure prover switch monitors draft conditions and verifies that adequate airflow is established before permitting the burner to fire — providing a critical layer of protection against flue blockage, backdrafting, and unsafe operating conditions.

Key Features

• In-line draft inducer design for straightforward installation within existing flue or vent runs
• Integrated pressure prover (proving switch) for verified draft confirmation prior to burner ignition
• Helps overcome negative building pressure, long vent runs, and restrictive venting configurations
• Promotes complete combustion and improved appliance efficiency
• Reduces the risk of backdrafting, flue gas spillage, and nuisance lockouts
• Built by Tjernlund Products — a trusted leader in combustion air and draft control solutions

Typical Applications

• Gas and oil-fired furnaces, boilers, and water heaters
• Combustion appliances with marginal or problematic natural draft
• Installations with long, horizontal, or complex vent runs
• Buildings with tight construction or negative pressure conditions

Why Choose the Tjernlund DJ-3C

Tjernlund Products has decades of experience engineering draft and combustion air solutions for residential and light commercial HVAC applications. The DJ-3C combines reliable motor performance with the added safety intelligence of a pressure prover, giving contractors and building owners confidence that combustion venting is operating correctly every time the appliance calls for heat.