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TJERNLUND

Tjernlund Products is a manufacturer of draft inducers, inline duct fans, blower wheels, and related controls for combustion and ventilation systems. The company was founded in 1938 and is headquartered in White Bear Lake, Minnesota, USA. Tjernlund's product line addresses two primary needs: ensuring proper draft for combustion appliances and moving air in ducted ventilation systems. The draft inducer range includes pipe-mount and side-wall models for oil-fired furnaces, natural gas water heaters, and other appliances. These units are specified by pipe diameter, flow rate (cfm), static pressure, voltage, current draw, and whether a fan proving switch is included. For example, the D-3 pipe-mount inducer fits 5 in to 8 in pipe and operates on 115V AC at 60 Hz, drawing 0.96 A. The HSJ model is designed for 4 in pipe, delivers 110 cfm at 0.0 in SP, draws 1.26 A, and includes a fan proving switch; it is cETL Listed. Tjernlund also supplies air pressure switches, such as the PS1505 and PS1503, which are fixed set-point devices with auto reset, SPST contacts, 0.05 in wc set point, 1/4 in barb connection, and a conduit box enclosure, rated 115V AC. These switches are used to sense air pressure in HVAC systems and to prove fan operation. For speed control of ventilation fans, Tjernlund offers dial fan speed controls including the AS2SW3 (24V AC, 3 A, white steel plate, non-reversible, for AireShare series), SC-1 (115V AC, 3 A, silver steel plate, non-reversible, for PS1503 series), UCRT (120V AC, 16 A, blue steel plate, non-reversible, for RT series), and SCP (125V AC, 3 A, black plastic plate, non-reversible, for PS1503 series). These controls allow manual adjustment of fan speed in residential and light-commercial ventilation systems. 3G Electric supplies the Tjernlund line globally, offering plant engineers, maintenance managers, and procurement specialists access to draft inducers, pressure switches, speed controls, and replacement components. The catalog includes specification details such as voltage, current, set point, pipe size, flow rate, and enclosure type to support selection and cross-referencing. 3G Electric can provide quotes and availability for Tjernlund products, shipping to industrial and commercial sites worldwide.

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About TJERNLUND

Tjernlund Products is a manufacturer of draft inducers, inline duct fans, blower wheels, and related controls for combustion and ventilation systems. The company was founded in 1938 and is headquartered in White Bear Lake, Minnesota, USA. Tjernlund's product line addresses two primary needs: ensuring proper draft for combustion appliances and moving air in ducted ventilation systems. The draft inducer range includes pipe-mount and side-wall models for oil-fired furnaces, natural gas water heaters, and other appliances. These units are specified by pipe diameter, flow rate (cfm), static pressure, voltage, current draw, and whether a fan proving switch is included. For example, the D-3 pipe-mount inducer fits 5 in to 8 in pipe and operates on 115V AC at 60 Hz, drawing 0.96 A. The HSJ model is designed for 4 in pipe, delivers 110 cfm at 0.0 in SP, draws 1.26 A, and includes a fan proving switch; it is cETL Listed. Tjernlund also supplies air pressure switches, such as the PS1505 and PS1503, which are fixed set-point devices with auto reset, SPST contacts, 0.05 in wc set point, 1/4 in barb connection, and a conduit box enclosure, rated 115V AC. These switches are used to sense air pressure in HVAC systems and to prove fan operation. For speed control of ventilation fans, Tjernlund offers dial fan speed controls including the AS2SW3 (24V AC, 3 A, white steel plate, non-reversible, for AireShare series), SC-1 (115V AC, 3 A, silver steel plate, non-reversible, for PS1503 series), UCRT (120V AC, 16 A, blue steel plate, non-reversible, for RT series), and SCP (125V AC, 3 A, black plastic plate, non-reversible, for PS1503 series). These controls allow manual adjustment of fan speed in residential and light-commercial ventilation systems. 3G Electric supplies the Tjernlund line globally, offering plant engineers, maintenance managers, and procurement specialists access to draft inducers, pressure switches, speed controls, and replacement components. The catalog includes specification details such as voltage, current, set point, pipe size, flow rate, and enclosure type to support selection and cross-referencing. 3G Electric can provide quotes and availability for Tjernlund products, shipping to industrial and commercial sites worldwide.

Common Applications

  • Oil-fired furnaces — Tjernlund D-3 pipe-mount draft inducer for 5 in to 8 in pipe, 115V AC, 0.96 A.
  • Natural gas water heaters — Tjernlund HSJ pipe-mount draft inducer for 4 in pipe, 110 cfm, cETL Listed.
  • HVAC air pressure sensing — Tjernlund PS1503 or PS1505 fixed set-point switch, 0.05 in wc, SPST, 115V AC.
  • Residential ventilation — Tjernlund AS2SW3 dial fan speed control for AireShare series, 24V AC, 3 A.
  • Light-commercial ventilation — Tjernlund SC-1 or SCP dial fan speed control for PS1503 series, 115V/125V AC, 3 A.
  • RT series fan control — Tjernlund UCRT dial fan speed control, 120V AC, 16 A, blue steel plate.

Frequently asked questions

Common questions about TJERNLUND from 3G Electric.

What is the difference between the Tjernlund PS1503 and PS1505 air pressure switches?

Both the PS1503 and PS1505 are fixed set-point air pressure switches with auto reset, SPST contacts, a 0.05 in wc set point, 1/4 in barb connection, and a conduit box enclosure rated 115V AC. The primary difference is the manufacturer part number and SKU; the PS1503 is SKU 5C968 and the PS1505 is SKU 4C725. They are used in similar HVAC applications to sense air pressure and prove fan operation. When selecting, verify the required set point and electrical rating match your control circuit. Both are available from 3G Electric.

What pipe sizes does the Tjernlund D-3 draft inducer fit?

The Tjernlund D-3 pipe-mount exhaust draft inducer is designed for oil-fired furnaces and fits pipe diameters from 5 in to 8 in. It operates on 115V AC at 60 Hz and draws 0.96 A. The unit maintains consistent draft to improve combustion efficiency. Installation requires matching the inducer to the flue pipe size and ensuring the electrical supply meets the 115V AC requirement. For specific applications, consult the installation manual for clearances and wiring. 3G Electric stocks the D-3 and can provide current pricing and lead time.

Is the Tjernlund HSJ draft inducer listed by a recognized testing agency?

Yes, the Tjernlund HSJ pipe-mount exhaust draft inducer is cETL Listed. It is designed for natural gas water heaters with 4 in pipe, delivers 110 cfm at 0.0 in SP, operates on 115V AC, draws 1.26 A, and includes a fan proving switch. The cETL listing indicates compliance with applicable Canadian and U.S. safety standards. When specifying, confirm the listing is accepted by the local authority having jurisdiction. 3G Electric supplies the HSJ globally and can provide documentation on request.

Which Tjernlund speed control is compatible with the PS1503 series?

Two Tjernlund dial fan speed controls are compatible with the PS1503 series: the SC-1 (SKU 14U187) and the SCP (SKU 14U188). The SC-1 operates on 115V AC, is rated 3 A, and has a silver steel plate. The SCP operates on 125V AC, is rated 3 A, and has a black plastic plate. Both are non-reversible and designed for wall-mount installation. Selection depends on the available control voltage and desired plate material. 3G Electric carries both models and can assist with cross-referencing.

What is the current draw of the Tjernlund UCRT speed control?

The Tjernlund UCRT dial fan speed control (SKU 5PWE2) is rated for 16 A at 120V AC. It features a steel plate with a blue finish and a single dial switch. It is non-reversible and compatible with the RT series. The 16 A rating allows it to handle higher-current fan motors than the 3 A models. Ensure the connected fan motor does not exceed this rating. 3G Electric stocks the UCRT and can provide quantity pricing for OEM or MRO requirements.

What is the set point of the Tjernlund PS1505 air pressure switch?

The Tjernlund PS1505 fixed set-point air pressure switch has a set point of 0.05 in wc. It features auto reset, SPST contacts, a 1/4 in barb connection, and a conduit box enclosure. It operates at 115V AC. This set point is suitable for sensing low-pressure differentials in HVAC systems, such as proving fan airflow or filter status. The switch is not adjustable; if a different set point is required, select another model. 3G Electric supplies the PS1505 and can advise on alternatives.