Venting Control & Accessories

Venting Control & Accessories includes controls, dampers, power venting equipment, and related kits used in commercial heating and HVAC work. These products help technicians and facility teams manage vent-system draft, combustion-air delivery, appliance venting, fresh-air intake, and selected air-conditioning protection applications for furnaces, boilers, water heaters, and forced-air systems.

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Helpful Buying Guide

Choose venting controls for the compatible appliance and operating need

Start by identifying whether the application needs draft management, powered venting, combustion air, an automatic damper, a matched control kit, fresh-air intake control, or evaporator coil freeze protection. Then compare the stated fuel type, voltage, equipment series compatibility, vent or tubing size, and included components before selecting a product.

Visual Guide

Popular examples in this category

24 in. Double-Acting Draft Control24 in. Double-Acting Draft ControlWBB794665Commercial Combustion Air Supply System, 900,000 BTUCommercial Combustion Air Supply System, 900,000 BTUWBB794668Universal Wiring Kit for GVD Series Dampers, 8 ftUniversal Wiring Kit for GVD Series Dampers, 8 ftWBB1191180Oil Heating Appliance Venter-Burner Control KitOil Heating Appliance Venter-Burner Control KitWBB794604
Use Cases

Match the control to the job

Draft controls are intended for compatible gas-fired furnace and boiler venting applications. Power venting equipment and control kits support selected gas- and oil-fired heating setups, while combustion-air systems address confined or inadequate-air locations.

How to Choose

Confirm the connection details

Compare appliance fuel, control voltage, compatible venting equipment or damper series, and the required size. Examples represented here include 12-inch and 24-inch draft controls, a 6-inch power venter, 10-inch and 12-inch gas vent dampers, and a freeze control for 7/8-inch outside-diameter tubing.

Applications

Support heating and HVAC operation

Products represented in this category are used with furnaces, boilers, water heaters, conversion burners, forced-air HVAC systems, mechanical rooms, boiler rooms, and air-conditioning evaporator coils.

Additional Information

Review included control features

Available features include pressure switches, post-purge timer controls, blocked vent or spillage switches, tubing, connectors, keyed wiring connections, hold-open switches, test mode, and thermostat-activated operation.

0.01 to 0.1Draft adjustment range

Stated adjustment range for the double-acting draft controls.

900,000 BTUCombustion air system

Stated capacity for the commercial combustion air supply system.

416,000 BTUPower venter

Stated capacity for the 6-inch power venter.

35°F / 50°FFreeze control switching

The freeze protection control opens at 35°F and closes at 50°F.

Comparison Guide

Compare the main product types

Use this overview to narrow the selection to the function and compatibility details described for the application.

Product typeBest matched toKey selection details
Draft controls and automatic dampersCompatible gas appliance vent systems, including furnaces and boilersChoose by stated diameter, draft-control need, ignition or appliance compatibility, and automatic damper features.
Power venters and control kitsCompatible gas- or oil-fired heating equipment using power ventingCompare fuel type, 24V or 120 VAC control requirements, SWG Series compatibility where stated, and included switches or connections.
Air and protection controlsCombustion-air, fresh-air ventilation, and evaporator-coil applicationsCompare the airflow function, forced-air system compatibility, thermostat or schedule control, and tubing fit for freeze protection.
Planning Guide

Plan the right fit before choosing

Plan the application

Identify the venting or airflow function needed

Choose based on the specific operating need. Double-acting draft controls help manage draft and relieve low positive vent-system pressure. Power venters draw combustion gases through an outside wall, while combustion-air supply systems bring outside air into the structure when there is a call for heat.

  • Use automatic gas vent dampers for compatible appliances that need the vent to open during operation and close during off cycles.
  • Use fresh-air ventilation control with compatible forced-air systems to operate an intake damper and activate the main HVAC blower when needed.
  • Use evaporator coil freeze protection control for compatible air-conditioning service applications.
Check compatibility

Compare fuel type, controls, and physical fit

Compatibility differs by product. Some items are intended for gas-fired equipment, while others support oil-fired or both oil- and gas-fired applications. Control kits are represented for 24V gas appliances and oil-fired appliances using 120 VAC controls, and several kits are designed for compatible SWG Series power venters.

  • Confirm whether the appliance uses natural gas, LP gas, oil, or the stated gas-fired application.
  • Match the required control arrangement, including 24V or 120 VAC where specified.
  • Verify the listed equipment relationship, such as GVD Series dampers or SWG Series power venters.
  • Check the stated vent, damper, or tubing size before purchase.
Consider operating and installation features

Select features that support the listed setup

Automatic dampers in this category include dual safety switches that allow burner firing only after the damper reaches the open position. Certain products also offer keyed connectors to help prevent incorrect wiring, hold-open switches for troubleshooting, and included installation components.

  • Pressure-switch operation can signal the appliance after airflow is established.
  • Post-purge timer controls are included in selected power-venter control kits.
  • A normally closed damper arrangement can help limit heat, conditioned-air loss, and cold-air entry during off cycles.
  • A keyed harness plug or wiring connector supports correct connection orientation.
FAQ

Common questions before buying

What is a double-acting draft control used for?

It helps manage venting draft and relieve low positive vent-system pressure in the stated compatible gas-fired furnace and boiler applications.

How do automatic gas vent dampers operate?

They open during a call for heat to allow flue gases through the vent and close during off cycles to limit airflow through the vent.

What should I check before choosing a power-venter control kit?

Check the appliance fuel, required control voltage, and whether the setup uses a compatible SWG Series power venter. Review the included control components as well.

What does the fresh air ventilation control do?

It operates a fresh-air intake damper and can activate the main HVAC blower when needed to support a selected ventilation schedule on compatible forced-air systems.

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