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Silver cylindrical HVAC draft control with adjustment markings

Field Controls

Field Controls 46220901 4RC 4" Barometric Draft Control HVAC control

SKU CH-P46A-5YKQP

A barometric draft control calibrated for oil, wood or coal heating equipment with an adjustment range of .02 to .08 inches

  • Product colorSilver
  • Precise draft regulation from 0.02" to 0.08" settings
  • Calibrated for easy adjustment to manufacturer specifications
  • Standard equipment on leading oil and coal heating brands
  • Designed for residential and commercial heating applications
  • Sensitive control requires instrumentation during installation adjustment

Product Identity

The Field Controls 46220901 4RC is a barometric draft control designed for residential and commercial heating systems that burn oil, wood, or coal. It regulates chimney draft to maintain consistent combustion efficiency. The unit is supplied as standard equipment on many leading brands of heating appliances and features a silver finish.

Installation Requirements

Verify that the heating appliance manufacturer specifies a draft setting range between .02" and .08" water column. The control is calibrated for easy adjustment to these specifications. Instrumentation such as a draft gauge is required to set the unit accurately during installation. Confirm the vent connection matches the control's 4 inch size before ordering.

Ideal Applications

This control suits installers and technicians fitting or servicing oil, wood, or coal-fired furnaces and boilers where precise draft regulation is specified. It is not intended for gas-fired appliances or systems requiring draft settings outside the .02" to .08" range. Buyers without access to draft measurement instruments should not attempt installation.

How it compares

Measured against everything we stock in Heating & Cooling Controllers, at today’s prices. Recalculated every night.

Price $45.99
Typical for this category: the median of 1,762 items is $45.99.

Specifications

Product
Brand nameField controls
Product colorSilver

Questions about this item

What comes in the box and what must be purchased separately?

The control unit itself is supplied. No mounting hardware, piping or instrumentation is included.

Which version or capacity should I select for my installation?

This is the 4RC model calibrated for 0.02 to 0.08 inch water column settings. No alternative capacities are offered.

What does the 0.02 to 0.08 range mean once the control is installed on a furnace?

It sets the draft pressure the regulator will maintain. Adjustment within that range requires a manometer or similar gauge.

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