Specification

Technical Service: 800.742.8368 • fieldcontrols.com 19
Venting
Oil Appliance
RC Draft
Control
Stop
the
waste
Without
Field OVD
Oil Appliance
OVD
Oil Vent
Damper
RC Draft
Control
Blocked Vent
Safety Switch
With
Field OVD
Field’s Oil Vent Damper increases AFUE by up to 2% which
translates to a savings of approximately 5% to 10% per year on
heating costs. See the chart for a quick reference of potential
savings over five years on a typical mid-efficiency system.
1. When the thermostat calls for heat, the vent damper begins to open.
2. Within five seconds, the damper opens completely.
3. Two safety switches prove the damper is completely open before allowing the burner to fire.
4. When the oil appliance thermostat is satisfied, the vent damper remains open for approximately three minutes
before closing. This allows the remaining products of combustion to safely vent up the chimney.
5. The vent damper remains closed until the next call for heat, preventing drafts, improving comfort, and reducing
heat loss.
Assumes an average fuel cost of $3.50 per gallon.
Annual
Fuel Usage
(gallons)
900 1200 1500 1800
Potential
Savings
(over 5 years)
5%
(5 ft. chimney)
$787 $1050 $1312 $1575
10%
(taller chimney)
$1575 $2100 $2625 $3150
How It Works
Put a Damper on Oil Heating Bills
Oil Vent Damper