Product Specifications; Water Vapor: A By-Product Of Unvented Room Heaters; Vfdr18Lbw10N; Vfdr18Lbwn - Empire Comfort Systems VFDR18LBW10N-4 Installation Instructions And Owner's Manual

Model
VFDR(18,24,30)LBW
VFDR18LBW10
VFDT(18,24,30)LBW
VFDM(18,24,30)LBW
NOTICE: Thermostats are for Vent-Free Applications only.

WATER VAPOR: A BY-PRODUCT OF UNVENTED ROOM HEATERS

Water vapor is a by-product of gas combustion. An unvented room
heater produces approximately one (1) ounce (30ml) of water for
Unvented room heaters must be used as supplemental heat (a
room) rather than a primary heat source (an entire house). In most
supplemental heat applications, the water vapor does not create a
problem. In most applications, the water vapor enhances the low
humidity atmosphere experienced during cold weather.
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PRODUCT SPECIFICATIONS

Gas
Natural
Millivolt
Propane
Natural
Millivolt
Propane
Natural
Thermostat
Propane
Natural
Manual
Propane
Model

VFDR18LBW10N

VFDR18LBW10P

VFDR18LBWN

VFDR18LBWP

VFDR24LBWN

VFDR24LBWP

VFDR30LBWN

VFDR30LBWP

VFDT18LBWN

VFDT18LBWP
VFDT24LBWN
VFDT24LBWP
VFDT30LBWN
VFDT30LBWP
VFDM18LBWN
VFDM18LBWP
VFDM24LBWN
VFDM24LBWP
VFDM30LBWN
VFDM30LBWP
Regulator Pressure
Setting
3.5" W.C.
10.0" W.C.
3.5" W.C.
10.0" W.C.
6.0" W.C.
10.0" W.C.
6.0" W.C.
10.0" W.C.
10,000 N/A
10,000 N/A
28,000 N/A
28,000 N/A
34,000 N/A
34,000 N/A
40,000 N/A
40,000 N/A
28,000 N/A
28,000 N/A
34,000 N/A
34,000 N/A
40,000 N/A
40,000 N/A
28,000 23,000
28,000 25,000
34,000 29,000
34,000 30,000
40,000 32,000
40,000 36,000
The following steps will help insure that water vapor does not
become a problem.
1. Be sure the heater is sized properly for the application, including
ample combustion air and circulation air.
help lower the water vapor content of the air.
3. Do not use an unvented room heater as the primary heat source
(an entire house).
Gas Inlet Pressure Gas Inlet Pressure
10.5" W.C.
13.0" W.C.
10.5" W.C.
13.0" W.C.
10.5" W.C.
13.0" W.C.
10.5" W.C.
13.0" W.C.
N/A
N/A
19,000
22,000
24,000
26,000
27,000
31,000
19,000
22,000
24,000
26,000
27,000
31,000
19,000
22,000
24,000
26,000
27,000
31,000
Minimum
4.5" W.C.
11.0" W.C.
5.0" W.C.
11.0" W.C.
7.0" W.C.
11.0" W.C.
7.0" W.C.
11.0" W.C.
30726-0-0612