Product Specifications; Water Vapor: A By-Product Of Unvented Room Heaters - Empire Comfort Systems FDR30LBP-2 Installation Instructions And Owner's Manual

Model
VFDR(18,24,30)LB
VFDR18LB10
VFDT(18,24,30)LB
VFDM(18,24,30)LB
Model
VFDR18LB10N
VFDR18LB10P
VFDR18LBN
VFDR18LBP
VFDR24LBN
VFDR24LBP
VFDR30LBN
VFDR30LBP
VFDT18LBN
VFDT18LBP
VFDT24LBN
VFDT24LBP
VFDT30LBN
VFDT30LBP
VFDM18LBN
VFDM18LBP
VFDM24LBN
VFDM24LBP
VFDM30LBN
VFDM30LBP
NOTICE:

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
every 1,000 BTU's (.3KW's) of gas input per hour.
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.
Page 6

PRODUCT SPECIFICATIONS

Gas Valve Type
Natural
Millivolt
Propane
Natural
Millivolt
Propane
Natural
Thermostat
Propane
Natural
Manual
Propane
BTU/hr.
Max. Rate
10,000
10,000
28,000
28,000
34,000
34,000
40,000
40,000
28,000
28,000
34,000
34,000
40,000
40,000
28,000
28,000
34,000
34,000
40,000
40,000
Thermostats are for Vent-Free Applications only.
Regulator Pressure Gas Inlet 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.
BTU/hr. BTU/hr.
Med. Rate Min. Rate
N/A N/A
N/A N/A
N/A 19,000
N/A 22,000
N/A 24,000
N/A 26,000
N/A 27,000
N/A 31,000
N/A 19,000
N/A 22,000
N/A 24,000
N/A 26,000
N/A 27,000
N/A 31,000
23,000 19,000
25,000 22,000
29,000 24,000
30,000 26,000
32,000 27,000
36,000 31,000
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.
2. If high humidity is experienced, a dehumidifier may be used to
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
Max Minimum
10.5" W.C. 4.5" W.C.
13.0" W.C. 11.0" W.C.
10.5" W.C. 5.0" W.C.
13.0" W.C. 11.0" W.C.
10.5" W.C. 7.0" W.C.
13.0" W.C. 11.0" W.C.
10.5" W.C. 7.0" W.C.
13.0" W.C. 11.0" W.C.
Air Shutter Open-
ing
1/16"
3/16"
1/8"
5/16"
1/8"
5/16"
1/8"
3/8"
1/8"
5/16"
1/8"
5/16"
1/8"
3/8"
1/8"
5/16"
1/8"
5/16"
1/8"
3/8"
27604-3-0411