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Innovative Hearth Products
DRT4000 Series Direct-Vent Gas Fireplaces
BTU Input
Table 1 - Input Rate (BTU/HR), Gas Valves
† 12,000 in Ecoflow Models
Table 2 - Thermal Efficiency (%)
* P4 (EnerGuide) is a measurement of the Canadian Office of Energy Efficiency. Efficiencies are based on Normal input operation.
Gas Pressure
Table 3 - Inlet Gas Supply Pressure
Table 4 - Manifold Gas Supply Pressure
Test gauge connections are provided on the front of the millivolt and electronic gas control valve (identified IN for the
inlet and OUT for the manifold side). The control valves have a 3/8" (10 mm) NPT thread inlet and outlet side of the
valve (Figures 1 and 2).
Figure 1 - Millivolt Gas Valve
Inlet Pressure Port
SIT Millivolt Gas Valve
Main Gas
Control Knob
Propane tanks are at pressures that will cause damage to valve components. Verify that the tanks have step down
regulators to reduce the pressure to safe levels.
The appliance and its appliance main gas valve must be disconnected from the gas supply piping system during
any pressure testing of that system at test pressures in excess of 1/2 psi (3.5 kPa).
The appliance must be isolated from the gas supply piping system by closing its equipment shutoff valve during
any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psi (3.5 kPa).
Models
40" Models
45" Models
Model
40" Models
45" Models
Fuel
Natural Gas
Propane
Fuel
Natural Gas
Propane
Natural Gas
High Rate
Low Rate
28,000
20,000
31,000
21,000
Millivolt
P4 *
49
50
Minimum
5" WC (1.25 kPa)
11.0" WC (2.74 kPa)
Pressure
3.5" WC (0.87 kPa)
10.0" WC (2.49 kPa)
Figure 2 - Electronic Gas Valve
Ecoflow Electronic Gas Valve
General Information
900697-01 01/2017
Propane Gas
High Rate
Low Rate
25,000
18,000
31,000
20,000
Electronic
P4 *
52
56
Maximum
10.5" WC (2.61 kPa)
13.0" WC (3.23 kPa)
9
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