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Innovative Hearth Products
DRT2000-C Series Direct-Vent Gas Fireplaces
BTU Input
Table 1 - Input Rate (BTU/HR), Gas Valves
Table 2 - Thermal Efficiency (%)
*
AFUE is a measurement of the US Department of Energy,
** Complies with CSA P.4.1-2015 "Testing Method for Measuring Annual Fireplace
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 Line Gas Pressures
Fuel
Natural Gas
Propane
Test gauge connections are provided on the front of the millivolt 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 (Figure 1).
Figure 1A - Millivolt Gas Valve
Inlet Pressure Port
SIT - Millivolt
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
35" Models
40" Models
45" Models
Model
35" Models
40" Models
45" Models
Minimum
5" WC / (1.25 kPa)
11.0" WC / (2.74 kPa)
Natural Gas
High Rate
Low Rate
17,000
13,000
20,000
16,000
22,000
18,000
Millivolt & Electronic
AFUE *
Natural
Propane
68.2
67.9
70.3
71.5
71.9
71.8
Table 4 - Manifold Outlet Gas Supply Pressure
Maximum
10.5" WC / (2.61 kPa)
13.0" WC / (3.23 kPa)
Figure 1B - Electronic Gas Valve
Inlet 3/8" NPT
Outlet Pressure
Tap
Inlet Pressure
Tap
General Information
900948-00C, 06/2019
Propane Gas
High Rate
Low Rate
17,000
13,000
18,500
14,000
21,000
16,000
P4 **
Natural
Propane
64.6
67.8
62.4
62.4
62.7
63.6
Based on CSA P.4.1-2015
Fuel
Pressure
Natural Gas
3.5" WC / (0.87 kPa)
Propane
10.0" WC / (2.49 kPa)
Outlet 3/8"
NPT
Pilot Outlet
7/16" UNS
9
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