Specification

11/17 FORM NO. THD-RHE Rev. 2
In keeping with its policy of continuous progress and product improvement, Rheem reserves the right to make changes without notice.
Rheem Water Heating • 1115 Northmeadow Parkway, Suite 100
Roswell, Georgia 30076 • www.rheem.com
Air-Inlet and Venting Information
From Sea Level Through 5,999 ft. Above Sea Level
Vent & Combustion Minimum Allowed Maximum Allowed Vent
Air-Inlet Equivalent Vent & Combustion Equivalent Vent & Combustion and Combustion
Pipe Diameter Air-Inlet Lengths – Air-Inlet Lengths – Air-Inlet System
Model (Inches) Each Pipe Run (Ft.) Each Pipe Run (Ft.) Termination(s)
ECORHE40S 2 7 30 90° Elbows Concentric*
ECORHE40S 3 7 60 90° Elbows Concentric*
ECORHE50 2 7 30 90° Elbows Concentric*
ECORHE50 3 7 60 90° Elbows Concentric*
From 6,000 ft. Above Sea Level Through 8,999 ft. Above Sea Level
Vent & Combustion Minimum Allowed Maximum Allowed Vent
Air-Inlet Equivalent Vent & Combustion Equivalent Vent & Combustion and Combustion
Pipe Diameter Air-Inlet Lengths – Air-Inlet Lengths – Air-Inlet System
Model (Inches) Each Pipe Run (Ft.) Each Pipe Run (Ft.) Termination(s)
ECORHE40S 2 Not Allowed Not Allowed – –
ECORHE40S 3 7 45 90° Elbows Concentric*
ECORHE50 2 Not Allowed Not Allowed – –
ECORHE50 3 7 45 90° Elbows Concentric*
One 90° elbow is equivalent to 5 feet of straight pipe. One 45° elbow is equivalent to 2.5 feet of straight pipe.
The vent and combustion air inlet terminations are not included in the equivalency calculations.
* Use only Rheem 3 inch concentric termination kit SP20245.
Uniform Energy Factor and rated gallon capacity based on Department of Energy (DOE) requirements.
LEED Points = 2
T&P FITTING
3/4" NPT
BA C G
D
E
1/2"
F
I
COMBUSTION
AIR INLET
COMBUSTION
EXHAUST (VENT)
H
HOT WATER
CONNECTION
H
COLD WATER
CONNECTION
Rheem EcoSense
®
High Efficiency Condensing Power Direct Vent Specifications
Fuel Type Description
Nominal
Gallon
Capacity
Rated
Gallon
Capacity
Model
Number
Gas Input
in Thous.
Btu/h
Recovery
in G.P.H.
90° F Rise
First Hour
Delivery
G.P.H.
Ht. to
Vent
A
Ht. to
Air Inlet
B
Tank
Height
C
Diam.
D
Ht. to
Gas
Conn.
E
Water
Conn.
Center
F
Ht. to
Side T&P
Valve
G
Water
Conn.
Size
H
Front
to
Back
I
Ship
Weight
(LBS)
Uniform
Energy
Factor
(UEF)
Natural Gas Short 38 37 ECORHE40S 40 48.5 87 60-3/8 60-1/8 51-1/16 22-1/8 14-1/8 8 44-1/4 3/4 26-11/16 220 0.83
Natural Gas Tall 48 46 ECORHE50 40 48.5 87 68-3/4 68-5/8 59-11/16 22-1/8 14-1/8 8 52-7/8 3/4 26-11/16 250 0.80
Liquid Propane Short 38 37 ECORHE40SP 36 43.6 87 60-3/8 60-1/8 51-1/16 22-1/8 14-1/8 8 44-1/4 3/4 26-11/16 220 0.83
Liquid Propane Tall 48 46 ECORHE50P 36 43.6 87 68-3/4 68-5/8 59-11/16 22-1/8 14-1/8 8 52-7/8 3/4 26-11/16 250 0.80