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FEATURES 

EX22 (RHFE-558RWTA) 

Type of Appliance 
 
 

Rinnai Model Number 

Gas Rate Input (BTU/hour) 
 

Gas Rate Output (BTU/hour) 
 

AFUE Rating 

Minimum Gas Supply Pressure 

Maximum Gas Supply Pressure 

Electrical Connection 

Gas Connection 

Combustion System 

Ignition System 

Fan CFM Output: 

Temperature Settings 

 
 
Temperature Control 

 

 

Humidifier Tray 

Weight 

Clearance from Combustibles 

 
Noise Level 

Warm Air Outlet 

Direct vent wall furnace suitable for homes, apartments, and )
condominiums; modular/mobile home approved; forced combustion, 
forced convection 

RHFE-558RWTA-N (Natural gas) RHFE-558RWTA-P 

(Propane) 

Low - 8,200 

Low - 8,200   

 

 

High - 21,500 

High - 20,700 

Low - 6,560 

Low - 6,560 

High - 17,200 

High - 16,560 

80.6% 81.0% 

3.5 in (89 mm) W.C. 

8 in (203 mm) W.C. 

10.5 in (267 mm) W.C  

13 in (330 mm) W.C. 

AC 120V, 60 Hz, 47 watts 

1/2 inch FNPT 

Stainless steel inshot burners 

Direct spark 

Low: 110.5 

High: 162.7 

Low (LO): minimum combustion 
60° - 80° F in 2° increments  

 

High (HI): maximum combustion 

• 

Electronic 7 day, 28 event programmable set back thermostat 

• 

Frost protection function allows a pre-set minimum room temperature 

• 

Temperature limiting program to comply with Inside Design 
Temperature limits 

Enameled tray with capacity of 3 pints (1.3 liters) 

Approximately 51 lbs (23 kg) 

Side: 2 inches (50 mm) 

Top: 10 inches (250 mm) 

Front: 40 inches (1 m) 

32 - 41 dB(A) 

Bottom front louvers 

© 2009 Rinnai Corporation 

RHFE-558RWTA SP                      7/2009 

provides precise gas flow  

detects temperature change in 1/2 of a degree 

monitors and controls combustion fan  

reduces noise through use of swept blades in convection fan; and 
through the design of the combustion chamber and heat exchanger 
which silently expand or contract due to temperature changes  

continually monitors functions; provides auto shutdown codes; indicates 
when air filter needs cleaning 

Linear function modulation: 

Negative coefficient thermistor:   

Variable speed inducer motor: 

Quiet operation: 

 

 

Self diagnostic electronics:  

 

Reviews: