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Crown Boiler Company CWD-138
137,500 BTU, Water Boiler, 85.2% Efficiency, Electronic Ignition, Natural Gas/LP, Direct Vented

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The CWD series boiler is a cast iron gas fired boiler designed for use in forced hot water heating systems. It is is a low pressure boiler intended for use in closed heating systems with water temperatures under 240F. This boiler may be vented either vertically or horizontally with combustion air supplied from either outdoors or (under certain conditions) indoors. It is ideal for use in installations where a reliable source of clean indoor combustion air cannot be guaranteed.

Please read this Important Safety Notice

Standard Features
  • Approved for installation on non-carpeted combustible floors
  • Ideal for tightly built and well insulated new homes and houses without chimneys
  • Cast iron wet-leg heat exchanger
  • Direct horizontal venting or vertical venting options to suit most locations - category III venting; see intallation instructions
  • Powered intake and venting
  • System Controller provides two zones
  • Plug-in outdoor temperature rest control
  • Self diagnostics with LED indicators
  • Pressure switch
  • Electronic ignition and step opening gas valve
  • Stainless steel burners
  • Altitudes above 2,000ft ratings should be reduced at a rate of 4% for each 1,000ft above sea level
Heating Capacity
137500 BTU 

Effective Heating Capacity (BTUs)

Water Capacity
3.6 Gallons 

Net Water Rating
102000 BTU 

Efficiency (% AFUE)
85.2 % 

Efficiency Range
80 - 89%  

Max Vent Length- Horizontal
55 Ft 

Max Vent Length- Vertical
47 Ft 

Max Air Inlet Length- Horizontal
60 Ft 

Max Air Inlet Length- Vertical
52 Ft 

Piping Connections - Water
1 1/4 Inch(es) 

Air Inlet Diameter
4 inches 

Dual Pipe Vent Diameter
3 inches 

Product Weight
385 lbs 

Meets CSA Standards

27 Inches 

22 13/100 Inches 

36 63/100 Inches 

Cast Iron Sections Warranty

Parts Warranty
1 Years 
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(800) 865-5931
Monday to Friday
8:30am - 5:00pm Central
  Mailing Address
1901 N. Clybourn Avenue
Suite 200
Chicago, IL 60614
[email protected]
or Contact Us Here
(425) 928-2455
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