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Crown Boiler Company BWC090

90,000 BTU, Water Boiler, 91% Efficiency, Electronic Ignition, Natural Gas, Direct Vented


    • Shipping to Canada

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    • Pro Installation

The BWC is an aluminum gas fired condensing boiler designed for use in forced hot water heating systems requiring supply water temperatures of 180°F or less. This boiler may be vented vertically or horizontally with combustion air supplied from outdoors. This boiler is not designed for use in gravity hot water systems or systems containing significant amounts of dissolved oxygen.

Please read this Important Safety Notice

Standard Features

  • 3/4" boiler drain
  • Condensate trap
  • Combination temperature/pressure gauge
  • A.S.M.E. relief valve (30 PSI)
  • Taco # 014 circulator
  • Stainless steel burner
  • Direct spark ignition
  • Variable-speed blower assembly
  • Differential pressure switch for proving air flow
  • Probe style LWCO
  • Safety limit control
  • Micro processor control module
  • System sensors

Heating Capacity

The amount of heat, rated in BTUs that the item can produce.

Heating Capacity
90000 BTU
Effective Heating Capacity (BTUs)
Water Volume
.41 Gallons
Net Water Rating

The amount of heat, measured in BTUs, that the unit will be able to effectively deliver into your home.

Net Water Rating
70000 BTU
Efficiency (% AFUE)

The percentage of energy converted into output by the unit. The remaining percentage is lost during the conversion process. The higher the efficiency, the lower the operational cost.

Efficiency (% AFUE)
91 %
Efficiency Range

The percentage of energy converted into output by the unit. The remaining percentage is lost during the conversion process. The higher the efficiency, the lower the operational cost.

Efficiency Range
90 - 94%
Horizontal Venting
Concentric , Dual
Vertical Venting
Only Dual
Max Vent Length- Horizontal
55 Ft
Max Vent Length- Vertical
49.5 Ft
Max Air Inlet Length- Horizontal
55 Ft
Max Air Inlet Length- Vertical
49.5 Ft
Max Vent Length (Horizontal- Concentric / Dual)
32 / 55 ft
Max Inlet Length (Vertical)
49.5 ft
Max Inlet Length (Horizontal- Concentric / Dual)
32 / 55 ft
Min Vent Length (Concentric)
10 inches
Min Vent Length (Dual Pipe)
2 ft
ENERGY STAR® Qualified

Products earn the ENERGY STAR label by meeting the energy efficiency requirements set forth in ENERGY STAR specifications. The EPA establishes these specifications based on the following set of principles:

  • Product categories must contribute significant energy savings nationwide.
  • Qualified products must deliver the features and performance demanded by consumers, in addition to increased energy efficiency.
  • If the qualified product costs more than a conventional, less-efficient counterpart, purchasers will recover their investment in increased energy efficiency through utility bill savings, within a reasonable period of time.
  • Energy efficiency can be achieved through broadly available, non-proprietary technologies offered by multiple manufacturers.
  • Product energy consumption and performance can be measured and verified with testing.
  • Labeling would effectively differentiate products and be visible for purchasers.

ENERGY STAR® Qualified
Piping Connections - Water
1 1/4 Inch(es)
Air Inlet Diameter
3 inches
Dual Pipe Vent Diameter
3 inches
Concentric Pipe- Vent Diameter
60/100 mm
Product Weight
102 lbs
Meets CSA Standards

Canadian Standards Association

Meets CSA Standards
17 87/100 Inches
17 Inches
31 1/2 Inches
Cast Aluminum Sections Warranty
10 Years
Parts Warranty
1 Years