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Natural Propane Thermal AFUE
2503532 2503531 19,250 77.0 76.0
4003532 4003531 30,800 77.0 76.0
There's a Model for
Your Space Heating Needs
Unique, Self-Contained Direct-Vent System
Model A B C D E F
Easy Installation
250 Series 16⅛" 15-3/32" 23⅝" 14-1/16" 13-1/16" 3-5/32"
Through-the-Wall or Through-the-Window
400 Series 21¾" 15-3/32" 23⅝" 20-1/16" 14-3/16" 3-5/32"
How to Select the Right Model
Model
250 Series
400 Series
Features
The Compact Heating System offers
exceptional installation flexibility found in
no other direct-vent product. With unique
slide-in/slide-out chassis, it moves easily into
a window or wall opening with only
electrical and gas hookups required. Fuel
connection can be made on either the front
(interior) or rear (exterior) of the unit, giving
you a choice of installation.
Williams compact design incorporates an
attractive front grille that extends only 3¼
inches into the room, saving valuable
interior space.
© 2008 Williams Furnace Co. Printed in U.S.A. All Rights Reserved Subject to Change without Notice L1136 5/08
The 250 Series Models fit between standard
16" O.C. studs with no structural changes
needed. Slide-out chassis design facilitates
servicing.
With either wall or window installation, the Compact Heating System
requires no chimney or flue pipe. The sealed combustion system uses
only outside air, and the exhaust gases are discharged directly to the
outside.
1,000 sq. ft.
Well Insulated
Average
Insulation
Poor
Insulation
24V Wall ⅜"
⅜"
65
9824V Wall
Btu/hr Input
Rating
25,000
40,000
Compact Heating System
Model Number
Btu/hr Output
Rating
Shipping Weight
(lbs.)
Type
of
Control
Efficiency Percentages
Gas
Connection
2,050 sq. ft.
1,225 sq. ft. 825 sq. ft.
1,350 sq. ft.
Amount of Insulation
Use the chart shown to determine the appropriate model to provide proper
heating capacity for your square footage.
Furnace dimensions and easy installation allow for placement and operation
through most windows and exterior walls. Consult this drawing and chart below
for sizes.
625 sq. ft.
Important
· Read owner's manual before using/installing.
· Photographs are representative.
· Check local codes and ordinances for permitted uses.
· Consult installation manual for clearances prior to installation.
· We reserve the right to amend product specifications without notice.
· Installation and servicing recommended by a qualified service person.
· New York approval MEA117-77-E11.
· Minneapolis certificate of approval number 5787.
· Please read the warranty for any limitations for disclaimers.
· Combustion chamber carries a five-year limited warranty. All other
parts carry a one-year limited warranty.
Dimensions and Clearances
Cabinet Clearances
All models, top, bottom and sides 0", rear 36".
Grille Clearances
All models, top to ceiling 12", adjacent side wall 12", front 8', floor 6" (2" if noncombustible).
Wall Opening Size
25,000 Btu/hr models: 14¼"W x 13⅝"H
40,000 Btu/hr models: 20-5/16"W x 14⅜"H
250 West Laurel Street · Colton, California 92324 USA
(909) 825-0993 · Fax: (909) 370-0581 or (909) 824-8009
Consumer Line: (888) 256-6465
Homeowner Assistance: (909) 426-0978
www.e-wfc.com