Compact Heating System

Model Number

Btu/hr Input

Btu/hr Output

Efficiency Percentages

Type

Gas

Shipping Weight

 

 

 

 

of

Natural

Propane

Rating

Rating

Thermal

AFUE

Connection

(lbs.)

Control

 

 

 

 

 

 

 

 

2503532

2503531

25,000

19,250

77.0

76.0

24V Wall

⅜"

65

4003532

4003531

40,000

30,800

77.0

76.0

24V Wall

⅜"

98

Features

Unique, Self-Contained Direct-Vent System

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.

There's a Model for

Your Space Heating Needs

Furnace dimensions and easy installation allow for placement and operation through most windows and exterior walls. Consult this drawing and chart below for sizes.

Easy Installation

Through-the-Wall or Through-the-Window

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.

The 250 Series Models fit between standard 16" O.C. studs with no structural changes needed. Slide-out chassis design facilitates servicing.

Model

A

B

C

D

E

F

250 Series

16⅛"

15-3/32"

23⅝"

14-1/16"

13-1/16"

3-5/32"

400 Series

21¾"

15-3/32"

23⅝"

20-1/16"

14-3/16"

3-5/32"

How to Select the Right Model

Use the chart shown to determine the appropriate model to provide proper heating capacity for your square footage.

 

 

Amount of Insulation

Model

Well Insulated

Average

Poor

 

Insulation

Insulation

 

 

 

250 Series

1,225 sq. ft.

 

825 sq. ft.

625 sq. ft.

 

 

 

 

 

400 Series

2,050 sq. ft.

 

1,350 sq. ft.

1,000 sq. ft.

 

 

 

 

 

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 14 ⅜"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

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.

© 2008 Williams Furnace Co.

Printed in U.S.A.

All Rights Reserved

Subject to Change without Notice

L1136

5/08

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Williams 400 Series, 250 Series Unique, Self-Contained Direct-Vent System, Theres a Model for Your Space Heating Needs

250 Series, 400 Series specifications

The Williams 250 Series and 400 Series are cutting-edge ranges of air conditioning units, designed to provide optimal comfort and efficiency for both residential and commercial applications. Williams has built a reputation for quality and innovation, and these series reflect the company’s commitment to performance and reliability.

The Williams 250 Series features a compact design that makes it ideal for small spaces and tight installations. This series is particularly known for its energy-efficient operation, helping users save on utility costs while still enjoying a comfortable environment. With multiple BTU options available, the 250 Series can accommodate varying room sizes and specific cooling needs. The units are equipped with advanced dehumidification technology, ensuring reduced humidity levels and improved air quality.

One of the standout characteristics of the 250 Series is its quiet operation. Designed with noise reduction in mind, these units allow for a peaceful indoor atmosphere, making them perfect for bedrooms, living areas, or workplaces. Additionally, the series includes user-friendly controls and programmable thermostats, giving users the flexibility to set their desired temperature easily.

On the other hand, the Williams 400 Series takes innovation a step further. This series is engineered with a focus on enhanced durability and robust performance in various weather conditions. The 400 Series units feature a rugged design and more substantial insulation, allowing them to perform efficiently even in extreme temperatures. This series incorporates smart technology, enabling connectivity via mobile apps for remote monitoring and control.

Moreover, the 400 Series units often come with multi-speed fans and variable speed compressors, which enhance energy efficiency and provide superior climate control by adjusting to the cooling needs in real time. The use of environmentally friendly refrigerants is another key characteristic, aligning with modern sustainability goals.

Both the 250 Series and the 400 Series boast easy installation and maintenance, saving users time and money. With their diverse features and technologies, these units from Williams stand out as reliable solutions for achieving optimal comfort year-round. Whether you opt for the compact efficiency of the 250 Series or the robust performance of the 400 Series, you will experience the quality and technological advancements that Williams products are known for.