Unconfined Space

A water heater in an unconfined space uses indoor air for combustion and requires at least 50 cubic feet for each 1,000 BTUH of the total input for all gas appliances. The table below shows a few examples of the minimum square footage (area) required for various BTUH inputs.

Table 2

 

 

BTUH

Minimum Square

Typical Room

Feet with

Input

with 8' Ceiling

8' Ceiling

 

 

30,000

188

9 x 21

45,000

281

14 x 20

60,000

375

15 x 25

75,000

469

15 x 31

90,000

563

20 x 28

105,000

657

20 x 33

120,000

750

25 x 30

135,000

844

28 x 30

 

 

 

IMPORTANT:

•The area must be open and be able to provide the proper air requirements to the water heater. Areas that are being used for storage or contain large objects may not be suitable for water heater installation.

•Water heaters installed in open spaces in buildings with unusually tight construction may still require outdoor air to function properly. In this situation, outside air openings should be sized the same as for a confined space.

•Modern home construction usually requires supplying outside air into the water heater area.

Confined Space

For the correct and proper operation of this water heater, ample air must be supplied for the combustion, ventilation, and dilution of flue gases. Small enclosures and confined areas must have two permanent openings so that sufficient fresh air can be drawn from outside of the enclosure. One opening shall be within 12 inches of the top and one within 12 inches of the bottom of the enclosure as shown in Figure 4.

The size of each opening (free area) is determined by the total BTUH input of all gas utilization equipment (i.e., water heaters, furnaces, clothes dryers, etc.) and the method by which the air is provided. The BTUH input can be found on the water heater data plate. Additional air can be provided by two methods:

1.All air from inside the building.

2.All air from outdoors.

Figure 4

12” maximum

 

 

Opening Locations-

 

 

 

 

 

 

Confined Spaces

 

 

 

 

 

 

 

 

 

Closet

 

 

 

 

 

 

 

 

 

 

Permanent

 

 

 

or

 

 

 

other

openings to

 

 

 

confined

the outside or

 

space

additional

 

 

 

 

rooms within the building

12” maximum

All Air from Inside the Building

When additional air is to be provided to the confined area from additional room(s) within the building, the total volume of the room(s) must be of sufficient size to properly provide the necessary amount of fresh air to the water heater and other gas utilization equipment in the area. If you are unsure that the structure meets this requirement, contact your local gas utility company or other qualified agency for a safety inspection.

Each of the two openings shall have a minimum free area of 1 square inch per 1,000 BTUH of the total input rating of all gas utilization equipment in the confined area, but not less than 100 square inches (Figure 5).

Confined

Space

Permanent

Openings

1 square

inch/1000

BTUH

(minimum

100 sq. In.)

Figure 5

All Air from Inside Building

Confined Space Installation

8

Page 7 Page 9
Page 8
Image 8
Whirlpool BFG1J4040T3NOV 7K, BFG1F5050T4NOV, 4220, 216071 Unconfined Space, Confined Space, All Air from Inside the Building
Page 7 Page 9

192906, BFG1F4034T3PV, BFG1F4034T3PV 7K, 195102, 211456 specifications

The Whirlpool BFG2H4040T3NOV E and BFG1J4040T3NOV 5K are high-efficiency gas water heaters that cater to the needs of modern households with their cutting-edge technologies and features. Engineered with the latest advancements, these models ensure optimal performance, energy efficiency, and user convenience.

One of the standout features of the Whirlpool BFG series is its robust build quality. Both models are designed with a cylindrical stainless-steel tank that enhances durability and longevity. The insulation used in these heaters minimizes heat loss, ensuring that water remains hot for an extended period while reducing energy consumption. This characteristic not only saves on utility bills but also contributes to environmentally friendly practices.

Additionally, the BFG2H4040T3NOV E and BFG1J4040T3NOV 5K incorporate smart technology that simplifies the user experience. The thermostatic control allows homeowners to set and maintain precise water temperatures according to their preferences, providing comfort and convenience. Furthermore, these models are equipped with a high-efficiency burner system that maximizes the heating process, ensuring that hot water is readily available when needed.

Safety is a significant focus of Whirlpool's design philosophy. The BFG series features advanced safety mechanisms including a flame arrestor that prevents combustion incidents, along with a built-in pressure relief valve. These safety features offer peace of mind for users, ensuring worry-free operation in everyday use.

Moreover, the Whirlpool BFG model line is designed with installation flexibility in mind. They can be seamlessly integrated into various home designs, whether residential or commercial. The compact nature of these heaters allows for space-saving installations while delivering high output efficiency.

The BFG series also emphasizes user serviceability with clear instructions for maintenance and troubleshooting, enabling homeowners to address common issues effectively without requiring professional assistance. This aspect further enhances the overall ownership experience, making these water heaters an excellent choice for energy-conscious consumers.

In summary, the Whirlpool BFG2H4040T3NOV E and BFG1J4040T3NOV 5K stand out in the market due to their exceptional durability, advanced technology, safety features, and ease of installation. With their energy-efficient design and user-friendly functionality, these gas water heaters provide the perfect solution for families seeking reliable hot water solutions.
Top Page Image Contents