6

AIR FOR COMBUSTION AND VENTILATION

Determining Fresh-Air Flow for Heater Location (Cont.) Ventilation Air

AIR FOR COMBUSTION AND VENTILATION

Continued

The space in the example on page 5 is a confined space because the actual Btu/Hr used is more than the maximum Btu/Hr the space can support. You must provide additional fresh air. Your options are as follows:

A. Rework worksheet, adding the space of an adjoining room. If the

extra space provides an unconfined space, remove door to adjoining

Ventilation

Grills

Into Adjoining

12"

Ventilation Grills

Into Adjoining Room,

room or add ventilation grills between rooms. See Ventilation Air From

Room,

Or

Option 2

Inside Building.

Option 1

Remove

B. Vent room directly to the outdoors. See Ventilation Air From Out-

doors.

C. Install a lower Btu/Hr heater, if lower Btu/Hr size makes room unconfined.

If the actual Btu/Hr used is less than the maximum Btu/Hr the space can support, the space is an unconfined space. You will need no additional fresh air ventilation.

WARNING: If the area in which the heater may be operated is smaller than that defined as an uncon- fined space or if the building is of unusually tight construction, provide adequate combustion and ven- tilation air by one of the methods described in the National Fuel Gas Code, ANSI Z223.1/NFPA 54 Sec- tion 5.3 or applicable local codes.

VENTILATION AIR

Ventilation Air From Inside Building

This fresh air would come from an adjoining unconfined space. When ventilating to an adjoining unconfined space, you must provide two permanent openings: one within 12" of the ceiling and one within 12" of the floor on the wall connecting the two spaces (see options 1 and 2, Figure 3). You can also remove door into adjoining room (see option 3, Figure 3). Follow the National Fuel Gas Code, ANSI Z223.1/NFPA 54, Section 5.3, Air for Combustion and Ventilation for required size of ventilation grills or ducts.

Ventilation Air From Outdoors

Provide extra fresh air by using ventilation grills or ducts. You must provide two permanent openings: one within 12" of the ceiling and one within 12" of the floor. Connect these items directly to the outdoors or spaces open to the outdoors. These spaces include attics and crawl spaces. Follow the National Fuel Gas Code, ANSI Z223.1/NFPA 54, Section 5.3, Air for Combustion and Ventilation for required size of ventilation grills or ducts.

IMPORTANT: Do not provide openings for inlet or outlet air into attic if attic has a thermostat-controlled power vent. Heated air entering the attic will activate the power vent.

Door into Adjoining Room, Option 3

12"

Figure 3 - Ventilation Air from Inside Building

 

 

Outlet

 

Ventilated

 

 

 

Attic

 

 

Air

 

 

 

 

 

 

 

 

 

 

Outlet

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Air

 

 

 

 

 

 

 

 

 

 

 

 

 

 

To Attic

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Air

 

;;;;QQQQ¢¢¢¢

To

 

 

 

Crawl

Inlet

 

 

Space

 

 

 

 

Inlet Air

Ventilated

 

 

Crawl Space

 

 

 

 

Figure 4 - Ventilation Air from Outdoors

 

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Desa EFS33PR installation manual Ventilation AIR, Ventilation Air From Inside Building, Ventilation Air From Outdoors
Page 5 Page 7

EFS33PR specifications

Desa EFS33PR is an innovative electric fireplace solution designed to bring warmth and ambiance to modern living spaces. With its sleek design and advanced features, this unit stands out as a versatile and efficient heating appliance. One of the main highlights of the EFS33PR is its realistic flame effect, which utilizes cutting-edge LED technology to simulate the appearance of a glowing fire. This feature allows users to enjoy the visual appeal of a traditional fireplace without the mess, smoke, or maintenance associated with wood-burning units.

Another significant characteristic of the EFS33PR is its adjustable heat settings. The fireplace offers multiple heat output levels, allowing users to customize the warmth according to their preferences and the specific requirements of their space. This flexibility ensures efficient energy consumption, making the fireplace not only a stylish addition to home decor but also a practical heating solution.

The EFS33PR is designed with user convenience in mind. It comes equipped with a remote control, enabling users to operate the fireplace from the comfort of their sofa or bed. This added convenience is particularly appreciated during colder months when getting up to adjust settings may not be ideal. Additionally, the fireplace is equipped with a timer function, allowing users to set it to turn on or off after a specified duration.

Safety is another priority in the design of the Desa EFS33PR. The unit is built with overheat protection, ensuring that it operates within safe temperature limits. This feature provides peace of mind, especially in homes with pets or children, as it minimizes the risk of accidental burns or overheating.

The EFS33PR is also designed for easy installation. It can be mounted on the wall or placed in a corner, making it a versatile option for different room layouts. Its contemporary aesthetic is complemented by a range of color options, ensuring it can blend seamlessly into various interior styles.

In conclusion, the Desa EFS33PR electric fireplace combines modern technology, convenience, and safety features, making it an ideal choice for those seeking an efficient and stylish heating solution. Whether enhancing the decor of a living room or adding warmth to a bedroom, the EFS33PR offers a perfect blend of functionality and elegance.
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