OWNER’S MANUAL

AIR FOR COMBUSTION

AND VENTILATION

Continued

DETERMINING FRESH-AIR FLOW FOR HEATER LOCATION

Determining if You Have a Confined or Unconfined Space

Use this work sheet to determine if you have a confined or unconfined space.

Space: Includes the room in which you will install heater plus any adjoining rooms with doorless passageways or ventilation grills between the rooms.

1.Determine the volume of the space (length x width x height).

Length x Width x Height = _________________ cu. ft. (volume of space)

Example: Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling height) = 2560 cu. ft. (volume of space)

If additional ventilation to adjoining room is supplied with grills or openings, add the volume of these rooms to the total volume of the space.

2.Multiply the space volume by 20 to determine the maximum Btu/Hr the space can support.

_______________ (volume of space) x 20 = (maximum Btu/Hr the space can support)

Example: 2560 cu. ft. (volume of space) x 20 = 51,200 (maximum Btu/Hr the space can support)

3.Add the Btu/Hr of all fuel burning appliances in the space.

Vent-free heater

_______________ Btu/Hr

Example:

 

 

 

Gas water heater*

_______________ Btu/Hr

 

 

 

Gas furnace

_______________ Btu/Hr

Gas water heater

 

40,000

Btu/Hr

Vented gas heater

_______________ Btu/Hr

Vent-free heater

+

31,500

Btu/Hr

Gas fireplace logs

_______________ Btu/Hr

Total

=

71,500

Btu/Hr

Other gas appliances*

+ _______________ Btu/Hr

 

 

 

 

Total

= _______________ Btu/Hr

 

 

 

 

*Do not include direct-vent gas appliances. Direct-vent draws combustion air from the outdoors and vents to the outdoors.

4.Compare the maximum Btu/Hr the space can support with the actual amount of Btu/Hr used.

_________________ Btu/Hr (maximum the space can support)

_________________ Btu/Hr (actual amount of Btu/Hr used)

Example: 51,200 Btu/Hr (maximum the space can support) 71,500 Btu/Hr (actual amount of Btu/Hr used)

The space in the above example 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 adjoin- ing room or add ventilation grills between rooms. See Ventilation Air From Inside Building, page 6.

B.Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 6.

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 unconfined space or if the building is of unusually tight construction, provide adequate combustion and ventilation air by one of the methods described in the National Fuel Gas Code, ANSI Z223.1/NFPA 54, Section 5.3 or applicable local codes.

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FMI FVF30P, FVF18P, FVF24P installation manual AIR for Combustion Ventilation, Determining FRESH-AIR Flow for Heater Location
Page 4 Page 6

FVF24P, FVF18P, FVF30P specifications

The FMI FVF series of fireplaces, which includes models FVF30P, FVF18P, and FVF24P, represents a blend of contemporary design and advanced heating technology. Each model is designed to provide efficient and aesthetic warmth to any space, making them ideal for modern homes and commercial settings.

The FVF30P is the largest in the series, featuring a striking glass front that allows for an unobstructed view of the flames. Its generous heating capability makes it suitable for larger rooms, ensuring that warmth permeates every corner. Equipped with a powerful blower system, this model enhances heat distribution, making it an ideal choice for those seeking both efficiency and aesthetics.

The FVF18P, in contrast, is designed for smaller spaces, combining compact dimensions with impressive heating performance. Its sleek design allows it to fit seamlessly into any decor, while still providing the ambiance of a traditional fireplace. With advanced technology that ensures optimal combustion, this model minimizes emissions and maximizes efficiency, meeting stringent environmental standards.

The FVF24P stands as a middle ground between the two, offering versatile installation options and a balanced heating output. This model also boasts an elegant glass front that enhances visual appeal. Like its counterparts, the FVF24P incorporates modern technologies that ensure a clean burn, significantly reducing fuel consumption while maximizing output.

All models include advanced ignition systems, such as electronic ignition, making startup simple and convenient. Each unit is designed with ease of maintenance in mind, featuring removable panels and accessible components that simplify cleaning. Moreover, these fireplaces offer various finishes and trim options, allowing customization to match individual tastes and home designs.

Safety is another hallmark of the FMI FVF series. Each fireplace is equipped with safety features such as a tempered glass front, automatic shut-off systems, and optional heat management systems to prevent overheating. Customer satisfaction is further ensured through generous warranties and exceptional after-sale support provided by FMI.

In conclusion, the FMI FVF30P, FVF18P, and FVF24P models stand out in the market due to their combination of aesthetic appeal, cutting-edge technology, and commitment to efficiency and safety, making them an excellent investment for anyone looking to enhance their living space with modern warmth.
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