Air For Combustion

and Ventilation

WARNING: This heater shall not be installed in a confined space or unusually tight construc- tion unless provisions are provid- ed for adequate combustion and ventilation air. Read the following instructions to insure proper fresh air for this and other fuel-burning appliances in your home.

Today’s homes are built more energy efficient than ever. New materials, increased insulation and new construction methods help reduce heat loss in homes. Home owners weather strip and caulk around windows and doors to keep the cold air out and the warm air in. During heating months, home owners want their homes as airtight as possible.

While it is good to make your home energy effi- cient, your home needs to breathe. Fresh air must enter your home. All fuel-burning appliances need fresh air for proper combustion and ventilation.

Exhaust fans, fireplaces, clothes dryers and fuel burning appliances draw air from the house to operate. You must provide adequate fresh air for these appliances. This will insure proper venting of vented fuel-burning appliances.

PROVIDING ADEQUATE

VENTILATION

The following are excerpts from National Fuel Gas Code, ANSI Z223.1/NFPA 54, Section 5.3, Air for Combustion and Ventilation.

All spaces in homes fall into one of the three fol- lowing ventilation classifications:

1.Unusually Tight Construction

2.Unconfined Space

3.Confined Space

The information on pages 6 through 8 will help you classify your space and provide adequate ventilation.

Unusually Tight Construction

The air that leaks around doors and windows may provide enough fresh air for combustion and ventilation. However, in buildings of unusually tight construction, you must provide additional fresh air.

Unusually tight construction is defined as construction where:

a.walls and ceilings exposed to the out- side atmosphere have a continuous water vapor retarder with a rating of one perm (6 x 10-11kg per pa-sec-m2) or less with openings gasketed or sealed and

b.weather stripping has been added on openable windows and doors and

c.caulking or sealants are applied to areas such as joints around window and door frames, between sole plates and floors, between wall-ceiling joints, between wall panels, at penetrations for plumbing, electrical and gas lines and at other openings.

If your home meets all of the three criteria above, you must provide additional fresh air. See Ventilation Air From Outdoors, page 8.

If your home does not meet all of the three criteria above, proceed to Determin- ing Fresh-Air Flow For Heater Location, below.

Confined and Unconfined Space

The National Fuel Gas Code, ANSI Z223.1/NFPA 54 defines a confined space as a space whose volume is less than 50 cubic feet per 1,000 Btu per hour (4.8 m3 per kw) of the aggregate input rating of all appliances installed in that space and an unconfined space as a space whose volume is not less than 50 cubic feet per 1,000 Btu per hour (4.8 m3 per kw) of the aggregate input rating of all appliances installed in that space. Rooms com- municating directly with the space in which the appliances are installed*, through openings not furnished with doors, are considered a part of the unconfined space.

*Adjoining rooms are communicating only if there are doorless passageways or ventilation grills between them.

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.

www.desatech.com119162-01B

Page 5 Page 7
Page 6
Image 6
Desa VGC24NR/PR, VGC30NR/PR installation manual Air For Combustion Ventilation, Providing Adequate Ventilation
Page 5 Page 7

VGC24NR/PR, VGC30NR/PR specifications

Desa VGC24NR/PR and VGC30NR/PR are innovative gas fireplaces designed to offer efficient heating solutions while enhancing the aesthetics of any living space. Both models combine advanced technology with user-friendly features, ensuring a comfortable and visually appealing experience for homeowners.

A standout feature of the VGC series is its remarkable BTU output. The VGC24NR/PR delivers a maximum of 24,000 BTUs, while the VGC30NR/PR can generate up to 30,000 BTUs. This substantial heating capacity makes these fireplaces suitable for various room sizes, providing warmth even in larger spaces. The adjustable heat settings also allow users to customize the warmth according to their preferences, promoting energy efficiency.

Another significant characteristic of the VGC24NR/PR and VGC30NR/PR is their realistic flame presentation. Utilizing advanced burner technology, these units replicate the look of natural wood burning fires. The flames dance against the backdrop of elegant logs or stones, creating a cozy atmosphere that enhances any interior décor. The visual experience is elevated by the optional ember bed lighting, which can provide an ambient glow, making the fireplace a focal point in the room.

Safety is a paramount consideration in the design of these fireplaces. Both models are equipped with built-in safety features, including an automatic shut-off system that activates in the event of a malfunction. Additionally, they meet stringent safety and emissions standards, ensuring that they are environmentally friendly choices.

Installation is straightforward with the VGC series, thanks to their ventless design that allows for flexibility in placement. These units can be installed in a variety of locations without the need for an external venting system, making them an ideal solution for both new constructions and remodels. The minimalist design also aids in space-saving, making it easy to integrate into compact living areas.

Furthermore, the Desa VGC24NR/PR and VGC30NR/PR come with user-friendly controls, including options for remote operation and wall switches, which add convenience to daily use. With their combination of efficiency, aesthetic appeal, and safety features, these gas fireplaces represent an excellent choice for anyone looking to enhance their home’s comfort and charm.
Top Page Image Contents