AIR for Combustion and Ventilation

AIR FOR COMBUSTION AND VENTILATION

Providing Adequate Ventilation

WARNING: This heater shall not be installed in a confined space or unusually tight construction un- less provisions are provided for adequate combus- tion and ventilation air. Read the following instruc- tions 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 efficient, 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 following ventilation classifications:

1.Unusually Tight Construction

2.Unconfined Space

3.Confined Space

The information on pages 5 through 7 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 outside 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 win- dows 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 7.

If your home does not meet all of the three criteria above, proceed to Determining Fresh-Air Flow for Fireplace Lo- cation on page 6.

Confined Space 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 communicating 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.

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VTGF33NR, CGEFP33PR, VTGF33PR specifications

Desa VTGF33PR, CGEFP33PR, and VTGF33NR are innovative heating solutions designed to enhance comfort and provide efficient warmth in various living spaces. These products are particularly popular for their advanced features, energy efficiency, and usability.

The Desa VTGF33PR is a natural gas vent-free infrared heater that showcases a sleek design and powerful performance. One of its standout features is its infrared technology, which allows for direct heating by warming surfaces in the room rather than just the air. This results in faster warmth and efficient energy use. The VTGF33PR also comes equipped with a thermostat, ensuring optimal temperature regulation and control over heating preferences. With a heating capacity of 33,000 BTUs, it is suitable for larger areas, providing consistent and reliable warmth even in larger spaces.

Moving on to the CGEFP33PR, this model operates on propane and combines both elegance and efficiency. This direct vent fireplace offers a unique balance between aesthetics and performance. The CGEFP33PR features a contemporary design, making it a stylish addition to modern homes. With its high-efficiency venting system, it ensures that combustion gases are safely expelled outside while maximizing heat output into the living space. It also showcases an adjustable flame feature, allowing users to set their desired ambiance while maintaining energy efficiency. Like the VTGF33PR, it includes a thermostat control for precise temperature adjustments.

Finally, the VTGF33NR is another noteworthy entry in Desa’s lineup. It operates similarly to the VTGF33PR, with a focus on infrared heating. However, the VTGF33NR distinguishes itself with its impressive portability and versatility. It is designed to be easy to install and relocate, making it a perfect choice for both homeowners and renters. Its space-saving design allows it to fit seamlessly into various room setups. This model also boasts a robust safety feature set, including an oxygen depletion sensor and an automatic shut-off mechanism, ensuring safe operation in any environment.

In summary, Desa’s VTGF33PR, CGEFP33PR, and VTGF33NR present a range of heating solutions that prioritize energy efficiency, safety, and user comfort. With advanced technologies such as infrared heating and sleek designs, these models stand out as practical solutions for any home looking to enhance its heating capabilities while maintaining modern aesthetics.