AIR for Combustion and Ventilation

VENTED NATURAL GAS LOGS

WARNING: This appliance shall not be installed in a con- fined space or unusually tight construction unless provisions are provided for adequate com- bustion and ventilation air. Read the following instructions to in- sure proper fresh air for this and other fuel-burning appliances in your home.

Today’s homes are built more energy effi- cient 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 com- bustion and ventilation.

Exhaust fans, fireplaces, clothes dryers, and fuel burning appliances draw air from the house to operate. You must provide ad- equate 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, NFPA 54/ANS Z223.1, Sec- tion 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 4 through 6 will help you classify your space and provide adequate ventilation.

Unusually Tight Construction

The air that leaks around doors and win- dows 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 de- fined as construction where:

a.walls and ceilings exposed to the outside atmosphere have a con- tinuous water vapor retarder with a rating of one perm (6x10-11kg per pa-sec-m2) or less with open- ings 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, be- tween sole plates and floors, be- tween wall-ceiling joints, be- tween wall panels, at penetra- tions for plumbing, electrical, and gas lines, and at other openings.

If your home meets all of the three criteria above, you must provide ad- ditional fresh air. See Ventilation Air From Outdoors, page 6.

If your home does not meet all of the three criteria above, proceed to De- termining Fresh-Air Flow For Appli- ance Location, page 5.

Confined and Unconfined Space

The National Fuel Gas Code, ANS Z223.1 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 aggre- gate 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 con- sidered a part of the unconfined space.

This log set shall not be installed in a con- fined space or unusually tight construction unless provisions are provided for adequate combustion and ventilation air.

*Adjoining rooms are communicating only if there are doorless passageways or ventila- tion grills between them.

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VVMR18, VVMR24 specifications

Desa VVMR18 and VVMR24 are advanced solutions designed to enhance the efficiency of commercial and industrial heating systems. These models represent a significant leap in technology within the realm of industrial heaters, emphasizing energy efficiency, reliability, and user-friendly operation.

One of the main features of both the VVMR18 and VVMR24 models is their highly efficient heat exchange technology. The design incorporates a compact heat exchanger that maximizes thermal efficiency while minimizing energy waste. This means that users can not only save on operational costs but also reduce their carbon footprint, aligning with global sustainability goals.

The VVMR series utilizes advanced control systems that allow for precise temperature regulation and monitoring. These control systems are equipped with intelligent algorithms that adapt to varying load demands and external conditions, ensuring optimal performance at all times. This feature is particularly beneficial in environments where temperature fluctuations are common, providing stable heating without the need for constant manual adjustment.

In terms of construction, both models boast robust builds, designed to withstand the rigors of industrial use. The use of high-quality materials enhances durability and longevity, reducing maintenance requirements and extending the lifespan of the units. Additionally, their modular design facilitates easy installation and servicing, which is critical in industrial settings where downtime can be costly.

Safety is another critical characteristic of the VVMR18 and VVMR24 models. They come equipped with multiple safety features, including over-temperature protection and pressure relief systems, ensuring reliable operation without compromising on safety. These features are essential in industrial environments where safety regulations are paramount.

In conclusion, the Desa VVMR18 and VVMR24 offer a blend of efficiency, advanced technology, and robust design. Their intelligent control systems, efficient heat exchange technology, and focus on safety make them ideal choices for businesses seeking reliable heating solutions. Investing in these models not only supports operational efficiency but also promotes a commitment to environmental responsibility, making them a wise choice for modern industrial applications.