Desa B, C, CFS24NVC VS30N AIR for Combustion and Ventilation, Providing Adequate Ventilation

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DESA INTERNATIONAL

UNVENTED NATURAL GAS LOG HEATER

AIR FOR COMBUSTION AND VENTILATION

WARNING: This heater shall not be installed in a confined space or unusually tight construction unless provisions are provided for adequate combustion and ven- tilation air. Read the following in- structions to insure 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 (6 x 10-11kg 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 Deter- mining Fresh-Air Flow For Heater Location, page 5.

Confined and Unconfined Space

The National Fuel Gas Code (ANS Z223.1, 1992 Section 5.3) 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 in- stalled*, through openings not furnished with doors, are considered a part of the unconfined space.

This heater 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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Contents Unvented VENT-FREE Natural GAS LOG Heater What to do if YOU Smell GASSafety Information Desa International Unvented Natural GAS LOG HeaterProduct Features Product IdentificationLocal Codes UnpackingAIR for Combustion and Ventilation Providing Adequate VentilationUnusually Tight Construction Confined and Unconfined SpaceDetermining FRESH-AIR Flow for Heater Location AIR for Combustion VentilationDetermining if You Have a Confined or Unconfined Space Ventilation AIR Ventilation Air From InsideBuilding Ventilation Air From OutdoorsInstallation Installation ClearancesCheck GAS Type Vent-Free Operation OnlyIf Using Mantel Minimum Noncombustible Material ClearancesDetermining Minimum Mantel Clearance When Using a Hood Mantel ClearancesFloor Clearances Determining Minimum Mantel ClearanceInstalling Damper Clamp Accessory for Vented Operation Installing Heater Base AssemblyInstallation Items Needed Area of Various Standard Round FluesConnecting to GAS Supply Attaching Flexible Gas Hose to Heater Gas RegulatorPressure Testing Heater Gas Connections Pressure Testing Gas Supply Piping SystemChecking GAS Connections Installing Logs Operating Heater For Your Safety Read Before LightingLighting Instructions Manual Lighting Procedure To Turn OFF GAS To ApplianceThermostat Control Operation Shutting Off HeaterVariable Control Operation Pilot Flame Pattern Inspecting BurnersFront Burner Flame Pattern Cleaning Burner Injector Holder and Pilot AIR Inlet Hole Cleaning and MaintenanceLogs Troubleshooting Observed Problem Possible Cause RemedyMaintenance, Gas leak. See Warning statement at Optional Positioning of Thermostat Sensing Bulb For Masonry and FACTORY-BUILT Metal FireplaceSpecifications Replacement PartsService Hints Technical ServiceIllustrated Parts Breakdown Variable Manually Controlled Split OAK ModelsParts List Variable MANUALLY- Controlled Split OAK ModelsDesa International Unvented Natural GAS LOG Heater THERMOSTAT- Controlled Split OAK Models VS18NTB VS24NTB VS30NTBAccessories 104414 Warranty Information International

CFS24NVC VS30N, B, C specifications

Desa CFS24NVC VS30N, B, C is a sophisticated heating solution designed to deliver comfort and efficiency in various settings. This series is particularly noted for its advanced features and technologies that cater to user needs while ensuring optimal performance.

One of the standout characteristics of the CFS24NVC series is its versatility in operation. Whether it is a larger commercial space or a cozy residential area, these heaters can adapt their output to suit different environments. The VS30N model, for instance, provides a strong heating capacity, making it ideal for workshops or larger living spaces. The adjustable settings allow users to match the heater's performance with the current requirements, promoting energy efficiency and cost savings.

Furthermore, the CFS24NVC series employs advanced heating technologies that enhance performance. The inclusion of ceramic heating elements enables rapid heat distribution, ensuring that spaces are warmed up quickly. This technology not only improves efficiency but also enhances comfort by providing consistent warmth throughout the room without cold spots.

In terms of design, the CFS24NVC VS30N, B, C models prioritize user-friendliness. They come equipped with intuitive controls, allowing for easy adjustments to temperature and settings. Many users appreciate the digital displays which provide real-time feedback on performance and help monitor energy consumption.

Safety is also a core feature of the CFS24NVC series. The units are fitted with multiple safety mechanisms, including overheating protection and tip-over switches, which automatically power down the heater in case of accidents. This ensures peace of mind for users, making them suitable for use in families with children or pets.

Moreover, the CFS24NVC series is engineered with durability in mind. Constructed from high-quality materials, these heaters are built to withstand daily wear and tear, ensuring longevity in performance.

In conclusion, the Desa CFS24NVC VS30N, B, C series stands out in the heating market for its combination of versatility, advanced heating technologies, user-friendly design, and robust safety features. This series is an excellent choice for consumers looking for reliable, efficient heating solutions suitable for diverse applications.
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