AIR for Combustion Ventilation | Desa CVDR18, CPVSR18, CVDR24, CVSR18

OWNER’S MANUAL

AIR FOR

COMBUSTION AND

VENTILATION

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DETERMINING FRESH-AIR FLOW FOR APPLIANCE 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 appliance 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.Divide the space volume by 50 cubic feet to determine the maximum Btu/Hr the space can support.

_____________ (volume of space) ÷ 50 cu. ft. = (maximum Btu/Hr the space can support)

Example: 2560 cu. ft. (volume of space) ÷ 50 cu. ft. = 51.2 or 51,200 (maximum Btu/Hr the space can support)

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

Gas fireplace logs		_____________ Btu/Hr
Gas water heater*		_____________ Btu/Hr
Gas furnace		_____________ Btu/Hr
Vented gas heater		_____________ Btu/Hr
Vent-free heater		_____________ Btu/Hr
Other gas appliances* +		_____________ Btu/Hr
Total	=	_____________ Btu/Hr

Example:
Gas water heater		40,000 Btu/Hr
Gas fireplace logs +		55,000 Btu/Hr
Total	=	95,000 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)

95,000 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 appliance 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, ANS Z223.1, 1992, Section 5.3 or applicable local codes.

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901048

CPVSR18, and CVDR30, CPVSR24, CVSR24, CVDR24 specifications

Desa CVSR18, CVDR18, CVDR24, CVSR24, and CPVSR24 are a range of advanced heating solutions designed for various industrial and commercial applications. These systems combine a sophisticated blend of technology, efficiency, and ease of use, making them ideal for maintaining optimal thermal comfort.

The CVSR and CVDR series feature a unique vertical design that maximizes space efficiency while ensuring powerful heating capabilities. The model names indicate their heating capacities, with CVSR18 and CVDR18 offering output ratings of 18 kW, and the CVDR24 and CVSR24 providing a robust 24 kW. This scalability makes them suitable for a wide variety of environments, from large warehouses to smaller industrial facilities.

One of the key characteristics of these units is their high efficiency. Employing advanced combustion technology, the Desa heating systems reduce energy consumption while delivering superior heating performance. This not only translates to lower operational costs but also contributes to a reduced environmental footprint, aligning with contemporary sustainability goals.

The CVSR series utilizes a sealed combustion design, meaning that air is drawn from outside the building for combustion, improving indoor air quality and comfort. Meanwhile, the CVDR variants are designed for direct vent applications, allowing for flexible installation options. The direct vent feature ensures that exhaust gases are effectively expelled outside without interfering with indoor air circulation.

In addition to their energy efficiency and innovative design, the CPVSR24 model stands out due to its enhanced control capabilities. It includes smart technology integration that allows for remote monitoring and management, offering users greater control over their heating systems. This feature is particularly beneficial for businesses seeking to optimize operational efficiency by adjusting heating output based on real-time conditions.

Another notable aspect of these models is their durability. Constructed with robust materials, the Desa models are designed to withstand harsh operating conditions. Regular maintenance is made straightforward, ensuring longevity and reliability in performance.

Overall, Desa CVSR18, CVDR18, CVDR24, CVSR24, and CPVSR24 represent a comprehensive suite of heating solutions that prioritize performance, convenience, and sustainability. Their innovative features make them a strategic choice for those looking to enhance their heating systems while minimizing energy consumption and environmental impact.