AIR for Combustion Ventilation | Desa VFRMV24NB, VFRMV24PB specification

AIR FOR COMBUSTION

AND VENTILATION

Continued

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 sup- plied with grills or openings, add the volume of these rooms to the total volume of the space.

2.Multiply the space volume by 20 to determine the maximum Btu/Hr the space can support.

____________(volume of space) x 20 = (Maximum Btu/Hr the space can support) Example: 2560 cu. ft. (volume of space) x 20 = 51,200 (maximum Btu/Hr the space can support)

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

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

*Do not include direct-vent gas appliances. Direct-vent draws combustion air from the outdoors and vents to the outdoors.

Example:		40,000
Gas water appliance		40,000	Btu/Hr
Vent-free appliance	+	33,000	Btu/Hr
Total	=	73,000	Btu/Hr

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)

73,000 Btu/Hr (actual amount of Btu/Hr used)

The space in the previous 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 adjoining room or add ventilation grills between rooms.

See Ventilation Air From Inside Building.

B.Vent room directly to the outdoors. See Ven- tilation Air From Outdoors, page 8.

C.Install a lower Btu/Hr appliance, 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:Iftheareainwhich 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, ANSI Z223.1/NFPA54 Section 5.3 or applicable local codes.

VENTILATION AIR

Ventilation Air From Inside Building

This fresh air would come from an adjoining un- confined space. When ventilating to an adjoining unconfined space, you must provide two perma- nent openings: one within 12" of the ceiling and one within 12" of the floor on the wall connecting the two spaces (see options 1 and 2, Figure 2 on page 8). You can also remove door into adjoining room (see option 3, Figure 2). Follow the National Fuel Gas Code, ANSI Z223.1/NFPA 54, Section 5.3, Air for Combustion and Ventilation for re- quired size of ventilation grills or ducts.

116412-01B

www.desatech.com

VFRMV18PB, VFRMV18NB, VFRMV24NB, VFRMV24PB specifications

The Desa VFRMV series is a sophisticated line of heating solutions known for its efficiency and modern design. The models in this series include the VFRMV24NB, VFRMV24PB, VFRMV18NB, and VFRMV18PB, each sharing a commitment to provide superior comfort and versatility in various living spaces.

One of the most notable features of the VFRMV series is its advanced heating technology. These units are equipped with a powerful burner system designed to maximize heat output while minimizing energy consumption. This makes the units not only environmentally friendly but also cost-effective, as users can enjoy warm indoor spaces without incurring high energy bills. The gas burners achieve a high thermal efficiency, ensuring that a significant amount of heat is delivered into the room promptly.

The VFRMV series is designed with customer convenience in mind. The models feature easy-to-read digital displays that allow users to adjust temperatures and settings effortlessly. These displays are intuitive, providing feedback on heating levels, operational status, and timer functions, enhancing the user experience. Furthermore, the inclusion of a remote control option allows homeowners to manage the heating from the comfort of their sitting area.

In terms of safety, the VFRMV series implements several key features. Each unit is equipped with an oxygen depletion sensor and a safety shut-off system. This ensures that the unit operates safely within its designated space, automatically shutting down if carbon monoxide levels rise or oxygen levels drop beyond safe limits. This commitment to safety provides peace of mind for households, making it a suitable choice for a wide range of environments.

Aesthetically, the VFRMV24NB and VFRMV24PB models feature a sleek design, with the "NB" models showcasing a bold black finish, while the "PB" variants offer a more classic propane-blue coloration. The smaller VFRMV18 series similarly combines elegance with functionality, ensuring that they can seamlessly blend into any home décor.

In summary, the Desa VFRMV24NB, VFRMV24PB, VFRMV18NB, and VFRMV18PB models exemplify modern heating solutions. With their advanced burner technology, user-friendly features, stringent safety measures, and stylish designs, they cater to contemporary requirements for effective indoor heating. Whether for residential or commercial use, the VFRMV series promises reliability and comfort all year round.

Desa VFRMV24NB, VFRMV24PB, VFRMV18NB, VFRMV18PB AIR for Combustion Ventilation, Ventilation AIR

Models: VFRMV18PB VFRMV18NB VFRMV24NB, VFRMV24PB