AIR for

AIR FOR	DETERMINING AIR FLOW FOR FIREPLACE LOCATION
COMBUSTION	Determining if You Have a Confined or Unconfined Space
COMBUSTION	Use this work sheet to determine if you have a confined or unconfined space.
AND
AND	Space: Includes the room in which you will install fireplace plus any adjoining rooms
VENTILATION	with doorless passageways or ventilation grills between the rooms.
VENTILATION	1. Determine the volume of the space (length x width x height).
Continued
Continued	Length x Width x Height =		___________________ cu. ft. (volume of space)
	Length x Width x Height =		___________________ cu. ft. (volume of space)
	Example:	Space size 22 ft. (length) x 18 ft. (width) x 8 ft. (ceiling height) =
		3168 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: 3168 cu. ft. (volume of space) ÷ 50 cu. ft. = 63.3 or 63,300 (maximum
		Btu/Hr the space can support)
	3. Add the Btu/Hr of all fuel burning appliances in the space.
		Vent-free fireplace			___________________ Btu/Hr
		Gas water heater*			___________________ Btu/Hr
		Gas furnace			___________________ Btu/Hr
		Vented gas heater			___________________ Btu/Hr
		Gas fireplace logs			___________________ Btu/Hr
		Other gas appliances*		+ ___________________ Btu/Hr
		Total		= ___________________ Btu/Hr
	Example:	Gas water heater			40,000		Btu/Hr
		Vent-free fireplace		+	28,000		Btu/Hr
		Total		=			Btu/Hr
		Total		=		68,000	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: 63,300	Btu/Hr (maximum the space can support)
68,000	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 work sheet, 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, page 8.

B.Vent room directly to the outdoors. See Ventilation Air from Outdoors, page 8.

C.Install a lower Btu/Hr fireplace, 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

WARNING ICON

G 001

You must provide additional ventilation air in a confined space.

Continued 7

101969

UNVENTED (VENT-FREE) PROPANE GAS FIREPLACE specifications

Desa Unvented (Vent-Free) Propane Gas Fireplaces offer a unique and efficient way to provide warmth and ambiance to any living space, without the need for traditional venting systems. These fireplaces are designed to burn propane gas cleanly and efficiently, thus eliminating the need for chimneys or flues. One of the key features of the Desa Unvented propane gas fireplace is its ability to operate without exhausting combustion gases outside, making it an ideal choice for homeowners with limited installation options.

Equipped with advanced safety features, these fireplaces come with oxygen depletion sensors that automatically shut off the unit if oxygen levels in the room decrease to unsafe levels. This ensures peace of mind for users, as safety is a top priority when it comes to heating solutions.

Energy efficiency is another significant aspect of the Desa Unvented propane gas fireplace. These units convert almost all of the fuel they burn into usable heat, which translates into lower energy bills and a smaller carbon footprint. The fireplaces also have adjustable flame settings, allowing users to customize their heating needs according to the room's size and desired warmth.

Aesthetic appeal is paramount in any home heating solution, and Desa offers a variety of styles and designs to suit different interior decors. Whether you prefer a classic look with ceramic logs and glowing embers or a contemporary clean-burning design, there is a model to meet your preferences. With remote control options available, users can easily adjust the heat and flame settings from the comfort of their couch.

Installation is hassle-free, as these units do not require complex venting. This flexibility allows homeowners to place the fireplace in various locations, ensuring that any room can benefit from the charm and warmth of a gas fire. With the additional option to incorporate a wall-mounted thermostat, users can maximize efficiency while maintaining the ideal room temperature.

In summary, the Desa Unvented propane gas fireplace combines safety, efficiency, and style, making it an attractive option for those looking to enhance their home environment. Its innovative technology and user-friendly features set it apart as a reliable and aesthetically pleasing heating solution.

DETERMINING AIR FLOW FOR FIREPLACE LOCATION

COMBUSTION

Determining if You Have a Confined or Unconfined Space

VENTILATION

Example:

Example: 63,300

UNVENTED (VENT-FREE) PROPANE GAS FIREPLACE specifications