Desa (V)B36I, (V)B36L Venting Installation, Optional Outside air Kit Model AK4/AK4F, Chimney Pipe

Venting Installation

Optional Outside air Kit (Model AK4/AK4F)

Installation of outside air kit should be per- formed during rough framing of fireplace due to the nature of it's location. Outside combus- tion air is accessed through a vented crawl space (AK4F) or through a sidewall (AK4). See Figure 24 on page 15 for instruction of operating air kit.

CAUTION: Combustion air inlet ducts shall not terminate in attic space.

The maximum height for the air vent can not exceed 3 feet below the flue gas outlet of the termination.

Secure to Collars with Metal Tape, Screws or Straps (Min. of 1/4" x 20" in size)

	Air Inlet
	Location
	Must Allow
	For Bushes
	or Snow
		Air Inlet
Vented Crawl Space		Eyebrow
		Vent Hood
(Check Local Codes
		Required for
Before Installing in a
		Wall Installation
Vented Crawl Space)
Figure 7 - Outside Air Kit

Chimney Pipe

DESA Heating, LLC chimney system con- sists of 12", 18", 24", 36" and 48" snap-lock, double-wall pipe segments, planned for maximum adaptability to individual site re- quirements. Actual lengths gained after fitting overlaps must be taken into consideration (lineal gain) and are given in lineal gain chart (see Figure 8).

Lineal gain is actual measurable length of a part after two or more parts are connected.

WARNING: The opening in collar around chimney at top of fireplacemustnotbeobstructed. Never use blown insulation to fill chimney enclosure.

12 3/8" Galvanized Outer Pipe

				Hemmed
8" Stainless				End
Inner Pipe
	LINEAL GAIN
PART NO.	DESCRIPTION			GAIN
36"		Fireplace		37 1/2"
12-8DM		Pipe Section		10 5/8"
12-8HT
18-8DM		Pipe Section		16 5/8"
18-8HT
24-8DM		Pipe Section		23 5/8"
24-8HT
36-8DM		Pipe Section		34 5/8"
36-8HT
48-8DM		Pipe Section		46 5/8"
48-8HT
RT-8DM	Round Termination			6 7/8"*
RT-8HT
RTL-8DM	Round Termination			7 3/4"*
RTL-8HT
RTT-8DM	Round Termination			6 7/8" to
RTT-8HT	with Slip Section			23 1/8"*
RTTL-8DM	Round Termination			8 1/2" to
RTTL-8HT	with Slip Section			21 1/2"*
ET-8DM	Square Chase-Top			12"*
ET-8HT
ETO-8DM	Square Chase-Top			12"*
		with Mesh
ETL-8DM	Square Chase-Top			7" to 15"*
ETL-8HT	with Slip Section
	Square Chase-Top			12" to
ETLO-8DM	with Mesh & Slip
				25 1/2"*
			Section

*The lineal gain for the terminations is mea- sured to the flue gas outlet height.

Figure 8 - Lineal Gain

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