VENTING INSTALLATION

OPTIONAL OUTSIDE AIR KIT (MODEL AK4/AK4F)

Installation of outside air kit should be performed during rough framing of fireplace due to the nature of it's location. Outside combustion 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

FMI PRODUCTS, LLC chimney system consists of 12", 18", 24", 36" and 48" snap- lock, double-wall pipe segments, planned for maximum adaptability to individual site requirements. 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"*

RTL-8DM

Round Termination

7 3/4"*

RLT-8DM

Round Termination

7 1/2"*

RTT-8DM

Round Termination

6 7/8" to

with Slip Section

23 1/8"*

 

RTTL-8DM

Round Termination

8 1/2" to

with Slip Section

21 1/2"*

 

RLTT-8DM

Round Termination

7 1/2" to

with Slip Section

21 1/4"*

 

ET-8DM

Square Chase-Top

12"*

ETO-8DM

Square Chase-Top

12"*

 

with Mesh

 

 

 

ETL-8DM

Square Chase-Top

7" to 15"*

with Slip Section

 

 

 

Square Chase-Top

12" to

ETLO-8DM

with Mesh & Slip

25 1/2"*

 

 

 

Section

 

 

 

 

*The lineal gain for the terminations is measured to the flue gas outlet height.

Figure 8 - Lineal Gain

109036-01M

www.fmiproducts.com

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