Venting Installation

Optional Outside air Kit (Model ak4/ak4f)

The installation of an outside air kit should be performed during the rough framing of the 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).

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

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

Air Inlet

Location

Must Allow For Bushes or Snow

 

Air Inlet

 

Eyebrow

Vented Crawl Space

Vent Hood

Required for

(Check Local Codes

Wall Installation

Before Installing in a

 

Vented Crawl Space)

 

Figure 5 - Outside Air Kit

Chimney Pipe

The 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 the lineal gain chart (see Figure 6). Lineal Gain is the actual measurable length of a part after two or more parts are connected. For Canada, use chimney parts designated "HT".

WARNING: The opening in the collar around the chimney at the top of the fireplace must not be obstructed. Never use blown insulation to fill the chimney enclosure.

LINEAL GAIN

PART NO.

DESCRIPTION

GAIN

Georgian

Fireplace

66 1/2"

12-12DM

Pipe Section

10 5/8"

12-12HT

 

 

18-12DM

Pipe Section

16 5/8"

18-12HT

 

 

24-12DM

Pipe Section

23 5/8"

24-12HT

 

 

36-12DM

Pipe Section

34 5/8"

36-12HT

 

 

48-12DM

Pipe Section

46 5/8"

48-12HT

 

 

RLT-12D

Round Termination

7 3/4"*

RLT-12HT

 

 

STL-12D

Square Chase-Top

7" to 15"*

 

with Slip Section

 

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

15" Galvanized

Outer Pipe

12 3/8"

Hemmed

Stainless

End

 

Inner Pipe

 

Figure 6 - Lineal Gain

Assembly and installation of double wall chimney system

Each double wall chimney section consists of a galvanized outer pipe, a stainless steel inner flue pipe and a wire spacer. Pipe sections must be assembled independently as chimney is installed. When connecting chimney directly to fireplace, the inner flue pipe section must be installed first with lanced side up. The outer pipe section can then be installed over the flue pipe section with hemmed end up. Press down on each pipe section until lances securely engage hem on fireplace starter. The wire will assure the proper spacing between inner and outer pipe sections.

Continue to assemble chimney sections as outlined above, making sure that both inner and outer pipe sections are locked together. When installing double wall snap-lock chimney to- gether, it is important to assure the joint between chimney sections is locked. Check by pulling chimney upward after locking. The chimney will not come apart if properly locked. It is not necessary to add screws to keep the chimney together (exception, see Figure 9, page 9).

109493-01R

www.fmiproducts.com

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