45° ELBOWS STANDARD FIXED ANGLE

CAT. NO. MFG. NO. VENT SIZE EACH 5H181M

4MO45S 5H1811M 6MO45S

4” 6”

45° ELBOW FLAT FIXED ANGLE

CAT. NO. MFG. NO. VENT SIZE EACH 5H186M

4MO45F 4” $33.90

$33.90 $70.43

CHIMNEY TERMINATION

TYPE “B” GAS VENT OVAL PIPE

Designed for use with gas burning Category 1 appliances. Install with minimum 1” clearance to combustible material.

Double wall construction with aluminum alloy inner flue and outer casing of galvanized steel or galvalume steel.

4” oval fits 2” x 4” or 2” x 6” stud walls. 6” oval fits 2” x 6” stud wall.

CAT. NO. MFG. NO. VENT SIZE LENGTH EACH 5H188M 5H184M 5H180M 5H187M 5H185M 5H179M

4M018 4MO24 4MO3 4MO4 4M05

6M012

5H1841M 6MO24 5H1801M 6MO3 5H1851M 6MO5

4” 4” 4” 4” 4” 6” 6” 6” 6”

18” 24” 36” 48” 60” 12” 24” 36” 60”

$17.52 $23.87 $31.15 $33.55 $46.95 $36.79 $48.62 $55.93 $71.25

Note: Vent overlaps 1-1/2” when joined together, therefore assembled length is 1-1/2” less than listed length.

CAT. NO. MFG. NO. VENT SIZE 5H182M 5H183M

4MO

5H1821M 6MOR5 5H1831M 6MOR 5H1021M 6MOR

OVAL ADAPTERS 4MRO

A B-Vent Cap should be used on all installations to prevent back drafts and to keep out rain and debris. The vent must extend through a flashing, and should terminate with the lowest discharge opening no closer to the roof than the minimum height shown in the table below. These minimum heights may be used provided the vent is not less than 8” from any vertical wall. For installations not covered in the table, the lowest discharge opening of the vent cap should be at least 2 ft. above the highest point where it passes through the roof, and at least 2 ft. higher than any portion of a building within 10” horizontally. All gas vents extending above the roof more than 5 feet must be securely guyed and braced.

ROOF PITCH Flat to 7/12

Over 7/12 to 8/12 Over 8/12 to 9/12 Over 9/12 to 10/12

MINIMUM HEIGHT 1.0 ft. 1.5 ft. 2.0 ft. 2.5 ft.

Over 10/12 to 11/12 3.25 ft. Over 11/12 to 12/12 4.0 ft. Over 12/12 to 14/12 5.0 ft. Over 14/12 to 16/12 6.0 ft. Over 16/12 to 18/12 7.0 ft. Over 18/12 to 20/12 7.5 ft. Over 20/12 to 21/12 8.0 ft.

CONECTING “B” VENT TO 80% GAS FURNACES

How to connect double wall type B vent to the flue collars on 80% gas furnaces.

4” Round to 4” Oval 4” Oval to 4” Round 6” Oval to 5” Round 6” Oval to 6” Round 6” Round to 4” Oval

OVAL TEES Oval Pipe Tee

6” oval pipe connections on the run, 6” round B-vent connection on the branch.

CAT. NO. 4G8021M 6MOT

MFG. NO. DESCRIPTION EACH 6” Oval tee

$71.79

EACH $22.13 $22.13 $37.77 $37.77 $35.04

It is easy... 4” single wall smoke pipe will connect to the flue collar on the furnace. A piece of single wall pipe could be used and then the single wall pipe could be connected to Type B vent. Or a Type B vent “draft hood connector” matching the flue size of the furnace can be used. Without using the draft hood connector, the outer diameter of the “B” vent will not fit down into the pre-cut opening in the top/side of the furnace. The “draft hood connector” is basically a piece of double wall “B” vent pipe with the last 3” of outer wall removed from the inlet end of the pipe. This exposed, 3” length of single wall slips down over the flue collar, and inside the pre-cut opening, to make a nice neat fit to “B” vent.

R.E. Michel Company carries “draft hood connectors” for type “B” and type “L” vent, which can be found in this section of our catalog.

886 “B” Vent Gas Products

AIR HANDLING & VENTING PRODUCTS