Hearth and Home Technologies BIR42 owner manual Chimney Requirements, Height of Chimney Components

A. Chimney Requirements

Measure vertical distances from the base of the fireplace as shown in Figure 8.2.

• Minimum overall straight height		18 ft	(5.5 m)
• Minimum height with offset/return		18.5 ft	(5.64 m)
•	Maximum height	90 ft	(27.43 m)
• Maximum chimney length between an offset		20 ft	(6.1 m)
	and return
•	Maximum distance between chimney	35 ft	(10.67 m)
	stabilizers
• Maximum unsupported chimney length		6 ft	(1.83 m)
	between the offset and return
• Maximum unsupported chimney height above		35 ft	(10.67 m)
	the fireplace
•	Maximum unsupported chimney above roof	6 ft	(1.83 m)

WARNING! Risk of Fire! You must maintain 2 in. (51 mm) air space clearance to insulation and other combustible materials around the chimney system. Failure to do so may cause overheating and fire.

Determine the chimney components needed to complete your particular installation:

•Measure the total vertical height of the fireplace installation from the base of the fireplace assembly to the approximate location of the bottom of the termination cap.

•Subtract the effective height of the fireplace assembly (see Figure 8.2) from the total vertical height to determine the overall height of the chimney installation.

•Create a schematic for your application similar to Figure 8.2 showing components required (referring to Table 8.1). Figure 8.1 identifies those components and where used.

•Install a ceiling firestop whenever the chimney penetrates a floor/ceiling.

NOTICE: A maximum of one offset and return may be used.

CAUTION! Risk of Fire and/or Asphyxiation! DO NOT connect this fireplace to a chimney flue servicing another appliance. Do NOT connect to any air distribution duct or system. These actions could cause overheating/fire in the chimney flue, or release of exhaust fumes into the living areas.

Table 8.1

HEIGHT OF CHIMNEY COMPONENTS		in.	mm
Chimney Stabilizer
	SL11	4-3/4	121
Ceiling Firestops
	FS538	0	0
	FS540	0	0
Offsets/Returns
	SL1130	18	457
Roof Flashing
	RF570	0	0
	RF571	0	0
Chimney Sections*
	SL1106	4-3/4	121
	SL1112	10-3/4	273
	SL1118	16-3/4	425
	SL1136	34-3/4	883
	SL1148	46-3/4	1187
* Dimensions reflect effective height.

20 ft (6.10 m) max. pipe between an offset & return

Ceiling firestop

97 1/2 in.

(2477 mm)

Effective

Height

6 ft (1.83 m) max. unsupported chimney above roof

35 ft (10.7 m) max. straight unsupported chimney height

14-11	18.5 ft (5.64 m)
Transition	min. height
	single offset-return
	90 ft (27.4 m)
	max. height

Figure 8.2 Chimney Requirements

Heatilator • Birmingham BIR42 • 4059-308 F • 11/08 25