Hearth and Home Technologies BIR42-B Chimney Requirements, Height of Chimney Components

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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

18.5ft

(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

 

 

• Maximumunsupportedchimneyheightabove

35 ft

(10.67 m)

the fireplace

 

 

• Maximum unsupported chimney above roof

6 ft

(1.83 m)

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.

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.

Table 8.1

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.

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-B • 4059-681• 11/11

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Contents Fire Risk Hot screen/mesh and glass doors will cause burnsGrate Listing Label Information/LocationNumber Table of Contents Limited Lifetime Warranty  WarrantyWarranty Conditions Appliance Certification Listing and Code ApprovalsNon-combustible Materials Combustible MaterialsYour Fireplace Operating InstructionsStarting a Fire Seasoned WoodGrate FirescreenVented Gas Log Sets & Gas Log Lighters Glass DoorsOptional Components Clear SpaceHardwood vs Softwood Wood FuelChimney Inspection/Cleaning Maintenance and ServiceDisposal of Ashes Check Firebox Molded Brick Panel Glass CleaningInspect Grate Frequency As desiredStart Fire Problems Possible Cause Solution Troubleshooting GuideTypical Fireplace System Getting StartedDraft Design and Installation ConsiderationsNegative Pressure Windward Locating your Fireplace & ChimneyTypical Fireplace Components Tools and Supplies Needed Inspect Fireplace and ComponentsSelect Fireplace Location Framing & ClearancesModel # Air Space Clearances ClearancesFrame the Fireplace Sidewalls/SurroundsThings to Consider Installation of FireplacePosition the Fireplace Place Protective Metal Hearth StripsYES Outside Air Installation Install Outside Air KitChimney Assembly Height of Chimney Components Chimney RequirementsExample Using Offsets/ReturnsAssembling Chimney Sections Assemble Chimney SectionsInstalling the Ceiling Firestop Install Ceiling FirestopsPrepare Attic Insulation Shield Install Attic Insulation ShieldInstall Flashing Complete InstallationCut Out Hole in Roof Flat Roofs Chimney Termination RequirementsConstruct the Chase Chase InstallationsInstall Chase Top Install Fireplace & ChimneyST1175 Square Termination Cap Install Termination CapTCT1175 Terra Cotta Cap Radiation Shield ShroudsField Constructed Shrouds Mailbox Style Shroud radiation shield required Install Hearth Molded Brick Panel Installation of Molded Brick PanelInstall Back Molded Brick Panel/Traditional Install Side Molded Brick Panel/TraditionalInstall Side Molded Brick Panel Herring- bone Install Back Molded Brick Panel Herring- boneInstall Mortar Optional Install ScreensHearth Extension Finishing= 1/k x inches of thickness Framing Material Non-combustibleEquivalent insulation Finishing MaterialsNon-combustible Sealant Use only non-combustible framing material below standoffs Finishing MaterialStandoffs Combustible MantelAngle Gas Log/Lighter Provision AccessoriesWood Burning Inserts Gas Code, Ansi Z223.1Reference Materials Fireplace DimensionsID6 Insulated Duct Catalog # Chimney Components15-1/4 387 mm 31-3/4 806 mm 34-5/8 879 mm Heatilator Birmingham BIR42-B 4059-681 11/11 Herringbone Refractory Service PartsContact Information

BIR42-B specifications

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