Majestic STR42, CVR42 manual Planning Information, Mounting the Fireplace, Planning the Chimney Run

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STR/CVR Series Woodburning Fireplaces

Planning Information

Preplanning an installation is very important to ensure safety and to save time and money. An installer must predetermine where a fireplace will be set and how the chimney system will be run.

NOTE: STR33/36 and CVR36 models use CFM Cor- poration SK8 (2-wall) chimney systems. STR/CVR42 Fireplaces use only model 11CF chimney system.

Mounting the Fireplace

A fireplace may only be mounted on the following sur- faces:

1.A flat combustible surface.

2.A raised wooden platform.

3.A concrete block or other solid object placed beneath each of the four (4) corners of the fireplace.

The fireplace must be spaced 1/2" (13mm) from a com- bustible back wall and 1/2" (13mm) from a combustible

side wall or support. (Page 14, Fig. 20)

Planning the Chimney Run

Determine how the chimney will be run, length of run and chimney components required to complete the job. (Fig. 6) Never install a chimney below minimum heights.

L

 

T

 

MODEL SK &

TOTAL

INSTALLED

 

 

 

MODEL 11 CF

LENGTH

LENGTH

 

 

 

2 WALL CHIMNEY

(LT)

(L1)

 

 

 

 

 

 

L

 

1

 

SK81 / 11CF1

�����"

�����"

 

 

 

 

 

SK818 / 11CF18

�����"

�����"

 

 

 

 

 

 

L

 

 

 

SK83 / 11CF3

�����"

�����"

 

 

 

 

 

1

 

SK84 / 11CF4

�����"

�����"

 

 

 

 

 

 

 

 

FP705

Fig. 6 Installed lengths of chimney sections.

In planning a chimney system, it is important to know:

1.The height of a chimney is measured from the hearth to the exit point on the termination.

2.A chimney cannot be offset more than 30° from a vertical plane.

3.A chimney may run straight up or it may be neces- sary to offset it to avoid obstructions.

4.The maximum length of an angled run (total chimney system) is 20' (6m).

5.No more than 2 offsets (4 total 30˚ elbows in U.S./or 2 total 45° elbows in Canada) per fireplace may be used.

6.A guy wire stabilizer is required for chimneys extend- ing more than 6' (1.8m) above a roof line.

The Ten Foot Rule

Major U.S. building codes specify a minimum chimney height above the roof top. The “Ten Foot Rule” is a fire safety rule and not a draft rule. To ensure proper draft, it is recommended that you always meet or exceed the “Ten Foot Rule,” especially when installing a termination on a high pitch roof. (Fig. 7)

The key points of the "Ten Foot Rule" are:

1.If the horizontal distance from the chimney to the peak of the roof is 10' (3m) or less, the top of the chimney must be at least 2' (610mm) above the peak of the roof, but never less than 3' (914mm) in height above the highest point where it passes through the roof.

2.If a horizontal distance from the chimney to the peak of the roof is more than 10' (3m), a chimney height reference point is established on the surface of the roof a distance of 10' (3m) from the chimney in a horizontal plane. The top of the chimney must be at least 2' (610mm) above the reference point, but never less than 3' (914mm) in height above the high- est point where it passes through the roof.

0 To 10'

 

2' Min. 3'

0 To 10'

Min.

 

 

2' Min. 3'

 

Min.

Reference

Point

AC246

Fig. 7 Ten Foot Rule illustration.

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Contents STR/CVR Series Table of Contents Safety InformationCVR Series Woodburning Fireplace STR Series Woodburning FireplaceSTR/CVR Series Woodburning Fireplace Chase Installation Illustration Key 30˚ Elbow OffsetsTen Foot Rule Planning InformationMounting the Fireplace Planning the Chimney RunInsulating Fireplace Enclosure for Cold Climates InstallationChase Installation Chimney SupportsChimney Set-up Straight-Up Chimney InstallationOffset Installation FramingCutting the Hole Ceiling Chimney Hole Possible ObstructionsFraming the Ceiling Hole Outside Air Kit Positioning, Safety Strips Securing the FireplaceInstalling the Firestop Spacer Ceiling Hole Installing the Chimney SystemProper Firestop Spacer Installation Penetrating the Roof Continue Installing Pipe to Complete RunCanadian Requirements For Insulation Shield Additional CeilingsAir Space Clearances Install Remainder of Chimney SectionsInstalling Top Housing or Termination Installing Chimney In a ChaseSTR/CVR Series Woodburning Fireplaces Examples of wall shield insulation Side Wall ProtectionHearth Installation Minimum Hearth Extension DimensionsMinimum Wall Clearances Common Materials and Factors Gas line access Installing Line for Gas LogsCVR36/42 Series STR33/36/42 Series 33GDKDP STR33 36GDKDP STR36 42GDKDP STR42 AccessoriesRLTSK8 Chimney ComponentsChimney Components, contd STR/CVR Series Woodburning Fireplaces STR/CVR Series Woodburning Fireplaces For Majestic Fireplaces PRE-ENGINEERED Fireplace Systems Limited Warranty & 30 Year Protection PlanCFM Corporation