3Installing the Fireplace
Constructing the Chase
A chase is a vertical
CAUTION: TREATMENT OF FIRESTOP SPACERS AND CONSTRUCTION OF THE CHASE MAY VARY WITH THE TYPE OF BUILDING. THESE INSTRUCTIONS ARE NOT SUBSTITUTES FOR THE REQUIREMENTS OF LOCAL BUILDING CODES. THEREFORE, YOUR LOCAL BUILD- ING CODES MUST BE CHECKED TO DETERMINE THE REQUIREMENTS FOR THESE STEPS.
This means that the walls, ceiling, base plate and cantilever floor of the chase should be insulated. Vapor and air infiltra- tion barriers should be installed in the chase as per regional codes for the rest of the home. Additionally,
To further prevent drafts, the firestops should be caulked to seal gaps. Gas line holes and other openings should be caulked or stuffed with insulation. If the unit is being in- stalled on a cement slab, we recommend that a layer of plywood be placed underneath to prevent conducting cold up into the room. Be sure to include spark arrestors for woodburning units if they are required.
THE CHASE SHOULD BE CONSTRUCTED SO THAT ALL CLEARANCES TO THE FIREPLACE ARE MAINTAINED AS SPECIFIED WITHIN THIS INSTALLERS GUIDE.
Step 1. Locating the Fireplace
Space and clearance requirements for locating a fireplace within a room (see Figure 2).
Clearance Requirements
The top, back, and sides of the fireplace are defined by
The metal ends of the fireplace may NOT be recessed into combustible.
36” | 36” |
| 36” |
Figure 2. | Fireplace Dimensions and Locations |
Minimum Clearances
from the Fireplace to Combustible Materials
| Inches | mm |
Glass Sides or Ends | .......... 36 | 914 |
Floor | 0 | 0 |
Rear Vent | 0 | 0 |
Metal Sides or Ends | 0 | 0 |
Top | 3 1/2 | 89 |
Ceiling* | 36 | 914 |
*The clearance to the ceiling is measured from the top of the unit, excluding the standoffs (see Figure 32).
Minimum Clearances
from the Vent Pipe to Combustible Materials
| Inches | mm |
Vertical Sections | 1 | 25 |
Horizontal Sections |
|
|
Top | 3 | 75 |
Bottom | 1 | 25 |
Sides | 1 | 25 |
At Wall Firestops |
|
|
Top | 2 1/2 | 63.7 |
Bottom | 1/2 | 13 |
Sides | 1 | 25 |
The distance from the unit to combustible construction is to be measured from the unit outer wrap surface to the com- bustible construction, NOT from the screw heads that se- cure the unit together.
For minimum clearances of direct vent termination (see Fig- ures 24 and 25).
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