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Miscellaneous Masonry Products: Fireplace And Chimney Products
1) Flue Linings
2) Dampers
3) Metal Air Circulators
4) Accessories
*Note: MIW currently recommends the information found in the Fireplace and Chimney Handbook
1. Flue Linings
1.1. Clay flue linings are manufactured according to ASTM Designation C 315-78c. Such flue linings are manufactured from fire clay, shale, surface clay, or a combination of these materials that when formed and fired to suitable temperatures, must yield a product that is strong, durable, and serviceable.
Flue lining
1.11 Clay lining shapes and sizes available in the Northwest.
|
8" x 8" |
Square, round |
| 8" x 12" | Oval |
| 8" x 16" | Rectangular |
| 12" x 12" | Square |
| 13" x 13" | Square |
| 12" x 16" | Rectangular |
| 16" x 16" | Square |
| 20" x 20" | Square |
Clay flue linings are 12 in. high and 5/8" minimum thick
1.2. Pumice flue linings are manufactured to conform to ICBO research report #2602. This lightweight lining is being manufactured in concrete masonry plants.
2. Dampers
Dampers (cast iron or heavy gauge steel) are designed to provide two functions: guide the smoke away from the fire and close out energy-stealing drafts when the fire is not lit.
2.1. Standard damper design requires a masonry throat, however permits studding close to the fireplace opening.
2.2. High-form dampers are usually provided with an
extra-wide throat for peak draft possibilities. Such dampers eliminate the need for difficult masonry construction and permit a deep down draft shelf design without using additional floor space.
Some high-form dampers close completely to save energy
2.3. Multiple opening dampers are extremely compact. They are especially suited for multiple flue arrangements. In specifying such dampers, conformance to ICBO Report No. 3139 should be required.
2.4. Smoke domes are suggested when less than 3 sides of the fireplace are enclosed. A smoke dome usually contains a
positive-action tension bar and chain pulls to adjust valve.
Fireplace dampers, circulator, and accessories
3. Metal Air Circulators
Metal heat circulators are designed to capture and circulate the warm air generated by the fireplace which is otherwise lost up the chimney.
Inlet grilles at the base of unit allow cool air to move from floor through heat chambers where air is warmed and returned to room through outlet grille located at top of unit. Circulating fans may be added to all units for better air movement.
Such units come complete, ready for installation and consist of: firebox, throat, and damper. The firebox is ribbed, has quick heating air flues through the throat to allow greater contact of air to hot metals, and because of large air inlet and outlet, warm air is moved faster.
All exposed metal parts are sealed against exposure by masonry downdraft shelf so nothing can rust. Damper controls on each side govern the amount of outside combustion air.
4. Accessories
For accessories, clean-out doors, ash dumps, outside air kits, chimney hoods, screens, and enclosures consult your local material dealer.
Fireplace glass doors
The NW Masonry Guide Table of Contents
Masonry Institute of Washington
Washington State Conference of Mason Contractors
