SUPER CHIMNEY:
- 2/3/10 rule.
- Must be braced to roof if taller than 5′, lags must be in rafters.
- Vertically supported every 6′ with stand offs.
- Look for pitting, rusting, loose or damaged.
- Must have chimney cap.
- Look for Tee with clean out.
- Super chimneys should be enclosed when passing through living space.
- Insulation needs to be kept away 2″ when in attic. Either with radiation shield or boxed in
- A dropped ceiling still needs combustible clearance. A cathedral ceiling support can be used.
- Basements should NOT have a super chimney for 2 reasons:
- In winter, basements are usually de-pressurized.
- It’s nearly impossible to clean out because Tee is at ground level.
- Ice deflector is recommended when super chimney is near eaves.
MASONRY CHIMNEY:
- 2/3/10 rule.
- Over 30″ wide requires cricket or saddle.
- Check masonry and chimney cap.
- Make sure flue tile is not cracked.
- Ember arrestor rain cap required.
- Needs lateral support every 12′.
- Masonry chimney MUST rest on foundation that is deeper than the frost line.
- If clay liner is severely damaged, recommend pulling new stainess steel liner.
- Flue must not be inclined more than 45 degrees.
- There should be a sealed bond-break between masonry cap and flue.
- Masonry chimneys must have a clean-out at base of chimney.
- Roof framing must be kept away 1/2″ for exterior chimneys and 2″ for interior chimneys.
- Joists can be fastened to masonry chimneys provided that masonry is minimum 11.5″ thick.
FLUE PIPE:
- Can’t exceed 10′ in length.
- 18″ clearance unless double-walled. Shield either on wall or on pipe (28 gauge minimum), 7/8″ away for 66% reduction.
- Offsets not to exceed 180 degrees.
- No galvanized steel allowed.
- Horizontal slope minimum 1/4″ per foot.
- Expansion joint/slip joint required for fully vertical installations.
- Minimum 3 screws per joint.
- Crimped/male end down unless double-walled pipe.
- Must NOT EVER pass through combustible framing without an insulated thimble.
- NOTE: Ceiling pass-through may provide less than 18″ clearance for flue pipe below, however this is acceptable.
STAINLESS STEEL LINER:
- Approved connectors are available if liner is not long enough.
- Insulation surrounding a liner in a masonry chimney MAY or MAY NOT be allowed, depending on mfg. recommendations.
- Liners surrounded by insulation develop draft faster, are more stable and don’t develop creosote build-up as fast.
- For hearth-mounted stoves, the opening (abandoned firebox) must be sealed to prevent drawing room air into chimney cavity.
WOOD STOVE:
- Certified vs. Un-certified.
- Un-certified clearances: 4′ on all sides(w/o shielding), 3′ if shielded, & 60″ to ceiling.
- See list for un-certified leg heights.
- Certified: follow certification data plate. Ceiling height: (82″) – (stove height) = Ceiling clearance.
- Check stove for damage, cracks, etc.
- Required: 4′ space at feeding door (front or side, depending on stove).
- 18″ front floor protection, 8″ sides and rear.
- Floor protection must be non-combustible, continuous material.
- Check firebrick inside.
WOOD STOVE INSERT:
- Continuous stainless steel liner.
- Try to check liner connection.
- Check box condition.
- Check firebrick inside.
FACTORY-BUILT FIREPLACE:
- Mandatory make-up combustion air vents required in Ontario.
MASONRY FIREPLACE:
- If fireplace floor is LESS than 6 sq. ft, 16″ hearth at front and 8″ at sides.
- If fireplace floor is MORE than 6 sq. ft, 20″ hearth at front and 12″ at sides.
- Additional 1″ extension needed for every 2″ in height over 6″.
- Must be on 4″ concrete slab, ensuring that wood form is removed from below.
- Must have flue damper.
MANTLE:
- If mantle is combustible and projects LESS than 1.5″, then 6″ clearance between top of firebox opening and mantle is required.
- If mantle is combustible and projects MORE than 1.5″, then 12″ clearance between top of firebox opening and mantle is required.
- If heat circulation vents are present HIGHER than top of firebox opening, mantle clearances will be measured from top of vents.
GENERAL NOTES:
- Wood stoves installed in modular homes must be certified for this particular use (combustible walls and floors).
- Appliances located in rooms with fuel vapours present (eg: garage) must be located 18″ above floor on non-combustible pad.
- Carbon monoxide detector is MANDATORY in rooms with wood burning appliances.
- Oil and wood burning appliances can share a flue, provided that:
- Oil appliance is approved for such use.
- Appliances are both on same floor.
- Oil appliance connects ABOVE wood appliance to flue.
- Metal shields must always be 28 gauge minimum material thickness.
- Flue pipe may be reduced, provided sufficient draft is still provided.