Jotul F 500 operating instructions Chimney Requirements, Masonry Chimneys

CHIMNEY REQUIREMENTS

There are two types of chimneys suitable for the OSLO F500:

1.A code- approved masonry chimney with a flue liner.

2.A prefabricated chimney complying with the requirements for Type HT (2100°F) chimneys per UL 103 or ULC S629.

The chimney size should not be less than the cross- sectional area of the flue collar, and not more than three times greater than the cross-sectional area of the flue collar.

When selecting a chimney type and the location for the chimney in the house, keep this in mind: it is the chimney that makes the stove work, NOT the stove that makes the chimney work. This is because a chimney actually creates a suction, called “draft” which pulls air through the stove.

Several factors affect draft: chimney height, cross- sectional area (size), and temperature of the chimney, as well as the proximity of surrounding trees or buildings.

As a result, a short masonry chimney on the exterior of a house will give the poorest performance. This is because it can be very difficult to warm the chimney thereby creating inadequate draft. In extremely cold northern areas it may be necessary to reline the chimney or extend its height to help establish draft.

Oppositely, a tall masonry chimney inside the house is easier to keep warm and will perform the best.

The following guidelines give the necessary chimney requirements based on the national code (ANSI- NFPA 211for the US. And CSA CAN-B365 for Canada). However, many local codes differ from the national code to take into account climate, altitude, or other factors. It is important that you check with your local building officials to find out what codes apply in your area before installing your new OSLO F500.

Masonry Chimneys

When installing the OSLO F500 into a masonry chimney you must conform to all of the following guidelines:

·The masonry chimney must have a fireclay liner or equivalent, with a minimum thickness of 5/8” and must be installed with refractory mortar. There must be at least ½” air space between the flue liner and chimney wall.

·The fireclay flue liner must have a nominal size of 8” X 8”, and should not be larger than 8”X 12”. If a round fireclay liner is to be used it must have a minimum inside diameter of 6” and not larger than 8” in diameter. If a chimney with larger dimensions is to be used, it should be relined with an appropriate liner that is code approved.

·The masonry wall of the chimney, if brick or modular block, must be a minimum of 4” nominal thickness. A mountain or rubble stone wall must be at least 12” thick.

·A newly-built chimney must conform to local codes and in their absence must recognize national regulations.

·When using an existing chimney, it must be inspected by a professional licensed chimney sweep, fire official, or code officer, to ensure that the chimney is in proper working order.

·No other appliance can be vented into the same flue.

·An airtight clean-out door should be located at the base of the chimney.

Prefabricated Chimneys

If a prefabricated metal chimney is to be used it must be a chimney type that is tested and listed for use with solid fuel burning appliances. High Temperature (HT) Chimney Standard UL 103 for the U.S. and High Temperature Standard ULC S-629 for Canada.

5