54
Rev. 05/2020
Creosote
Creosote - Formation and Need for Removal -
When wood is burned slowly, it produces tar and other organic vapors, which combine with
expelled moisture to form creosote. The creosote vapors condense in the relatively cool
chimney flue of a slow burning fire. As a result, creosote residue accumulates on the flue
lining. When ignited this creosote makes an extremely hot fire.
The chimney connector and chimney should be inspected at least twice monthly during the
heating season to determine if a creosote buildup has occurred.
If creosote has accumulate it should be removed to reduce the risk of a chimney fire.
DO NOT connect to a chimney flue serving another appliance.
Flue
Principles of the Flue
The flue allows the passage of heat, smoke, and gases from the
firebox to the chimney. Because the flue is surrounded
with Heat Transfer Fluid (HTF), heat is transferred to the HTF
surrounding the flue. This captures heat that would otherwise be
lost out the chimney, assisting in the process of a more efficient
burn.
Maintenance
Only dust should accumulate in the flue.
If creosote develops,
the cause should be determined an eliminated.
1) Inspect and clean the flue once a month during the
heating season.
2) Remove the one-half inch nuts holding the flue cover and
remove the cover.
3) Using the flue scraper provided with the HEATMOR™
furnace, push the dust to the front of the flue and let it fall
down into the firebox. Remove this dust as you would
ashes. If a lot of dust is dropped down, be certain that the
air slot of the front air box is not covered.
4) Re-attach the flue cover plate, making sure to tighten the
nuts to make an airtight seal.
5) If the HEATMOR™ Furnace unit is shut down for the
summer, inspect and clean the flue for the next heating
season.
Flue Cover
Principles
The flue cover is airtight and provides access to the flue for cleanout.
Flue Scraper
Principles
The flue scraper is provided for cleaning the flue only and is not designed to be used for
other purposes.
Flue
Removing Flue Cover
Flue Scraper
