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AIR CONDITIONING & HEAT PUMP SYSTEMS
BACKDRAFTING HEATING EQUIPMENT
BACKUP HEAT for HEAT PUMPS
BANGING HEATING PIPES RADIATORS
BLOWER FAN OPERATION & TESTING
BOOKSTORE - InspectAPedia
BTU USAGE MONITORS
CARBON MONOXIDE - CO
CIRCULATOR PUMPS & RELAYS
DIAGNOSTIC GUIDES A/C / HEAT PUMP
DIAGNOSE & FIX HEATING PROBLEMS-BOILER
DIAGNOSE & FIX HEATING PROBLEMS-FURNACE
DIRECT VENTS / SIDE WALL VENTS
DRAFT REGULATORS, DAMPERS, BOOSTERS
DUCT SYSTEM & DUCT DEFECTS
ELECTRIC HEAT, DIAGNOSIS, REPAIR
ELECTRIC MOTOR DIAGNOSTIC GUIDE
FAN, AIR HANDLER BLOWER UNIT
FLOODED HEATING EQUIPMENT REPAIR
FLUE SIZE SPECIFICATIONS
GAS BURNER Flame & Noise Defects
GAS PIPING, VALVES, CONTROLS
GEOTHERMAL HEATING SYSTEMS
HEAT PUMPS, DIAGNOSIS, REPAIR
HEATING COST SAVINGS METHODS
HEATING OIL PIPING TROUBLES
HEATING OIL TANKS
HEATING SYSTEM NOISES
HEATING SYSTEM TYPES
LP & Natural Gas Safety Hazards
MANUALS & PARTS GUIDES - HVAC
MIXING / ANTI-SCALD VALVES
MOTOR OVERLOAD RESET SWITCH
NOISE, HEATING SYSTEMS
ODORS FROM HEATING SYSTEMS
OIL FILTERS on HEATING EQUIPMENT
OIL FILL PIPE LEAKS
OIL SPILL CLEANUP / PREVENTION
PLASTIC HEATER VENT
PUFFBACKS, OIL BURNER
RELIEF VALVE LEAKS
Reset Switch - Heater Primary Control
RESET SWITCH - ELECTRIC MOTOR
Reset Switch - Stack Relays
SAFETY, HEATING INSPECTION
SAFETY RECALLS CHIMNEYS VENTS HEATERS
SOLAR HEATING SYSTEM DESIGNS
SOOT on OIL FIRED HEATING EQUIPMENT
STEAM HEATING SYSTEMS
THERMOSTATS, HEATING / COOLING
VIDEO GUIDES: Heating System Videos
WINTERIZE A BUILDING
WOOD, COAL STOVES & FIREPLACES
WOOD STOVE SAFETY
This article explains the procedure for opening and inspecting heating flues through the barometric damper or draft regulator, with particular emphasis on problems of soot & debris accumulation. Inspecting inside the boiler flue by the draft regulator opening gives very important information about the operating condition of oil fired heating equipment. A comprehensive list of draft regulator defects are described in detail at Draft Regulator Inspection Points, Defects & Signs of trouble and elaborated further at Questions & Answers about inspecting and adjusting the barometric damper found in our our separate article DRAFT REGULATORS, DAMPERS, BOOSTERS
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In addition to this detailed damper inspection procedure, readers should be sure to review Barometric Damper Defect List. This article series answers most questions about central heating system troubleshooting, inspection, diagnosis, and repairs. We describe how to inspect, troubleshoot and repair heating and air conditioning systems to inform home owners, buyers, and home inspectors of common heating system defects.
Details about draft control on oil fired heating systems (such as the oil fired heater shown in the photo above), including furnaces or boilers, are discussed at DRAFT REGULATORS, DAMPERS, BOOSTERS on oil fired equipment. (Details about draft control for gas fired heating systems, including furnaces or boilers, are discussed at Furnace Draft Hood on gas fired equipment. Contact us to suggest text changes and additions and, if you wish, to receive online listing and credit for that contribution.
How & Why Should You Open & Inspect the Barometric Damper:
Guide to Interpreting Debris Visible in the Chimney Through the Cleanout or Draft Regulator
Question: What is the significance of those "rusty flakes" in the photo of crud visible at the chimney base or through the barometric damper
When I cleaned our flue exhaust, I found 'chips' in the soot like the ones in the image. What are those? I thought they might be from the flue lining chipping off. Are they? - Jessica
The "chips" such as those in our photo are typically soot-coated rust if the flue is metal, or soot-coated flakes of the glazing that was protecting the interior of a clay tile lined chimney flue.
The implications of the chips are that the hard glazed coating is being lost and thus the flue is deteriorating. Just how deteriorated the flue is we can't say from a photo like this one, but it is an indication that a more expert chimney inspection is in order. Use a professional chimney sweep and ask for a complete inspection of the chimney flue interior.
Loss of the chimney tile surface exposes the chimney flue liner to an ever increasing rate of deterioration, especially in climates of harsh or freezing weather. When the chimney liner deteriorates that means that eventually it can become unsafe, risking flue gas leaks, carbon monoxide poisoning, or even sparks and a building fire.
See CHIMNEY CLEANOUT DOORS for more examples of things you may find at the bottom of a chimney when inspecting through the cleanout door, or if it's a "dead end flue" you may find these inspecting through the flue vent connector or, if the flue is without bends and elbows, you may be able to inspect right through the barometric damper such as in our photo above.
When & Why is soot or crud in the oil fired boiler or furnace flue a problem?
Frequently Asked Questions (FAQs) about draft regulator & barometric damper inspection & troubleshooting
Questions & answers or comments about the importance of accumulated soot & debris in the heating flue vent connector viewed through the draft regulator opening or by other means. .
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Technical Reviewers & References
Related Topics, found near the top of this page suggest articles closely related to this one.