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Northern Comfort Heating & Cooling
Furnace Seasonal CheckupHealth Assessment Report
CustomerThe Whitfield Family
Service address42 Maple Crescent, Peterborough, ON
Date of serviceOctober 5, 2026
TechnicianAlex Morgan
EquipmentGas furnace - Lennox ML193UH045XE36B
Serial5618D04417
Installed2014-11
Filter size / Report #16x25x1 / FC-1
Checkup score95%Grade A
Operating normally
Your furnace is operating normally.
17 checked2 need attention
Furnace Health Assessment
Controls
Are the controls and wiring working properly?
Controls, safety limits and wiring checked
Airflow
Is your furnace moving air the way it should?
Review recommended: 1 item flagged. See details below.
Filtration
Is the air filter clean and the right size?
Review recommended: 1 item flagged. See details below.
Heat Exchanger
Is the heating section clean and sound?
Burners and heat exchanger cleaned and inspected
Venting
Is exhaust leaving your home safely?
Venting and chimney inspected
Air & Drainage
Is there fresh air and a clear drain?
Combustion air and condensate drain checked
Safety Testing
Is the air in your home safe?
Carbon monoxide and combustion tests completed
Good Review recommended Action needed Not checked
From your technician
Full cleaning and safety checkup completed. Burners, blower and flue were cleaned, and the combustion analyzer readings are in a healthy range. Filter replaced. The furnace is operating safely.
Alex Morgan, Northern Comfort Heating & Cooling
What we recommend
In order of priority. Nothing is done without your approval.
Keep an eye on it
Replace the furnace filter every 3 months (we left a spare).
Keep an eye on it$25
Consider a humidifier pad change before January.
The full checklist
1
Controls
Thermostat, safety limit controls and wiring
Check operation of thermostat
Checked
Check operation of safety limit controls
Checked
120 Volt System
Checked
24 Volt Control Side
Checked
2
Airflow
The parts that move warm air through your home
Remove and clean motor and blower assembly
Blower wheel had dust build-up; cleaned.
Needs attention
Check blower operation
Checked
Check condition, tension and alignment of fan belt
Checked
Lubricate pump, and motor bearings as required
Checked
3
Filtration
Keeping dust and debris out of your system
Clean air filters and instruct customer on filter maintenance
Filter was heavily loaded - replaced with a new MERV 8.
Needs attention
4
Heat Exchanger
Where your furnace makes and transfers heat
Clean burners and visually set for proper combustion and ignition
Checked
Inspect and clean heat exchange and flue passages
Checked
Check gas piping to furnace
Checked
Clean equipment exterior
Checked
5
Venting
Getting exhaust safely out of your home
Examine vent connector and inspect venting system
Checked
Visually inspect chimney and venting system
Checked
6
Air & Drainage
Fresh combustion air and condensate drainage
Combustion/Ventilation air adequate
Checked
Condensate and drain lines inspected
Checked
7
Safety Testing
Carbon monoxide and combustion analysis
Check ambient air for elevated CO levels
Ambient CO reading: 0 ppm
Checked
Combustion Analyzer Test Completed
Checked
Measurements
Readings taken by your technician during the visit.
Carbon monoxide in room air0 ppm
Typical safe level: under 9 ppm
Airflow resistance (external static pressure)0.46 in. w.c.
Typical range: 0.1 to 0.5 in. w.c.
Temperature rise60°FSupply minus return air
Supply air temperature128°F
Return air temperature68°F
External static pressure0.46in. w.c.
Gas inlet pressure7.0in. w.c.
Gas manifold pressure3.5in. w.c.
CO in flue gas14ppm
Flue gas temperature405°F
CO₂9.2%
O₂5.1%
Combustion efficiency93%
Your next checkupOctober 2027
Regular maintenance keeps your equipment efficient and safe.
About this service
Thorough cleaning of your furnace removes dust, debris, and buildup, improving heating efficiency, extending equipment life, and promoting cleaner indoor air. Regular maintenance helps prevent breakdowns and supports optimal system performance.
Why every year?
Your furnace works hardest in the coldest months. A yearly checkup catches small problems, like worn parts, dirty burners or venting issues, before they become a breakdown or a safety risk. It also keeps the furnace running efficiently, and keeping a record of each visit helps show the unit has been properly maintained. Think of it like a yearly physical for your heating system.
Your score is based on how many inspection items passed without needing attention. Comparing it year to year shows how your equipment is holding up.