Lennox Furnaces

With the promise of another cold winter right around the corner it is a great time to make sure that our furnaces are ready to battle the cold. Did you know that those old Lennox Furnaces from 20-40 years ago had a serious problem?

They are brown or grey in colour and the model number is located inside the easily removable front panels. Look for numbers starting with G8,G9,G10,G11 and G12. Thousands are still in being used in our area.

The issue with these furnaces is the heat exchanger. They have a tendency to crack inside at the hard to see metal curves. It is not if they will crack but when. The result is possible carbon monoxide passing through the heat exchanger to the air that is circulated into the home!

What should you do if you have one?

(1)If you or your clients have one of these furnaces then you are well advised to have it serviced regularly. 

(2) Consider purchasing and installing a lower mounted carbon monoxide detector near the bedrooms as CO is heavier than air. 

(3) Although they may last a long time, furnaces have approximately a 20 year life span so budget for replacement in the furnace. 

(4) Please call Gary if you need help to identify a problem furnace or to check for carbon monoxide at the heat register.




Gary Ladwig Certified Master Home Inspector 778 888 4893

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