10/31/2026
Five failed heat exchangers swapped out on Lennox rooftop units this week.
A cracked heat exchanger isn't something you can see from the parking lot or the thermostat. The unit keeps running and keeps heating, but combustion gases, including carbon monoxide, can leak into the air being supplied to the building. By the time someone notices, it's usually a red tag, a no-heat call, or worse.
These were caught during routine maintenance, before they became an emergency in the middle of a cold snap. That's the whole point of regular RTU service: inspections catch problems early and keep tenants comfortable and safe.
If your rooftop units haven't been looked at this season, now's the time, before heating season really kicks in.
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