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Old 08-02-2012, 10:07 PM   #16
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Life expectancy of residential central air


No heat with this unit? Hmm....that changes things a bit. Gas fired units have heat exchangers which MAY last 15 years. If it's cool only that doesn't come into play. The efficiency is what does come into play here, plus the fact that you probably have R22 which is being phased out, and costly when available.

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Old 08-02-2012, 10:12 PM   #17
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Life expectancy of residential central air


My air is 20 puls, never been serviced. Filter change every 6 months. Hose condensor off, keep the dog away. It is a closed system so why would it need service unless there is a leak.
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Old 08-02-2012, 10:24 PM   #18
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Life expectancy of residential central air


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Originally Posted by Hardway View Post
My air is 20 puls, never been serviced. Filter change every 6 months. Hose condensor off, keep the dog away. It is a closed system so why would it need service unless there is a leak.

Perhaps service is the wrong word. Maintenance describes it better. Keeping the coils clean, burners cleaned, etc.

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