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Posted by kool on December 15, 2007, 3:04 pm
>
>> On Sat, 15 Dec 2007 10:37:52 -0600, Noon-Air wrote:
>>
>>>>I just bought a house with installed oil furnace Lennox model o11 - 140.
>>>> Serial no. is hard to read but I think is 5873J00215. I'm looking for
>>>> any
>>>> info about that furnace like how old can be, output BTU (input is
>>>> 140,000
>>>> BTU/hr) and efficiency. I try to google for Lennox o11 but can't find
>>>> anything.
>>>
>>> Ask your favorite local tech when you call him to get the furnace
>>> serviced.
>>> I don't understand all I know about lummox serial numbers, but I would
>>> venture to guess that its long past its normal design service life.
>>
>> I spoke to guys and they are serviced that furnace for an old home owner,
>> but they didn't know anything about specs.
>
> Please re-read..... its probably long passed its design service
> life(usually 18 - 20 years)..... just a guess here, but your furnace if
> probably closer to 35 years old. Manufacturers usually don't support
> equipment that is more than 20 years old.
Plant# 58 (Marshalltown Iowa?)October 1973.(5873J) definitely a museum
piece.
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