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jakeb

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  1. jakeb
    according to that website the furnace was manufactured the 30th week of 1914.[:-dopey]
  2. jakeb
    didn't really mean to say it would save 36% on how much gas i would use. but the 36% smaller furnace would cycle less, matching the needs of my house better. i would think that would help as well as the 80% vs 95% thing. don't you have to figure your home's heat loss by the size and type of insulation you have? as well as many other factors. have you ever used hvac-calc? is it accurate? http://www.hvaccomputer.com/ my ductwork seems tight with very few air leaks, but it looks kind of like an octopus. the program shows if i insulate my ductwork i would lose 5k btu less heat. i don't plan on re-doing my ducts, but possibly insulating them.
  3. jakeb
    thanks for the advice. 1965 would make sense, the guy who owned the home before me bought it in 1964 and did a lot of renovations right away. i've got a CO alarm at the top of the basement stairs, is that sufficient? or should i put another closer to the furnace? the reason i want to replace it is for efficiency. it's an 80% with 150k btu input 120k output. a program i used (HVAC-Calc Residential) to calculate what size i needed shows ~ 80-90k btu. so with a 95% @ 90k btu output i'd be cutting out ~ 55k btu on the input side. that should save me 36% on gas. if i insulate my attic, basement, and ductwork the program says i could go with 70k btu. that would save ~ 50%.
  4. jakeb
    lol, it's my furnace. the rust on the bottom is from when the A-coil drip pan was clogged and leaked inside the bottom of the furnace. lived in this house for 3 years, only problem i've ever had was the blower motor went out a couple of weeks ago. i know it needs replaced, hoping to get another 2-3 years though. where do you come up with 1968 from the serial #?
  5. jakeb
    Click to Enlarge 38.22 KB Click to Enlarge 36.43 KB Click to Enlarge 46.95 KB Click to Enlarge 31.14 KB
  6. jakeb
    can anyone confirm the age? another thread where there was a decoder indicated there are three different ways to decode a sears furnace: Sears 3 types 1) A letter followed by two #’s in S# are year ex: R883512345 = 1988 2) (1980-1989) The first digit (a letter) is decade followed by a number ex: H6113930 = 1986 3) If S# is all #’s, 3rd and 4th are year ex: 22880018 = 1988 makes more sense using the second method. i get 1985. this looks much closer to what i thought it was by looking at the furnace. (sorry for reviving this old thread)
  7. jakeb
    how about this one: Sears Fifteen Model No: 867.761950 Serial No: H 50111408 Mfr No: 97383 info i gathered earlier in this thread would lead me to believe this is a 1950 [:-bigeyes
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