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Old 10-26-2011, 06:42 PM   #16
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Hard to change out the runs to the second floor.
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Old 10-26-2011, 07:07 PM   #17
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great conversations guys WHY NOT GET HIGH EFF FURNACE DESIGNED FOR MOBIL HOME????????????? maybe i need to read better before commenting thougth he owned a mobil home>>>>>my bad

Last edited by ben's plumbing; 10-26-2011 at 07:10 PM.
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Old 10-26-2011, 07:33 PM   #18
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Mobil home furnaces are down flow furnaces.
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Old 10-26-2011, 09:04 PM   #19
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Thank you all for your responses and suggestions and helping me through this challenging ordeal. Just a few minutes ago a neighbor a 1/4 mile away offered to help me. He is a Commercial HVAC specialist, apparently my 13 year old son told his friends about our ordeal. one of them told their mother who told her husband, that she recalled that my 15 year old daughter helped her mother when she fell crossing the road. Apparently her 80 year old mother broke her hip and my daughter signaled on coming traffic to stop and stayed around until assistance came. My daughter never mentioned this to us. Well to make a long story short he is going to price for me a Payne 95 % Furnace manufactured by Carrier same quality at his company price for less than $850. He said mobile home furnace is out of the question for reasons already stated here. He will also offer instructional guidance since he is working overtime this time of the year and due to my urgency can't promise he will have the time to help me through the entire process since he cover out of State calls.

I am sure that I will continue to ask for this forum's assistance and all suggestions are always welcomed. I am not out of the water yet and snow is in the forecast up coming days.
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Old 10-26-2011, 09:14 PM   #20
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I will soon post pics of my furnace and hvac setup
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Old 10-27-2011, 04:47 AM   #21
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Looks like a decent deal on a good furnace but I see you are replacing a mid-efficiency unit with a high efficiency one. So you will not be able to use the existing exhaust. The 95% unit needs a whole different setup and has many requirements as to routing and placement of the vent and combustion air intake although you may be able to have the combustion air intake inside at the unit (see the install manual for that). But figuring out where to run the exhaust and then installing that can be the most difficult part of the job, esp for DIY. Would have been easier to drop in another mid-efficiency unit if you are freezing and want it up and running sooner.
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Old 10-27-2011, 07:40 AM   #22
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Quote:
Originally Posted by raylo32 View Post
Looks like a decent deal on a good furnace but I see you are replacing a mid-efficiency unit with a high efficiency one. So you will not be able to use the existing exhaust. The 95% unit needs a whole different setup and has many requirements as to routing and placement of the vent and combustion air intake although you may be able to have the combustion air intake inside at the unit (see the install manual for that). But figuring out where to run the exhaust and then installing that can be the most difficult part of the job, esp for DIY. Would have been easier to drop in another mid-efficiency unit if you are freezing and want it up and running sooner.

I totally agree, for DIY the golden rule is ALWAYS replace with something as similar to the old furnace as possible, saves a lot of headaches. That advice would immediately stopped you looking at a mobile furnace.

Also a 95% furnace requires larger ducts then an 80%, they like to move air at lower temperatures but at higher rates. So you have to do the ducts over, otherwise it will cut out, heat exchanger will fail prematurely blah blah blah blah...


here is an old coleman with 3.5 inches ducts, wonder if that is what he has
http://books.google.com/books?id=3FY...page&q&f=false

Last edited by bungalow_steve; 10-27-2011 at 07:44 AM.
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Old 10-27-2011, 08:12 AM   #23
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Originally Posted by hvac5646 View Post
I would make the plenum larger then the furnace opening by two inches on both sides of the plenum frontal dimension).
why is that, airflow is not stable near the sides? Or installation issues for the take off?
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Old 10-27-2011, 09:35 PM   #24
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Once again thank you all, I think i will go with a compatible 80% mid range. Its now getting cold.
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Old 10-27-2011, 10:38 PM   #25
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Quote:
Originally Posted by bungalow_steve View Post
why is that, airflow is not stable near the sides? Or installation issues for the take off?
It's old school. The runs come off a relativity sort run. It's was very commom set up for small homes,
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