Recommendations on a new gas furnace

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Old 12-05-12, 09:08 AM
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Recommendations on a new gas furnace

I am planning on replacing our gas furnace, a Holly rated at 80,000 BTU, which appears to be an original to the house (1958). It still works, but obviously we are wasting a lot of money running it.
Our house is a small single level, raised foundation, 3 bedroom, 1200 sq. ft. house with moderate insulation and new double-paned windows located in Southern California. I am looking for recommendations for a forced air furnace that would be right for the size of the house, and one that is very efficient.

Any ideas?

Thanks!
OldFrenchy
 

Last edited by OldFrenchy; 12-05-12 at 10:37 AM.
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Old 12-06-12, 03:23 AM
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call local contractors.

There is no BEST brand. It's all about the installation. If a good furnace is not installed properly then it will not function properly or last as long as it should. Part of a good installation is proper sizing. Part of a good installation is checking for proper duct work.
 
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Old 12-08-12, 04:50 AM
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Before you purchase a furnace from someone, call them on Friday night at 7 PM and see what kind of response you get from them. Service after the sale counts too.
 
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Old 12-08-12, 01:20 PM
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Carrier, Trane, and Lennox are some good choices.
The quality of the installation is more important than brand.
As long as it isn't a furnace with the Honeywell Smart valve is should be fine.
 
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Old 12-08-12, 01:23 PM
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with the Honeywell Smart valve is should be fine.
LOL... I dont think they made the smart valve in 10 + years....

Goodman is reasonable...Its all in the install thought as the others have mentioned.


 
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Old 12-08-12, 01:56 PM
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That's good news since I'm not sure what 1/2 wave rectified AC is measured with.
 
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Old 12-08-12, 05:34 PM
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Before replacing the furnace, improve the house envelope. Improving the windows, doors, & especially insulation will pay you back many times over & likely allow for a smaller furnace.
After the envelope improvements, do, or have done, a Manual J heat loss calculation & size the furnace accordingly.
 
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Old 12-09-12, 08:35 AM
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Most replacement jobs I go on I wind up bidding higher to try to correct the inadequate ducting. I would get a lot more jobs and make a lot more money if I just threw them in there and walked away....that seems to be the trend. My brother in Seattle just went through this same type of deal, what a mess when it was done

The new furnace is not very efficient if the air doesn't flow properly, and that's the true fact of the matter.
 
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Old 12-11-12, 03:17 PM
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Try using an oscilloscope
 
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Old 12-11-12, 05:51 PM
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Use an oscilloscope for what? How does this relate to furnace brands or installations?
 
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Old 12-17-12, 11:16 PM
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Where is the furnace/ductwork located?

What does fair insulation mean?

The proper way to size a furnace is to do a load calculation.

Changes are that your current unit is too large.
 
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