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Posted by udarrell on November 29, 2006, 10:29 am
daytona° wrote:
>Just went through this with my brother-in-law from Pasadena and I am in
>Western PA....ONE hell of a price difference from East to West. But for as
>mush as the A/C runs, I personally would be looking into a higher SEER A/C
>system. And I finally realized, it does not get really cold there....so the
>heating furnace can be an 80% unit
>SEER ratings can go as high a 18 now...some maybe higher. But they cost
>more, but the savings in rewarding in the end
>
>
>
>>Got a quote from a contractor to replace my central air and heating.
>>Wondering what you guys think. I am in the Southern California/Los
>>Angeles Area, single story, 2000 sf home. They are proposing to use
>>Amana 14 SEER Prestige RCE60C2C and AMS81155CNA 80% Gas Furnace. Are
>>these good units?
>>
>>The quote was $9500. Work includes:
>>- removal of existing furnace in closet and package unit on roof
>>- remove and replace all existing ductwork (half of attic is very
>>shallow with limited access, about 2-3 feet tall, the other half is
>>about 6 feet)
>>- install new furnace in attic
>>Is this a reasonable price?
>>I know nothing about HVAC, but reading through the specs for the
>>RCE60C2C, there seems to be no performance rating (SEER) for the
>>combination of the RCE60C2C and the AMS81155CNA. Will this still
>>provide 14 SEER
>>
The Los Angeles, CA area Summer Design is 89F-dry bulb, 70F-wet bulb,
39% RH rather dry, therefore a light latent load.
How much run-time do you have in the LA area; 600 to 700 hours a year?
Low run-time, Low savings to initial SEER costs!
A 13 or 14-SEER system ought to be a good choice depending on electric
rates.
Do everything you can to reduce the heat-gain heat-loss, then do a
Manual J for the load & D for the ductwork!
Do NOT oversize the system! - udarrell
--
PROPER A/C UNIT & DUCTWORK Sizing is over 70% of Operating Efficiency
http://www.udarrell.com/proper_cfm_btuh_duct_sizing_air_conditioning_systems.html
Air Conditioning Installations Now Produce 95% Failure Rate
http://www.eeba.org/conference/2004/presentations/Proctor1.pdf
Solving - External Static Pressure (ESP)
http://www.udarrell.com/udarrell-air-conditioning.html
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