A/C and Heating for 900sqft house in san diego


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Old 01-29-08, 10:59 AM
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Question A/C and Heating for 900sqft house in san diego

my wife and i own a 900sqft house in san diego about 4 miles from the ocean. we would like to install heating and A/C in the house. it has a vaulted ceiling so the ductwork will have to be installed underneath the house.

any suggestions on the size tons for that amount of sqft? gas or electric?

thanks.
qrpinc
 
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Old 01-30-08, 12:36 PM
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Wink

Try http://warmair.net to compare fuel cost for where you are . For what to go with. Any company that does the job should run a heat loss and AC load on the home. You cant say what a 900sq ft home will need. You might be better off as to cost with window heat pumps or a mini-split system .


For get 3 bids for the job.
 
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Old 01-30-08, 01:23 PM
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heat pump unit

Hi, you might want to look into a heat pump unit, with the price of fuel these days. Go all electric, a 1 ton, {package unit} should be enough for 900sq.ft. But you can check over the internet for sizing and is a {splite unit} might do you better. Goodman units have the longest warranty in the market and are said to be 2nd in line to best on the market. An the price is right. I bought a 2.5 ton for my place and it was around $1500. An there is a tax cut on heat pump units. Even in Calif. Later
Originally Posted by qrpinc
my wife and i own a 900sqft house in san diego about 4 miles from the ocean. we would like to install heating and A/C in the house. it has a vaulted ceiling so the ductwork will have to be installed underneath the house.

any suggestions on the size tons for that amount of sqft? gas or electric?

thanks.
qrpinc
 
  #4  
Old 01-30-08, 07:45 PM
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I have been working on A/C units for about 7 years in Arizona. I believe a 1.5 ton heat pump will be the right size for your place. A package should do the job just fine. Goodman's are a good unit and run well. They have a nice warranty that comes with them and are priced pretty well.
 
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Old 01-30-08, 09:35 PM
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If the home has a pretty open floor plan I'd check into the Mini Split system.

otherwise, an air handler in the crawl space. Package Units are Ok, they don't last as long as split system would.
 
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Old 02-01-08, 12:45 PM
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Go Green with AC

Just my opinion and you get to decide what thats worth. You own this house and you may or may not want to sell it in the future you need to get a reputable pro to do a load calc for you and you need to think efficiency.
In the next few years the first question prospective buyers will be asking (especially in California) is how green is your home and dollar for dollar there is no more effective way to impact your carbon footprint than making right decisions on your HVAC system.
 
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Old 02-05-08, 02:32 PM
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I have to agree with Mike. Have Calcs done on your home for proper equipment sizing. Too many homes have oversized equipment because "rule of thumb" was used. When you contact a HVAC company, make sure that this is something the estimator will do for you. It can be time consuming for the estimator (unless they are really experienced) but it will give you good piece of mind.

Also, make sure theyuse manual D for desigining your ducting system. What good is new equipment when the ducting is not properly implemented.

Hope this helps!
 
 

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