There once was a pretty successful homeowner that wanted to update his furnace and install an air-conditioner, but couldn't quite afford the most efficient systems. So, to save a few hundred dollars, he talked a friend of his from a local HVAC distributor to install a system under the moon light. The equipment was of a high quality, not the old "builder grade" everyone refers to. The old system was always running during the winter months, burning through gas and was never comfortable in the home. So, Joe we will call him, installed the largest residential furnace in stock. No way this thing will run constantly, the homeowner will definitely be able to hear it cycle on and off! Oh, and since there is already ductwork we'll add a/c to the system, all he needed to know was how many square feet the home was!
|Genius! An adjustable limit switch, bi-metal disc type!|
|What is left of the R-22 Evaporator|
Unfortunately, the above story is true in most regards - maybe a couple of blemishes on how the "technician" reached his "genius" moment. There is a moral to be learned here, properly size your equipment for the home! Don't think you are doing anyone "a solid" by installing the next size up. If you are not familiar with local building codes, lets just say it is your license and your livelihood on the line, never mind the homeowner's too! Find out Manual S sizing limitations here.
Special thanks to Aaron Lawrence, Lawrence Air Systems, Barrington, RI for sharing this unfortunate story and pictures. I hope I did some justice by getting most of the facts correct. Aaron was able to work wonders for this homeowner that now has a properly sized, efficient system providing the most comfort to the family - what they thought they were getting the first time!
If you have a story you would like to share, but can't find the words, please send me some details and pictures (if you have them). If we can avoid just one more situation like this than we have done our industry some justice!