Load calculations are the way to dial in the capacity of your heating and cooling systems so that they work at peak efficiency while delivering comfort. They are also required by California’s 2013 Energy Code, Title 24, Part 6.
While software like Right-J from Wrightsoft cost $499, there is a new free option to do load calcs, Cool Calc. The software is web based and uses google maps and other on-line data to capture information about the house. The software won the Gold Award in the 2015 Dealer Design Awards.
Many contractors still use crude and inaccurate rules of thumb to size their systems while putting themselves into potential legal liability. One of our clients was threatened with legal action after he used an old rule of thumb for sizing. The system he designed and installed did not perform to manufacturer specifications. The building owner had some testing done and threatened a lawsuit unless the system was done to specs. That contractor now uses Wrightsoft software and creates state-of-the-art installations.
Opting for free and proven software can be a smart way to go. It is infinitely better than guessing like so many do. The Air Conditioner Contractors of America have been around for over 40 years. You can trust them when it comes to the methodology of sizing air conditioning systems. Now, with the 2013 California Energy code enforced around the state, this is a good time to switch from guessing to calculating air conditioner system sizing. Check out Cool Calc at Next Generation HVAC Sizing and Selection tools | Cool Calc
George Matthews
Building Energy Compliance Testing
San Francisco to Silicon Valley
www.bect.us
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