Contractors and builders are walking into permit offices and being told they have to size their heating and cooling equipment and their duct work according to something called ACCA Manual J and Manual D. Okay, what the heck is that and how do you get them done, never mind done accurately???
ACCA approved Wrightsoft programs include Right-J for residential heat gain and heat loss calculations, Right-D for residential duct sizing and Right-N for light commercial loads. WrightSoft also bundles their various design modules into Right-Suite. Bill Wright and his team are continuously adding new easy-to-use features.
In 1985 at the Massachusetts Institute of Technology (MIT), Bill Wright was giving a graduate seminar on heating, ventilation, and air conditioning (HVAC) when he was approached by the Air Conditioning Contractors of America (ACCA). The largest organization of HVAC contractors in the United States, the ACCA wanted to work with Wright to develop a … Continue Reading »
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When you are having a central air system installed into your home, it can be a lot more complicated than simply finding room in the walls and attic of your house for all the necessary equipment. Part of the challenge is also making sure that the system you’ve chosen can do an adequate job of … Continue Reading »
ACCA (the Air Conditioning Contractors of America) publish Manual J and Manual D worksheets and contractors used these forms to calculate residential heat loss and heat gain because they were the accepted method for calculating residential loads for decades.
When it comes to choosing adequate equipment to provide central heating and air conditioning to a home, it’s of utmost importance to have pinpoint accuracy when calculating the necessary load. If the calculations are too conservative, the homeowner may be stuck with a system that can’t handle the needs of the home. If the calculations … Continue Reading »
When it comes to the HVAC design process and Manual J load calculations, you can’t go wrong by simply following in the footsteps of those who came before you. The Manual J load calculations are clear, tested, and true, and there is a reason they have truly become the industry standard. Builders and contractors who … Continue Reading »
The Air Conditioning Contractors of America (ACCA) is the largest organization of heating, ventilation, and air conditioning (HVAC) contractors in the United States. As such, it’s committed to always highlighting the latest trends in the industry, and for providing HVAC contractors with access to cutting-edge resources that allow them to be the best at their … Continue Reading »
Oversizing any HVAC system will result in increased energy use, reduced comfort, indoor air quality, building, and HVAC equipment durability. The oversized comfort system will “short cycling” in both the heating and cooling modes. In order to reach peak operational efficiency and effectiveness, the HVAC system needs to run for as long as possible to … Continue Reading »