Manual J is required to obtain your HVAC permit in MA
If you are an HVAC contractor or home energy rater, you know what Manual J is and how important it is for properly sizing an HVAC system. These HVAC guidelines apply to any residential unit that has a HVAC and exhaust system:
Manual J outlines the requirements for conducting a “load calculation” on the home, such as measuring insulation and ventilation levels. Other considerations include air duct tightness and the number of heat-producing appliances and people.
Each room’s results specify how many British thermal units (BTUs) are lost in the winter and how many are gained in the summer.
After measuring each room’s sensible (temperature-related) and latent (humidity-related) heat, the technician can then determine how much conditioned air that room requires. It is necessary to conduct this inspection prior to sizing a system so that you end up with a properly sized HVAC system.
Any & all HVAC systems constructed must undergo the Manual J calculation by order of the Massachusetts building code.
Proficient with ACCA approved software; Wrightsoft Right-J8 our team is more than able to handle any calculation.
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24 School Street; West Dennis, MA 02670