Manual J Load Calculations
#1 Provider in the United States
HVAC Manual J Load Calculations FAQ:
Why do I need an HVAC Manual J Load Calculation Report?
Submission of an HVAC Manual J Load Calculation is a code requirement in many states, such as
How does Manual J factor into this service?
The Air Conditioning Contractors of America (ACCA) Manual J Residential Load Calculation Procedure is the accepted industry standard for the proper sizing and selection of HVAC equipment in residential applications. Manual J outlines the accurate procedure which can be used to estimate the heat loss and heat gain for conventional residential structures. Savoy Engineering Group Load Calculation Reports are based on ACCA’s Manual J 8th Edition, inclusive of all four addenda to the 8th edition.
Where does it all begin?
A quality installation begins with a professional design. A professional design begins with a quality load calculation. Savoy Engineering Group will provide a report based on computerized analysis which indicates the heating and cooling capacities an installed system will need. This analysis is based on the specific thermal characteristics of your home with internal loads and appliances taken into consideration.
What else do I get from the Manual J Load Calculations?
Heating and cooling equipment comes in many different matched capacities, configurations, and efficiencies. It is important that you select the right equipment that is compatible with the home’s heating and cooling needs. A Savoy Engineering Group professional and accurate load calculations provides positive inputs to installed heating and cooling systems.
How do I know your software is accurate?
ACCA-Certified Manual J load calculation starts with Right-J®. WrightSoft and ACCA have been partners since 1986. As the original ACCA Technical Partner, WrightSoft’s 20 year relationship is longer than all other software partners combined. Right-J is currently in use by tens of thousands of contractors and HVAC designers, providing them with the industry leading load calculation tools. WrightSoft Universal Right-J calculates ACCA certified Manual J 7th and 8th edition load calculations, including addenda A, B, C, and D. All manual J tables are included, including:
· Single-family detached homes
· Small multi-unit structures, condominiums, and townhouses
· Manufactured homes with improved sizing loads
· Log homes
What if my project is a GREEN project?
The certified calculations that WrightSoft Universal generates are the industry standard for demonstrating and gaining code approval fro proper sizing and design. A large number of state inspectors use WrightSoft exclusively for code enforcement. WrightSoft’s residential software load calculations are based on Manual J calculations, which is the standard for virtually every state.
What if my project requires EPA, HERS, LEED Certified, Energy Star and/or Energy Smart?
Each of these programs has different requirements and cannot be grouped together. In almost all cases they are referring to the energy calculations and rating the entire building including construction materials, heating and cooling equipment among other factors. In short, the residential heating and cooling load calculations generated by Savoy Engineering Group are required to submit and gain approval for most of these programs depending on the specific requirements. WrightSoft Universal links directly to ResCheck and Rem/Rate which is the leading HERS rating product on the market. The certified calculations Savoy Engineering Group supplies are a required step to gain any of these certifications.
Doesn’t EPA require you to be HERS certified for green projects?
EPA guidelines stipulate the “what” not the “who” on right-sizing calculations. HERS raters just check that the calculations have been performed by a certified software program and that the EPA specified set points and air-tightness has been used, and not who did the calculations. However, the lead engineer at Savoy Engineering Group has a master level engineering degree and has a thorough understanding of residential HVAC load calculation theory.
