#DUCT SIZING ONLINE CALCULATOR MANUAL#
#DUCT SIZING ONLINE CALCULATOR CODE#

While energy codes vary from state to state, in general there are 2 different paths that can be followed to determine if a construction project meets your stateвЂ™s energy codes.

#DUCT SIZING ONLINE CALCULATOR MANUAL#

In addition, most state energy codes require that an ACCA Manual J heat load calculation be performed on the construction project, and that the heating and cooling equipment must be sized per ACCA Manual S. Most states require that the overall energy efficiency of a residential construction project must be calculated and reported in order to qualify for the appropriate construction permits.

#DUCT SIZING ONLINE CALCULATOR CODE#

*According to the International Code Council (ICC), вЂњHeating and cooling equipment shall be sized based on building loads calculated in accordance with ACCA Manual JвЂќ. This information is critical when determining the individual duct sizes as well as the size and overall layout of the duct system. In addition to the information produced by a block load calculation, the Room-by-Room method also determines the amount of air that is required to heat and cool each individual room. Room-by-Room Load Calculations provide the heating and cooling loads for each individual room within the home. Whole house load calculations are commonly used to determine the correct HVAC equipment size and match-up that is required when replacing the HVAC system in an existing home. This type of load calculation is used when there is no need to design or modify an existing duct system.

Whole House or Block HVAC Load Calculations provide the heating and cooling loads for the entire home. Whole House (Block) HVAC Load Calculations.There are two types of Manual J load calculations: ACCAвЂ™s Manual J even calculates the amount of heat and humidity that each occupant of the house will add to the interior of the home. In addition, an HVAC load calculation also takes into consideration other factors such as the homeвЂ™s geographic location, orientation to the sun, envelope tightness, duct leakage, lights and appliances.

Through a complex series of calculations and inputs, the HVAC designer is able to analyze all aspects of the thermal characteristics of every wall, floor, ceiling, door and window. By following the Manual J methodology, HVAC designers are able to accurately determine the total amount of heat that is lost through the exterior of a home during the cooler months, and the total amount of heat that is gained through the exterior of a home during the warmer months. ACCAвЂ™s Manual J is the first step in the design process of a new heating and air conditioning system.

Duct sizing online calculator