Q:

How do you calculate HVAC tonnage?

A:

Calculate tonnage of heating and cooling equipment needed based on square footage of homes, such as 1 ton for every 1,000 square feet. Find the overall tonnage by factoring several criteria such as number of windows, people in the house, thermal properties of appliances and overall heat gain of the dwelling.

  1. Use a rule of thumb

    Know the general rule of thumb for newer homes in the United States, which is 1 ton of equipment for every 1,000 square feet of living space. Realize that energy-efficient homes may only need 1 ton for every 2,000 square feet.

  2. Take into account different variables

    Calculate variables that add heat to a home. A human body averages 230 BTUs per hour. The total amount of appliances account for 1,600 BTUs in an hour, and lighting adds another 1,600 BTUH. Houses with more efficient appliances, fewer windows and better lighting do not have as much inside heat. Denote that heating and cooling zones mean different needs based on local climates. Square footage needs for HVAC equipment differs from warmer climates to cooler climates in the United States.

  3. Find tools to help

    Get assistance from computer programs that help by automating the process. Find programs that follow the "Manual J" method adopted by the Air Conditioning Contractors of America. When calculations are done correctly, the computer program determines a smaller air conditioner is needed than what is normally calculated using a rule of thumb.

Learn More

Related Questions

  • Q:

    What is electrical pressure called?

    A:

    The common term for electrical pressure is voltage. Voltage is defined as the amount of electrical pressure that results in 1 ampere given a resistance of 1 ohm, according to Bay Electric.

    Full Answer >
    Filed Under:
  • Q:

    How does a double-pole circuit breaker work?

    A:

    Double-pole circuit breakers, also known as two-pole breakers, feature a combination handle that makes it possible for both phases of the breaker to trip if a short is detected on either side. The tripping has the effect of cutting the flow of power into a home’s wiring. Thus, the gadgets are safeguards against entry of excess current into a circuit.

    Full Answer >
    Filed Under:
  • Q:

    How do you install a transfer switch?

    A:

    To install a transfer switch, install the transfer switch panel, and connect it to the circuit breaker with wires and a conduit. You need a manual transfer switch, flanged inlet box, 30-amp circuit breaker, wire nuts, a flexible 3/4-inch conduit and conduit connectors to complete this project.

    Full Answer >
    Filed Under:
  • Q:

    How do you replace batteries?

    A:

    Replace the batteries in any device by removing the old batteries and inserting replacements into the compartment. Always use batteries of the appropriate size and type.

    Full Answer >
    Filed Under:

Explore