Ac Size Calculator

This AC Size Calculator helps users determine the appropriate air conditioning unit size for their room by calculating BTU requirements based on room dimensions, sun exposure, insulation quality, and occupancy.

Use Our Ac Size Calculator

Guide to Using the AC Size Calculator

This guide is designed to help you navigate and effectively utilize the AC Size Calculator for determining the appropriate air conditioning size for your specific room dimensions and conditions.

Step 1: Room Details

  1. Enter Room Area: Input the size of the room in square feet in the field labeled “Room Area (square feet)”. This field is mandatory, and the room size should be between 50 and 2000 square feet. Ensure that you enter a number within this range.
  2. Specify Ceiling Height: Add the ceiling height of your room in feet in the “Ceiling Height (feet)” field. This information is necessary to calculate room volume accurately, and it must be between 7 and 20 feet.

Step 2: Environmental Conditions

  1. Select Sun Exposure: Choose the level of sun exposure your room receives from the dropdown list labeled “Sun Exposure”. Options include:

    • Minimal (North facing/heavily shaded)
    • Moderate (East/West facing)
    • High (South facing/direct sunlight)

    This field is required for adjustments to the base capacity.

  2. Choose Insulation Quality: Select the quality of the room’s insulation from the list labeled “Insulation Quality”. The options are:

    • Poor (old windows, minimal insulation)
    • Average (standard insulation)
    • Excellent (energy efficient windows, good insulation)

    This choice affects the efficiency of the AC and is a required field.

Step 3: Occupancy Input

  1. Number of Occupants: Input the number of people that usually occupy the room in the field “Number of Occupants”. This field is necessary for calculating the heat load contributed by the occupants. Enter a whole number between 1 and 20.

Step 4: Review Calculations

  1. Room Volume Calculation: Based on the inputs, the calculator will compute the “Room Volume” by multiplying the room area by the ceiling height. The result is displayed in cubic feet.
  2. Base and Adjusted BTU Requirement: The calculator first determines the “Base BTU Requirement” by multiplying the room area by 20 BTU per square foot. The “Adjusted BTU Requirement” is then calculated by modifying this base value with factors for sun exposure, insulation, and occupants.
  3. Recommended AC Tonnage: To find out the appropriate AC size, the adjusted BTU is divided by 12,000 to convert it into tons. The “Recommended AC Size” is displayed in tons.