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How to Know if Your Air Con Unit is the Right Size for Your Home or Business

For anyone living and working in Perth, air conditioning is a wonderful invention of the modern world. True, a roof over your head and food to eat are the real essentials, but it’s a definite problem if you lack a functioning air conditioning system during the summer months.

Perhaps you already have an air conditioner in place, but are you getting the most out of your current system? Most property owners assume that as long as they hear their system turning on and feel it blowing cool air, all is well. Unfortunately, countless systems are functioning far below optimal capacity.

How does this happen? The size of your air conditioner matters, especially as it relates to the size of your home or business. To understand what unit size your building requires, you may need to consult a professional. Until then, here are some basic factors that should determine the size of your unit.

  1. Building Size

Building size can be calculated based on the number of square metres that make up the floor space. For most accurate measurement of how much air conditioning capacity you require, find out how many square metres make up your home’s floor plan, including multiple levels.

Once you’ve calculated your home or building’s total square metreage, you can then proceed to choose a corresponding size and level of efficiency for your system.

If you just want a basic idea to start with, the industry recommends 18kw per hundred square metres for an office but 15kw per hundred square metres for a home.

  1. Window Condition

Your windows are directly connected to unconditioned air. Although it may not be obvious to some, the condition of your windows weighs heavily on the type and size of unit you need.

Something to consider when it comes to your windows:

  • Number of windows in the building
  • Orientation to the sun
  • Window area

As you consider these window traits, create a list of all the things that may cause you to require a larger air conditioning unit. For instance, a high number of windows that face the sun will yield a higher kilowatt requirement for your system.

  1. Amount of Sunshine and Shade

The amount of sun that hits your building’s exterior makes a difference, too. Before deciding on a system size, make sure you are aware of how much sunshine and shade your exterior walls receive.

As you make your assessment, remember to factor in the shade from nearby trees and neighbouring houses and buildings.

  1. Existing Ventilation and Insulation

Ask your local HVAC provider to take a look at your existing system and ductwork. If there are problems or easy places for air to seep, this knowledge will help you make an informed decision about the system you need.

The degree of existing insulation also contributes to the success of your air con system. As you gather information, you’ll know if your current system is oversized or too small to meet the current requirements.

Keep in mind that an oversized system constantly shuts off and turns on, while an undersized one runs continuously. Both scenarios waste energy and cost you more than necessary, so consult with an HVAC professional today.