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Sizing Help

Are you unsure which unit you need for your home? When looking to purchase new systems, be careful not to go too big or too small. If a unit is too big, it will make the house cold and clammy, in addition to starting and stopping frequently, causing the system to malfunction faster. A unit that is too small will always run, and the home will never reach the desired temperature.

So what size should I get?

There are a few different ways to size your area; follow the methods below for guidance.

First Method

Our Sizing Calculator

This online tool provides a rough estimate based on general factors. Although it may seem at first like the perfect fit for your home, please keep in mind it can't detect the different factors that make your home unique.

Second Method

Compare with your neighbors

Look outside, and you will notice that most of your neighbors have a similar home and might have already gone through this process. Speak to them regarding concerns that you may have that they may already have the answer to. Sometimes the best advice is right next door!

Third Method

Check the equipment that you have

You will soon find through your research that air conditioning and heating have not changed much over time. The heating still performs heating, and cooling still performs cooling; it's all in how much energy it takes to do so. Technology today has broken the barrier on cost-to-productivity ratios. New industry standards have raised the bar on us as the world is getting greener for our planet. Why not start at the simplest place, your home? Sometimes the answer to the most complex questions is right in front of us. Check the information on the equipment currently in your home. Look at the stickers normally located on the exterior of your current units for model numbers or BTUs, which will aid our Sales Center in finding a possible replacement for you.

Quick BTU Reference Chart (Outdoor Units)

• 9,000 BTU = 3/4 Ton
• 12,000 BTU = 1 Ton
• 18,000 BTU = 1.5 Ton
• 24,000 BTU = 2.0 Ton
• 30,000 BTU = 2.5 Ton
• 36,000 BTU = 3.0 Ton
• 42,000 BTU = 3.5 Ton
• 48,000 BTU = 4.0 Ton
• 60,000 BTU = 5.0 Ton

For example, an outdoor unit DSX18036 is a 3-ton unit.

Quick BTU Reference Chart (Gas Furnaces Units)

• 45,000 BTU = Heat Input
• 70,000 BTU = Heat Input
• 90,000 BTU = Heat Input
• 115,000 BTU = Heat Input

For example, a gas furnace model GMVC950905DX is a 90K Heat Input.

Fourth Method

Use the same software used by the Pro's: Manual J Load Calculation

This is software that is standard use for many HVAC professionals across the United States. It utilizes scientific methods for calculating your home's requirements and provides the heating and cooling needed for the area. It takes the specifics of your home, such as the square footage of the rooms, ceiling height, type of insulation used, etc., to make the calculation based on those factors. Many homeowners use this as a detailed guide for sizing so they can research the different system options and keep control of their home comfort needs.

Want to find out more about the software? Click here!

Fifth Method

Speak with the Installers. They can do it!

Speaking with an installer is the best way to find out the requirements for your home. Their trained eye and experience can offer peace of mind when sizing a new system. They can interpret the current system, assess new factors, and advise accordingly on your home/business needs. Most air conditioning and heating installers will provide free in-home estimates, so they can provide the information you seek.