Bigger is better. You’ve heard the term before, and you’ve probably applied it to multiple areas of your life. But does the saying hold true for your air conditioning system as well? Unless your home currently has an undersized AC that is struggling to meet the tonnage needed, you’re probably better off finding out exactly what size AC you need, rather than simply upgrading to the next largest size.
Many years ago when central AC became more prevalent, most of the houses that it was installed in weren’t very energy efficient. They were drafty, often had poor insulation, and single pane windows. As a result, a larger air conditioner was needed to keep up and ensure the house stayed cool.
Times have changed, however, and houses continue to become much more energy efficient. People are sealing up air gaps, putting in energy efficient windows, and adding insulation to their homes. They’re also repairing old and faulty ductwork that could be losing energy as the air travels along it.
Because of this, air conditioners no longer need to be so large. (Installing an AC unit too large for a space is known as “overtonning”.)
While you may think that this isn’t a problem, it actually creates a situation where the air conditioner is only working at roughly 60% of its capacity, but using more energy and wearing out faster than an air conditioner that is correctly sized to the house. If your air conditioner is too large, you’re going to pay more for energy usage each month, more money in maintenance bills, and the AC is probably going to wear out faster and require replacement earlier than a smaller unit.
You shouldn’t go out and purchase a new unit that matches the size of the old one, and you certainly don’t want to upgrade to the next largest size if you don’t feel the old one is working well enough. How do you find the right size?
By having your heat load calculated by a trained professional.
NATE certified professionals can measure your home, including the heights of your ceilings, and take into consideration things like how much sun your home gets, and how energy efficient it is. They can then give you the exact amount of tonnage your home requires to keep it cool – not too much or too little.
The end result is a home that stays comfortable, and doesn’t elevate your energy bills each month.
If you think that you need to increase the size of your unit because it isn’t keeping your home cool enough, there are a few other things that you may want to consider first.
Poor air gap is responsible for the loss of as much as 30% of your home’s inside air. That means that 30% of the air that your air conditioner is cooling could be lost to the outdoors. If this is the case, getting a bigger unit won’t do anything but leave you with higher bills. Instead, seal up your home to make your current unit 30% more effective.
Rusty, dirty, or leaky air ducts can result in a 20% loss of the air that leaves your air conditioner. This makes your air conditioner work harder, and keeps your home from getting as cool as you’d like. Making sure your ducts are regularly cleaned, and ensuring that they’re in good condition can help your current unit work more efficiently.
Your air filter helps keep particulates out of your air conditioner that could hinder the way it works. The filter needs to be changed every one to three months to ensure that air can continue to flow through it unimpeded.
If you haven’t changed your filter recently, dust, debris, and pet hair could be clogging it up, which makes your air conditioner work harder to pull air in. This lowers its efficiency and effectiveness —which could have you thinking you need a bigger unit, when you actually just need a new filter.
The best way to ensure that you have the right sized AC unit for your home is to schedule a consultation with a NATE-trained technician who can evaluate your home and let you know the best size for the job. You may be surprised to find that you need a smaller unit than you currently have to cool your home efficiently.
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I wanted to make sure my air conditioner was ready for summer. Fernando came out and made sure my unit was tip top. He was friendly, professional and not a sales man. Thanks Fernando!
Colin and Andrea were incredibly professional and knowledgeable. They did a great job representing the company. We will definitely contact them again for any HVAC needs that arise.
We woke up in the middle of the nite on memorial day to a hot house. I called precision at 6am and they were here before noon. Simple problem fixed, cool house. I love these guys!
Thank you Ray at Precision Air...the compressor on our AC went out last night and the house was HOT. This morning Ray was there to replace the compressor and had us feeling the cool air again in no time. Great customer service...quick response time and friendly from the first call until the repair was completed. Ray even offered to clean the filters! Thank you!!
I’m so glad I called Precision for my annual AC checkup!! Austin was professional, super friendly and answered all my questions. I’ve had more bad experiences with AC companies here in the valley than good ones. Precision Air will have all my hvac business going forward!! Thanks for being a reputable and honest company!!!
He did a great job; professional and knowledgeable! Kalin is the technician’s name and Precision Air and Plumbing should take a bow for hiring such an invaluable employee!!!
Precision Air is a company of integrity. I signed up with them August 1st, 2019 for their AC maintenance plan for 2 years... Someone from their office called me a week ago to set up their yearly maintenance visit. SO GRATEFUL.
Precision Air and Plumbing is a wonderful company to work with! They are very experienced and professional. They have helped us in our home for many years via a/c service and air duct cleaning.
It was time to replace our AC, and so our choice was Precision Air, as we've been with them for over 20 years. Teman & Julian did an excellent job on the installation today, arriving on time.