A/C Replacement: Now’s the Time to Do Your Homework Before You Choose a System

Posted On: May 05, 2013

Choosing an A/C replacement involves three important steps, and you’ll get better performance if you go through each one individually. Air conditioners are complex systems, and you’ll need to size it properly, select its energy efficiency, and ready your home for its installation.

Sizing

Sizing makes a difference in how well the air conditioner will work and how long it will last. Bigger is not always better, and there’s little guesswork involved because skilled HVAC contractors use a tool called Manual J to calculate a home’s cooling load, in order to determine the right size air conditioner. Each home is different, and Manual J takes into account your home’s size, energy efficiency, your preferred temperatures, home design and family size, among other factors, in order to calculate its cooling load. You can also improve insulation levels and seal air leaks to reduce the cooling load, thereby allowing you to buy a smaller A/C.

A system that’s too large will short-cycle, which drives up energy bills and increases the wear and tear on the system. Air conditioners use a lot of electricity when they first start. Those short bursts of energy create more wear on the parts than when they’re running at a more continuous but lower level. Short-cycling also leaves more humidity in the air. Systems that are too small won’t cool your home when the weather is at its hottest.

Energy efficiency

Once you know the size for your A/C replacement, you can move on to energy efficiency. In this country, new central A/Cs must have a minimum 13 SEER (seasonal energy efficiency ratio). Systems that have higher SEER ratings will lower your energy consumption. It’s a good idea to choose the highest efficiency your budget can handle, since air conditioners last for many years and you’ll immediately see the payback in lower electric bills.

Installation

The HVAC contractor needs to analyze your ductwork system before the air conditioner is installed and seal all ducts to optimize efficiency. You’ll also have to select a location for the outdoor condensing unit that’s free from landscape debris and doesn’t have a lot of exposure to the sun.

If you would like more information about an A/C replacement and what’s involved, please contact us at Ernst Heating & Cooling. We’ve provided quality HVAC services to the Metro-East area since 1954.

Our goal is to help educate our customers in Hamel, Illinois and surrounding areas about energy and home comfort issues (specific to HVAC systems).  For more information about A/C replacement and other HVAC topics, download our free Home Comfort Resource guide. 

Image courtesy of Shutterstock

Service in Hours- Not Days
What People Are Saying About Ernst
  Reviews for Ernst Heating & Cooling

202 customer reviews

Average rating:5

 
  Always Thorough
We’ve kept our service agreement for years and have never been disappointed. Ernst has knowledgeable techs who are...
by Lisa W on 08/10/2018
  AC unit would not...
Seth came out to fix our unit. He was friendly, fast, and explained the problem well. We will always call Ernst for...
by Erin M on 08/01/2018
  Best Around!
By far the best around! They are quick and are very knowledgeable.
by matt c on 08/01/2018
  Always great...
Would recommend to family and friends.
by Jay R on 07/21/2018
  Disappointed
We pay about $250 a year for maintenance and recently had our air conditioner’s annual checkup. Ernst’s serviceman...
by DJ B on 07/20/2018
More Verified Reviews
Service in Hours- Not Days
Reasons You Should Replace Your Window AC Unit
Posted On:June 25, 2018

Nobody likes the idea of spending thousands of dollars on central air conditioning, which makes the window air conditioning unit an attractive option for those...