Thank you for visiting Rosie On The House, the online home to Arizona's longest running weekend radio broadcast!
[aws_search_form]

Buyer Beware! Best Practices for Purchasing an AC Unit

There are many ways you, as a consumer, can choose to purchase various construction-related products and services for your home. Websites, mailers, and even website-based suppliers make it possible to buy everything from screwdrivers to air conditioning units. While buying directly from an online company may give you the impression that you are saving money, there is often room for error. There is a risk of making the wrong choice on larger products without a skilled salesperson or technician to guide you in answering the right questions. There may be hidden fees and limited return policies as well.

With the summer months rapidly approaching, we reached out to Rosie Certified Partner Steve Mason of Mason Pro Services to explore some of the potential pitfalls you might face when purchasing Heating and Air Conditioning products or services from remote suppliers.

Steve says that the main take away for the homeowner is ‘A lower-end system installed with excellence will likely outperform a higher-end system that is installed poorly’. 

Steve and Challen, their Home Solution Advisor, wanted to share some of the services needed to select an appropriate HVAC system for your home.

Beware The ‘Pick Your Own’ Product

Some companies will sell a product with little or no information from the consumer, leaving out the necessary predesign analysis to purchase the right unit for your home.

Steve mentioned that plenty of online companies will be glad to sell a unit that will not be what you want or need.

In addition, rebates from local utilities such as SRP or APS add a cost-saving component to your HVAC choice that is often overlooked and not part of the online sales process.

A Reputable Contractor Will

  • Send a trained tech to your home to assess your HVAC unit properly. There is no such thing as a ‘rule of thumb’ when it comes to selecting the correct size HVAC unit for your home. The only way to know what the correct size unit is by performing a Manual J heat load calculation. The online seller cannot provide this calculation without being on site.

    Your Ac installer should be an employee of your AC provider
  • Make an initial assessment as the foundational step to choosing the right unit. This assessment analyzes your home’s heat loss/gain. The analysis examines windows, doors, wall insulation, and home orientation to the sun which then determines the correct size unit for your home.
  • Assure the connections are correct– It is extremely important to have the correct size duct connections to match up to your new unit. A remote salesperson will not be able to see what is needed and ensure that the system can move the proper amount of air as the manufacturer designed it. Using the wrong sized connections would be like putting the wrong size tires on your car which will cost you more money to operate and reduce the life span and comfort.
  • Research rebates from utility companies. There are often rebates available from utility companies. A good contractor will know which ones will apply to their customers. The utility companies that offer these rebates know that the correct size unit will reduce electrical consumption. 
  • Schedule the installation with their own team.  It is most beneficial to have the company that sells you the equipment be the same as the company that installs it. Having a third party install the equipment does not assure you that the correct steps of installation will be taken. Additionally, whoever installs the unit is now your warranty company for the next 2 years. Do they have the correct technicians to warranty any repairs or are they just an installation company?

Some Cautions to Consider for Design and Install:

Permits

Check to see if a building permit is required when changing an existing system for a new one. Most building departments require a permit to ensure compliance with new regulations and industry installation standards.

Design

  • Refrigerant Requirements -New mandates by the federal government are focused on the type of refrigerant an air conditioning system uses. Fueled by wanting to have less impact on climate change, it is essential to install the new refrigerant correctly. The performance of your old AC unit that has R-22 or R-410A will now be different with the new refrigerant. 
  • Sizing-It is critical to know what size system you need and have the correct equipment match up. For example, a 4-ton system capacity will vary depending on the brand and equipment match up. Knowing this makes sizing your system more like a custom system, not a rule-of-thumb system.

Install

The installation process is intricate. Proper installation ensures that your new HVAC unit will perform efficiently. And the warranty is contingent on installation according to very specific specs. 

Proper Installation Includes

The top copper tubing was installed with the brazing technique which provides the best seal
  • The solid connection between the new unit and the existing ductwork. Challen recommends a hard metal duct work connection with properly installed joints. He cautions us to beware of the installer, who only uses duct tape to make the seal.
  • Specific placement of hangars. When new equipment is installed in an attic, the hangers used and where they are placed are important.
  • Connection of copper lines. When brazing the copper lines following manufacture specification is extremely important and one key element is purging dry nitrogen in lines to eliminate oxidation and creating contaminants  

Before You Sign on the Dotted Line

Before signing the contract, ask about follow-through or Quality Control

The follow up should be scheduled for 2- 5 days after installation.  In the follow up inspection, the contractor can confirm if the system is at manufacture refrigerant specification or if they will need to add additional refrigerant. 

Another reason for waiting 2 to 5 days after the installation is it allows the system to run and bring your home at the correct temperature. When homes are 85 degrees or higher inside, the manufacturer does not have charts to follow in ensuring it charged correctly. 

In closing Steve reminds us “A lower-end system installed with excellence will likely outperform a higher-end system that is installed poorly.”

Now that makes some sense!

###

PODCAST

April 12th, 2025

A well maintained air conditioner can last longer than its initial lifespan. Go with the pros in the know with Steve Mason and Challen Hansen of Mason Pro Services. They explain why buying an air conditioner on line is never a good idea. Maintenance tips for lasting A/C units. The single important calculation when checking a unit’s efficiency. And the increase of technicians turned commissioned salespeople suggesting work you might not need.

Original Broadcast Archive Page With Expanded Content

PHOTO CREDIT

  • Mason Pro Services

Subscribe to Our Newsletter

This field is for validation purposes and should be left unchanged.

Related Posts

Popular Posts

Leave a Reply

Your email address will not be published. Required fields are marked *

Leave a Reply

Your email address will not be published. Required fields are marked *

Event Promotion Request

  • This field is for validation purposes and should be left unchanged.