Every contractor has that one client. The one you installed a few years ago, but that you still hear from. It may be to schedule regular maintenance, it might be for another reason, but sooner or later the conversation will always come around to one, recurring subject:

“Why is it still so much warmer/colder in room X than in room Y???”

And truth be told, it probably bothers you too. After all, you’re a professional HVAC installer, you want every customer to be happy. But you also know that no 2 jobs are the same, and no 2 solutions work every time.

But this question does give you the chance to build trust with the customer, assess their needs, and possibly provide an answer that results in long-term satisfaction and overall savings. To get to the answer the customer wants, you’ll want to work with them on a “Temperature Audit”. Here’s what that entails:

 

Room to Room, and Unit to Vent

Start with the issue at hand, and in the area’s the customer is familiar with. Go room to room with them, getting a temperature reading in each room, and asking the customer how it fluctuates through the course of the day, and how the room in utilized. Note the window location and condition, number of exterior walls, amount of sunlight, areas of infiltrations and other factors.

Now that they’ve told you their side of the equation, start working towards your side of things. Note the location of the HVAC unit, and how the ductwork is integrated into the house. Count and note vents, air returns, and travel paths. These are all parts of your work the customer is at least visually familiar with and will start to build the trust that will be important when it comes time to look at solutions.

 

Do Your Ductwork

It’s not likely that your customers understand the role of ductwork as the main component for distributing airflow in their homes. Perform a thorough inspection of their current ductwork to check for any areas that are damaged or leaking.  Highlight to the homeowner how leaks can cause the temperature variances they’re experiencing.

You should also examine how the ductwork is installed and where it’s installed.  Was it done correctly?  Is it installed in the right place to deliver maximum performance?  Does the ductwork to equipment capacity meet the recommended specifications?  Are there too many joints and elbows? Once you’ve got the answers to these questions, you’ll have the information you need to inform the homeowner of needed repairs or updated solutions to their issue.

One key piece of information to share with the customer is the role elbows, especially 90-degree ones can play in air flow. An easy way to explain it is that because of the air disruption and backflow such a sharp angle can cause, every right-angle elbow adds 30 feet to the “travel distance” air has to make from the main unit to the room vent. That bedroom on the second-floor west side? It may only be 30 feet from a basement unit, but if there are 6 elbows along the way, it might as well be in the neighbor’s house if the system wasn’t designed for it.

 

The Science of Thermal Dynamics

Again start with the basics – Hot goes up, Cold goes down. That may start to identify some of the issues. From there, it’s important to look at thermal dynamic effect of mixing return air throughout the home.  Let’s say the client is an empty nester who has shut off the vents in the now unused bedrooms. Great, but now the Master bedroom is humid and warm. Explain to them that while those rooms may not need to be as cooled as used rooms, by completely “cutting them off” you’re causing the return air to be much warmer and more humid than the system was designed for. Short-term gain, causing long-term pain.

 

The Significance of Staged Equipment

To gain the best performance and tackle temperature variance, staged equipment can be an important solution. Staging allows the equipment to run at peak conditions for a longer portion of the year optimizing comfort. When the heating is sized for extreme cold and we’re in a season that’s more chilly than cold short cycling causes drafts and ineffective operation. In the cooling season, designed for the worst the location throws at us AC’s become less effective in the mild seasons reducing humidity removal, causing short cycling, and driving up energy consumption with the more frequent starting of the compressor. Staging more closely matches the operation to the season improving comfort and performance for the customer.

 

How HVAC Zoning Can Help

For many of the issues causing temperature variance, HVAC zoning can provide an effective solution that improves airflow in your customer’s home and help them be more comfortable all year long.  Zoning is the ideal solution to promote as it provides your customers with many benefits, they may not have thought about before:

  • Multiple thermostats are installed to control airflow in rooms more effectively.
  • Usage patterns can be established upon installation to control airflow correctly.
  • Arzel Zoning systems are easily installed in their existing ductwork.

If HVAC zoning is right, work with your customer on a plan to group rooms, by location and usage, into the zones needed to mitigate their issues. South-facing room with older windows? Unused bedrooms? Master bedroom and on-suite bath? All can be grouped and planned out to provide year-round comfort. And the cost of a zoning system is in most cases far less expensive than solutions like new windows, new handlers, and ductwork or split systems.

 

Are you interested in learning more about zoning, and getting hands-on experience zoning with Arzel? Our Comfort College kicks off on October 1! Come learn more about key zoning topics, and allow our instructors to provide you with simple and easy techniques to increase revenue while also saving time on installation. Click here to sign up today!