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How to Extend the Life of Your HVAC System

There’s a good chance that your HVAC may be the most expensive system in your house and the one that uses the most energy. It consumes about one-half the energy used in your home as it works to keep you either warm or cool. It doesn’t matter if your system is the home’s original one or a recent upgrade, you can extend its life by taking a few simple steps.

Invest in regular, professional maintenance

While there are things you can do yourself, there is really no substitute for an annual or semi-annual inspection of your system by the professionals from Deljo Heating, Cooling & Plumbing.. An HVAC system is a complicated piece of machinery with many moving parts that contribute to its efficiency. Our certified technicians will clean and lubricate all those parts and check for possible problems before they turn into major repairs. Spending a little money now on regular inspections and maintenance will save you a lot of money in the long run.

Change your filters regularly

Clogged filters force your system to work harder to circulate clean air. So, we recommend checking your filters every 30 days and if clogged, replacing them with quality, pleated filters.

Have your ducts cleaned

The duct work carrying warm or cool air through your house is as susceptible to dust and debris buildup as any other parts of your HVAC system. Regular cleaning and maintenance will keep the unit running at maximum efficiency and add years to the life of the system.

Don’t close off vents and little used areas

It’s a myth that closing off vents and rooms saves energy. Closing vents and rooms for a forced-air system makes the unit work harder and increases energy costs.

Don’t neglect the outside unit

Two things you can do to maintain the outside unit include:

  • Cutting back any shrubs to provide at least two feet of clearance for the compressor/condenser unit.
  • Washing the compressor/condenser unit with your garden hose to clear away accumulated dirt, dust and pollen. But don’t use a pressure washer as this might damage the unit.

We hope you’ll find these tips helpful, and remember for the very best in Chicago heating and cooling service, call Deljo Heating, Cooling & Plumbing at 773-280-8251

and let our NATE certified technicians work with you to extend the life of your HVAC system.

Client Testimonials

Read the opinions of our satisfied customers.

5 stars

This was my first time as a Deljo customer, and I was very pleased. My technician, Giovanni, was very thorough and diligent. He serviced my furnace and identified a faulty sensor that was causing the unit to shut itself down. Deljo ordered the part, and Giovanni replaced it a few days later. Overall, the team at Deljo was great. The dispatcher kept me informed about Giovanni’s arrival time, and the supervisor assisted Giovanni when he was diagnosing the problem with the furnace. I highly recommend Deljo.

Paul D. 10/15/2026

5 stars

I’ve used Deljo for over 10 years now and they always do a good job. Izzy was the technician for this visit and he did an excellent job with my winter maintenance on my multiple units in the household. He also addressed an issue while cleaning the furnace blower wheel. His communication was clear and concise with what he planned to do to address the issue quickly. He was confident and I had 0 concerns or questions. Great job Izzy!

Jeff S. 10/14/2026

5 stars

Paul was great! Arrived on time and completed maintenance on my humidifier, tankless water heater, and two furnaces. All work was performed under my Gold Star maintenance program, so all maintenance charges were covered. Paul did provide a few proposals for additional services on furnace & tankless water heater, but those were emailed to me for further consideration. Paul was friendly, knowledgeable, and answered all my questions.

Jack N. 10/12/2026

5 stars

Gabe did an excellent job with our annual service visit. He arrived in the early part of our service window, was friendly and knowledgeable, and got the work done in a very reasonable amount of time. I have great confidence in Deljo, and am a long-time customer.

Ruth C. 10/9/2026

5 stars

I’ve been using Deljo for 20 years for HVAC but now venture into enlisting their plumbing services. Bashar was very courteous, efficient & informative, and I’d definitely request him again for the next plumbing job. Great experience!

Christopher R. 10/2/2026

5 stars

Working with Deljo is always a good experience, and today’s appointment with Izzy was no different. He was able to come early which actually worked better with our schedules, but called me ahead of time to make sure that was okay. He was friendly and knowledgeable when he explained the work he had done during his visit and our options for fixes. He was also able to schedule a quote appointment for us while he was still here. We would highly recommend working with Izzy and the Deljo team!

Lauren H.  9/25/2026

5 stars

Drew performed the seasonal maintenance on my AC. It needed some repairs and updates and he was able to fix everything at the same appointment. He also noticed issues with the hot water heater and we were able to get ahead of that, as well.

Emily W. 9/11/2026

5 stars

I would leave six out of five stars if I could! My technician Jorge went above and beyond on his service. There was buildup in the rental property’s toilet from the previous tenant. One maintenance person did a surface level job of cleaning but did not fully remove the obstruction. Jorge went above and beyond and came to a solution and even explained the perpetual problems older toilet models can cause. Moving forward with this insight, I can perform my own upkeep the previous tenant did not. Thank you kindly!

Kayla K.  9/15/2026

5 stars

We just had our new boiler installed by Jonathan and Carlos. First rate work! They arrived on time, removed the old boiler, installed the new unit, and explained the features. Both guys were pleasant. Bring on the cold this winter! We are ready thanks to the team from Deljo.

Edward B.  6/26/2026

5 stars

Deljo’s heating and cooling team was awesome to work with. As a first-time homeowner, I really appreciated how clearly they explained everything and answered all my questions. From the quote to the install and follow-up, the service was top-notch. Highly recommend!

Lindsey A. Chicago, IL

5 stars

Matt did an amazing job. He serviced our home and our rental property. He gave us options to help our systems run more efficiently. He also told us about Deljo’s new plumbing inspection which was very affordable. He is great!

Jordan R. Chicago, IL

5 stars

We had a problem with our Humidifier and called Deljo. Jesus came out to help and was amazing. He was extremely knowledgeable, detail oriented, and super courteous. Amazing customer experience!

Jeff C. Chicago, IL

5 stars

Jordan and Jesus were extremely helpful and knowledgeable! We would 100% work with them and have them back. They were both very professional and efficiently fixed our heating system.

Emily L. Chicago, IL

5 stars

Shout out to Ernesto for coming out and servicing our furnace and air con. Deljo provides a great service and glad to trust them with our HVAC for our small business.

Lauren H. Chicago, IL

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