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Deljo Heating & Cooling

How Much Does It Cost to Run AC?

When summer heat settles into Chicago, your air conditioner can quickly become one of the hardest-working systems in your home. It can also become one of the biggest reasons your electric bill goes up. If you are wondering how much it costs to run an air conditioner, the answer depends on your system type, electricity rate, home size, thermostat setting, and how often your AC runs. As Chicago’s trusted air conditioning experts since 1922, Deljo Heating, Cooling & Plumbing helps...

How to Replace an Air Filter in an AC or Furnace

Changing your HVAC air filter is one of the easiest ways to protect your heating and cooling system. A clean filter helps...

The Importance of Whole-Home Drain Cleaning

Many homeowners follow an "out of sight, out of mind" philosophy when it comes to their plumbing. If the water vanishes down...

Deljo Hits the Tracks: Our New Metra Train Wrap

For over 103 years, Deljo Heating, Cooling & Plumbing has been a fixture in the lives of Chicagoans. We’ve been in your...

January 16, 2026

How to Drain Your Water Heater (And When You Should Call a Pro)

If your water heater has started making loud popping or rumbling noises, you are likely hearing the sound of steam bubbles escaping...

November 13, 2025

Furnace Short Cycling: Normal Cycle Times & Fixes

When your furnace keeps turning on and off more often than seems normal, it’s easy to wonder what’s going on. You might...

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