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Sizing Considerations for Buying an Air ConditionerAir conditioner sizing is a critically-important consideration when you're planning to purchase new cooling equipment. According to the U.S. Department of Energy (DOE), an A/C's size needs to match the space it's going to cool. An undersized A/C will run for extended periods, use a lot of energy, but won't cool your home's interior sufficiently for comfort. An oversized air conditioner will only run for short cycles, so it won't dehumidify effectively or cool your living space efficiently.

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HVAC system , air conditioner , Tips , HVAC , air conditioner efficiency , air conditioner sizing

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"I absolutely loved the service we received from Hartman Brothers. They gave us an appointment right away, and the technician knew what our issue was based on my husband's conversation with the scheduler. As a result, he came prepared to fix our problem. The technician was also very nice and courteous. I would recommend everyone to give them a call for all your HVAC needs. Thanks Hartman for a job well done!"

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"I would recommend anybody that needs an air conditioning and furnace go to Hartman brothers very friendly, good service and will do you a good job. they have my business for now on!"

Richard W.
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"Hartman Brothers has always provided excellent service. From installing a new AC/furnace system to their biannual maintenance visits - they are the best!"

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"I have been a long-standing client of Hartman Brothers Heating & Air Conditioning. My continued patronage is a testament to the profound knowledge and expertise demonstrated by their team. While I have fortunately not required their support beyond routine service appointments, I am confident in their ability to provide exceptional assistance should the need arise."

George M.
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"On time and did a thorough cleaning and testing of my heating system. Very knowledgeable and explained everything regarding my thermostat. Friendly and professional looking forward to seeing him on our winter maintenance. "

Joe D.
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"I had an excellent experience with Hartman Brothers from start to finish. After dealing with an incomplete and frustrating repair from Peterman Brothers, Hartman Brothers was a breath of fresh air. Their technician spent several hours thoroughly troubleshooting my tankless water heater, walking through the issues clearly and professionally. There was no upselling, no pressure, and no shortcuts—just honest, methodical work. Based on their findings, I chose to upgrade to a new tankless water heater, and the decision was entirely mine. At no point did they try to push a sale or steer me toward anything unnecessary. The installation was clean, the communication was excellent, and the entire process felt transparent and trustworthy. It’s clear why they have such a strong reputation in the Fort Wayne area. Their professionalism, responsiveness, and genuine customer‑first approach really stand out. I’m very happy with the new system and with the service I received. "

Cory T.
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