the house stands near the flame of a gas boiler.

How Does My Gas Furnace Work?

November 21, 2025

Our team at Design Flow Heating & Cooling can help you save big bucks on your monthly utility bill by replacing your aging furnace.

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How Can I Lower My Heating Bill This Winter?

November 14, 2025

Are you anticipating a higher heating bill this winter? Here in Eldersburg, temperatures can get pretty low. Energy cost are also on the rise with local provider rate increases. The only way to ensure you remain perfectly comfortable inside your home is by cranking up the heat.

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Whole-House Fans vs. Attic Fans. Photo of a technician installing a ceiling fan.

Whole-House Fans vs. Attic Fans

October 24, 2025

Whole-house fans and attic fans play significant roles in enhancing air circulation and reducing reliance on air conditioning systems.

But which one does a better job of ventilating your Eldersburg home?

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Woman carrying firewood on a trail in the woods with her dog.

How Do I Know When It’s Time to Buy a New Furnace?

October 17, 2025

Our team of professionals will guide you and provide you with everything you need to know about your heating and cooling systems.

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Why Do I Need a Humidifier in the Fall?

September 19, 2025

Fall is a beautiful time of the year—but it comes with a drop in humidity levels. If you’re concerned about the humidity change and want to enhance your comfort inside your Eldersburg home, installing a humidifier is an excellent option.

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Schedule Your Annual Furnace Inspection Now

September 12, 2025

What’s at the top of your fall to-do list in Eldersburg? Make sure it is your furnace.

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How Do I Know I Have a Cracked Heat Exchanger? A working heat exchanger.

How Do I Know I Have a Cracked Heat Exchanger?

February 21, 2025

Your helpful neighbor suggested the issue you are having with your gas furnace sounds like it could be due to a cracked heat exchanger. What is a heat exchanger? How can you tell if this is the issue? What should you do about it? 

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Is My Furnace Overheating? Photo of a sister and brother lounging by a window, playing on their phones.

Is My Furnace Overheating?

February 14, 2025

Just about any electrical appliance has the potential to overheat, and furnaces are no exception. As a homeowner, you need to take precautions to lower the risk of an overheated unit. You should also be wary of the associated symptoms so you know when to take action.

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Full shot of mother and daughter talking in the kitchen. They are having a discussion with each other in the kitchen giving each other high fives, wearing casual clothing.

A Guide of Commonly Asked Questions About Refrigerants in 2025

January 24, 2025

Our team has the answers for residents of Ellicott, MD, and all the surrounding areas. In this comprehensive guide, we will cover the following:

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Three Reasons to Consider a Geothermal Heat Pump

January 17, 2025

Geothermal heat pumps have been in use since the 1940s, heating and cooling homes in the Eldersburg area efficiently and thoroughly. They use the constant temperature of the earth for their heat transfer medium instead of the outside air temperature as air-source systems utilize.

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Need HVAC Service?

Contact the experts at Design Flow Heating & Cooling.

Call us at 443-878-8278!