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Writer's pictureAudree Grubesic

How to Prepare Your HVAC System for Winter

As temperatures drop, it's essential to prepare your HVAC system to handle the colder months. The shift from cooling to heating can place stress on your system, but with a bit of maintenance, you can keep your home cozy and energy-efficient throughout winter. Here are five expert tips from The Unico System experts to help winterize your HVAC system.


Actual home using Unico System


1. Clean Ducts and Vents

Over summer, dust, pet hair, pollen, and other particles accumulate in your home’s ducts and vents. These clogs force your furnace to work harder, using more energy and causing uneven warmth. Cold spots can result when airflow is obstructed. Start by vacuuming around your intake and return vents, then remove vent grates to inspect for deeper clogs. Adjust the airflow in rooms that are harder to heat, especially on the first floor where more warm air is typically needed.


2. Replace the Air Filter

A clean air filter is essential for efficient heating. Dirty filters strain your HVAC system, pushing it to work harder and allowing more contaminants into your home. This raises energy costs and could affect indoor air quality. Inspect your filter by holding it up to the light; if it looks dark or is hard to see through, it’s time for a replacement. Generally, it’s best to replace the filter every 1-3 months for optimal performance.


3. Test the Heating Early

Before the cold weather fully sets in, turn on your heating system to run a couple of test cycles. Listen for any unusual noises or signs that it’s struggling to operate smoothly. Many manufacturers recommend running “warm-up cycles” to transition from cooling to heating. Check your owner's manual to confirm if this applies to your unit. If you notice any issues, it’s best to address them now, before your system is in constant use.



Unico system ceiling, floor and above stove duct solutions


4. Seal Doors and Windows

To keep the warm air inside, inspect your home’s insulation, particularly around doors and windows. Gaps or cracks in older homes allow air leaks, making your HVAC system work overtime to maintain temperature. Patch any leaks you find with weather-stripping or caulk. Creating an airtight seal helps your system run efficiently, reduces energy costs, and keeps your home consistently warm.


5. Inspect the Furnace Area

Your furnace needs adequate space to operate safely and efficiently. Before winter, ensure there’s a three-to-four-foot clearance around your furnace for optimal airflow. If your furnace is in a hard-to-reach spot, it’s worth calling in a professional for an inspection. Keeping the area around your furnace clear helps prevent blockages and reduces the risk of potential hazards.


Stay Warm with The Unico System

The Unico System is designed to deliver even, draft-free warmth with whisper-quiet operation. Its small-duct, high-velocity design means it fits seamlessly into any space, saving energy while providing consistent comfort. The insulated ducts prevent heat loss, helping you reduce your winter energy bill.


Want to learn more about how The Unico System can make your home more comfortable this winter? Find a Unico Preferred Contractor near you and discover the value, comfort, and efficiency this system can bring to your home!


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