Preparing Your HVAC System for Winter

You may be enjoying the breezy fall air, but something far less tepid is lurking on the horizon—winter chill.

This means it’s time to get your home’s HVAC system, as well as any ventilation components, ready for difficult conditions that can really test their mettle. Take the following steps, and you’ll better ensure that you experience efficient and reliable heating throughout the coming months while keeping your vital equipment in top shape until spring arrives.

Changing filters

Start with one of the simplest yet most crucial tasks: checking all the filters throughout your home, including those directly in your heating and cooling equipment and any you may have in return-air vents. Once dirty or clogged, these protective layers may begin congesting your ducts and other machinery, forcing them to work harder to suit your indoor-temperature needs. In turn, you could see your energy costs increase or even experience consequences such as a decreased HVAC lifespan.

To save money and help catch as many pollutants as possible, clean or replace your filters at least once every ninety days. However, be aware that this timeline can vary depending on certain factors. For instance, those sensitive to dust, pet dander, and other allergens may need to change them more often, approximately every thirty days. Similarly, larger homes may necessitate more frequent swaps due to greater overall airflow.

The ideal frequency can also vary depending on the features of your chosen product. Flat and fiberglass filters are typically less hardy than pleated paper ones, giving them a shorter longevity. Another consideration is the MERV (Minimum Efficiency Reporting Value) rating, which is a measurement of a filter’s particle-capture capabilities; the higher the number, the more pollutants it blocks and the faster it may clog. For the best estimate of replacement and cleaning timelines, check the recommendations on the packaging.

Cleaning up

A clean HVAC system is a healthy one, so take care to clear your vents and air ducts before frost hits. If you have a ductless unit such as a ceiling heat pump, carefully vacuum its external body, including the vents, with a soft brush attachment—just be mindful not to disturb the internal components since doing so can potentially impact performance. Should you have a central-air system with indoor ducts, vacuum away dust and other buildup from your exterior heat pump or air conditioner; be sure to remove any debris like leaves that may have collected around it as well. Then brush the return-air vent grates, open them, and carefully vacuum the areas you can reach.

For an outdoor air conditioner, a crucial follow-up step is to blanket it in an AC cover to protect it from leaves, frost, and snow, depending on your region. Bear in mind, though, that it can’t operate properly when placed in this hibernation mode, so only cover the appliance when you’re certain you won’t need cooled indoor air.

Of course, despite all your careful cleaning, you may still notice dust visibly flowing out of vents, foul-smelling air, or respiratory symptoms like sneezing when the system operates. While these signs can be attributed to other issues, they often point to dusty ductwork. Professionals and their commercial-grade vacuums can intervene by deep-cleaning throughout these conduits in areas you cannot reach.

But even if you don’t spot any problems, it’s still advised that you have your ductwork cleaned every three to five years, or more frequently if pets, smokers, or people with allergies live in your home. Consider this a priority before winter because you’ll need clean vents to distribute heat efficiently and keep you more comfortable in the coming months.

Identifying potential issues

Running the heat or air-conditioning daily can take a toll on the system’s various components, so do a walkthrough of your home to spot any possible issues that need addressing—either by you or by an HVAC technician, based on their severity. These are the top troubles to look for in autumn.

Drafts

Feel around your exposed ducts for any air leaks, then cover the gaps with duct tape (the product’s actual intended use!). This can help prevent air loss and preserve system efficiency. Likewise, physically inspect your doors and windows for escaping air, and seal any such areas with caulk or weather stripping.

Clogged condensate line

Cold condensate lines can freeze, blocking drainage with ice and potentially leading to odors or even water damage. To prevent this, keep your indoor temperatures above 55 degrees and wrap exposed pipes in heat tape or insulation. And if you do suspect a clog, call a technician for assistance.

Nonresponsive thermostat

Set the dial to blow cold or warm air at your command, and wait to hear if the system kicks on and adjusts the temperature. If it doesn’t respond promptly, you may have to reset the thermostat or change its batteries. Contact a pro should issues persist.

Scheduling maintenance

Finally, don’t underestimate the significance of a professional tune-up. Just as you need regular checkups from your doctor, your heater, air conditioner, ductwork, and other components require professional inspection—whether or not you’ve detected any of the problems indicated above. It’s recommended that you schedule one semiannually: once in fall and again in spring.

Aside from catching potential hidden or future complications, an expert may suggest various services, such as an internal-components cleaning. You might be tempted to skip these tasks and save a buck, but preventative action can help generate ongoing energy savings and prolong the life of your entire HVAC system. And, perhaps most importantly, a technician can gear up your equipment for the long, trying days of labor ahead, ensuring that it’s up for the task.