You winterize your home’s interior by reversing your air vents and ceiling fans, sealing drafty windows, replacing worn weather stripping, swapping out your furnace filter, testing your smoke alarms, clearing out your dryer vent, and having your chimney professionally inspected. I’m Kevin Grolig, a real estate agent with Compass in Bethesda, and this is the follow-up to last week’s Real Kevin video where I covered the seven exterior steps to winterize your home. Today I’ve got eight interior items that protect your home and cut your energy bills, and none of them require a contractor or a big budget. If you already knocked out the exterior list, this is how you finish the job before the cold really sets in.
I see what happens when homeowners skip this stuff, both in my own listings and in homes I help clients buy. A furnace that hasn’t had its filter changed in two years, a chimney nobody’s had swept, smoke detectors that don’t meet Maryland’s current code, these are the kinds of things that turn into expensive surprises or inspection red flags. Let’s get into the eight items.
How do you reverse your vents for winter?
You reverse your vents by closing off the ones in upper-level rooms and opening the ones on your lower level. Heat rises, so if you live in a home with more than one floor and your bedrooms are upstairs, shutting the vents up there and opening the vents downstairs helps push warm air where it’s needed and regulate the temperature floor to floor. It’s a five-minute adjustment that makes a real difference in how evenly your home heats.
Should you reverse your ceiling fans in winter?
Yes, if you have ceiling fans, you want them set to reverse mode for the cold months. Reversing the direction of the blades pushes warm air that’s collected near the ceiling back down into the room instead of just churning cool air across your space. Most fans have a small switch on the base to flip the direction. It’s an easy adjustment that helps your furnace work less hard to keep the room comfortable.
How do you seal drafty windows?
You seal drafty windows with an inexpensive insulator kit, especially if your home has older or cheaper windows that let air through. A product like the 3M window insulator kit, available at Walmart, Home Depot, or Lowe’s, is simple to install and creates a barrier that keeps cold air out and heated air in. This is one of the cheapest fixes on this list relative to how much it saves you on heating costs over a full winter.
When should you replace weather stripping around your doors?
You replace weather stripping as soon as you notice it’s cracked, deteriorated, or falling off around any door leading from the outside in. Walk your home and check every exterior door. Weather stripping is inexpensive and takes minutes to install, but old or missing stripping lets cold air pour straight into your house, which drives up your heating bill all winter long.
How often should you change your furnace filter?
You should change your furnace filter monthly, though most homeowners let it slide because it’s easy to forget. Think of it like changing the oil in your car. Skipping it doesn’t cause an immediate problem, but it wears down performance and shortens the life of an expensive piece of equipment over time. A clean filter keeps your furnace running efficiently and extends its lifespan. My suggestion: buy a 12-pack of filters at Lowe’s or Home Depot in one trip, then set a recurring monthly reminder on your phone so you and whoever else lives in your home actually stay on top of it.
Are your smoke alarms up to code in Maryland?
If you live in Maryland, your smoke detectors should have been updated to meet the state’s compliance requirements back in 2018, and it’s worth confirming yours are current. Beyond the legal side, simply press the test button on each detector to make sure it’s actually working. This matters more in winter than you might think. There are roughly twice as many house fires during the winter months compared to summer, largely due to heating equipment and holiday cooking, so a working smoke alarm is one of the cheapest forms of insurance you can check in thirty seconds.
How do you clean out your dryer vent?
You clean out your dryer vent by removing it from both the back of the dryer and the wall, then clearing out any lint trapped inside. This goes beyond just emptying the lint trap before each load. Detach the vent hose, pull out the built-up lint, and check the wall opening for any additional lint that’s accumulated there too. One important note: if you have a gas dryer, don’t just yank the unit away from the wall. Move it carefully so you don’t disrupt the gas line connection. A clogged dryer vent is a well-documented fire hazard, so this is not a step to skip.
Why do you need a professional chimney inspection?
You need a professional chimney inspection because creosote buildup inside the flue is a leading cause of house fires every winter, and this isn’t a job for the average homeowner. Hire a certified chimney sweep company to inspect and clean your fireplace and chimney before you start using it for the season. While they’re up there, have them check that the top of the chimney is properly screened so birds and squirrels can’t get inside and build a nest that blocks the flue.
For more ways to cut your energy costs and seal up your home this season, the Department of Energy’swinterization tipsare a solid resource to pair with this checklist.
Frequently Asked Questions
What’s the difference between interior and exterior winterization?
Exterior winterization protects your home’s outside from ice, water intrusion, and storm damage, things like gutters, hose bibs, and landscaping. Interior winterization focuses on how efficiently and safely your home runs once the cold sets in, covering heating distribution, fire safety, and equipment maintenance.
How often should I really change my furnace filter?
Monthly is the standard recommendation. Buying filters in bulk and setting a recurring phone reminder is the easiest way to actually stick to it instead of letting it slip for months at a time.
Do I need a professional for my chimney, or can I inspect it myself?
Hire a professional chimney sweep company. Creosote buildup isn’t always visible from the ground, and a trained inspector can catch issues, including improper screening at the top of the chimney, that a homeowner would likely miss.
Why does Maryland require updated smoke detectors?
Maryland updated its smoke alarm requirements in 2018 to improve fire safety statewide. If you haven’t confirmed your home is compliant, it’s worth checking, especially since winter sees roughly double the house fires of summer.
Does interior maintenance like this matter if I’m planning to sell?
Yes. Buyers and inspectors notice neglected furnaces, outdated smoke detectors, and dryer vent lint buildup during a home inspection. Staying on top of interior maintenance keeps your home in better condition and avoids surprises when it’s time to list. Check out myguide to selling a homefor more on getting your house market-ready.
That’s my list of eight interior winterization steps to pair with last week’s exterior checklist. If you’ve got a tip I missed, drop it in the comments, I’d love to hear it. Thanks again for checking out Real Kevin.
If you’re thinking about buying or selling in Montgomery County and want to talk through your home’s condition, timing, or value before winter hits,reach out to me directlyor grab time on my calendar below.
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