December home maintenance tips for a safer winter home
December home maintenance should focus on the problems that become more likely as temperatures drop: heating fires, carbon monoxide exposure, frozen pipes, power interruptions, poor indoor air and unsafe use of home medical equipment. A practical checklist is not just about getting the house ready for guests. It should help the home stay warm, dry, accessible and safe if a storm, outage or holiday schedule disrupts normal routines. The priorities below combine homeowner tasks with safety guidance from agencies and organizations such as the U.S. Consumer Product Safety Commission, the U.S. Department of Energy, the FDA, the CDC, FEMA, the U.S. Fire Administration, EPA, NFPA and the American Lung Association. For more seasonal upkeep guidance, visit the Maintenance Tips section.
Start with fire and carbon monoxide safety
December is a useful time to check life-safety systems because heating equipment, candles, fireplaces, holiday cooking and backup power equipment may all be used more often. NFPA research has reported that nearly half of home heating equipment fires occur during December, January and February. CPSC has also warned that portable heaters are involved in a meaningful number of residential fires, deaths and injuries each year.
Test smoke alarms and carbon monoxide alarms, replace batteries where needed and confirm that alarms are not past their listed service life. The U.S. Fire Administration recommends smoke alarms inside every bedroom, outside each sleeping area and on every level of the home, including the basement. Carbon monoxide alarms are especially important near sleeping areas and in homes with fuel-burning appliances, fireplaces or attached garages.
Carbon monoxide is dangerous because it cannot be seen or smelled. The CDC describes it as an odorless, colorless gas that can cause sudden illness and death. In December, review the sources that may produce it: gas or oil furnaces, boilers, water heaters, fireplaces, wood stoves, portable generators, charcoal grills and vehicles left running near enclosed spaces.
- Keep space heaters at least three feet from bedding, curtains, paper and furniture.
- Plug electric space heaters directly into a wall outlet rather than an extension cord unless the manufacturer specifically permits it.
- Never use an oven, gas range, charcoal grill or outdoor heater to warm indoor rooms.
- If a carbon monoxide alarm sounds, move everyone to fresh air and call emergency services.
Service heating equipment before heavy winter use
A heating system can run much harder in December than it did during the fall. Replace or clean HVAC filters according to the equipment instructions, and do not block return vents with furniture, storage bins or holiday decorations. The U.S. Department of Energy advises regular filter checks because restricted airflow can reduce comfort and efficiency.
If the home uses a furnace, boiler, heat pump or fuel-burning appliance, confirm that professional service is complete or scheduled. Annual service can identify worn parts, poor combustion, venting problems and airflow issues before a cold snap makes repairs harder to arrange. Homeowners should not open sealed combustion chambers or attempt repairs that require a licensed technician.
Inspect exterior vents after snow, ice or drifting debris. EPA winter indoor air guidance notes that outside furnace, stove, fireplace, radon and dryer vents should be kept clear of snow and ice to help prevent indoor pollutant buildup, including carbon monoxide. This check matters most after storms, roof work or landscaping changes that could block air movement.
| Area to check | December task | Why it matters |
|---|---|---|
| Furnace or heat pump | Check filter and schedule service if overdue | Supports airflow, efficiency and safer operation |
| Fireplace and chimney | Confirm cleaning and inspection before frequent use | Reduces smoke, draft and creosote-related fire risks |
| Dryer vent | Clear lint and check outside termination | Improves drying performance and reduces lint fire risk |
| Exterior intake and exhaust vents | Remove snow, leaves and stored items | Helps combustion appliances and ventilation systems work properly |
Prevent frozen pipes and water damage
Water damage often begins with small oversights: an uninsulated pipe in a crawl space, a hose left connected, a gutter full of leaves or a poorly sealed gap near a basement sill. Before freezing nights become routine, disconnect garden hoses, drain outdoor faucets where applicable and install insulated covers on exterior spigots.
Look for vulnerable pipes in unheated garages, crawl spaces, attics, basements and exterior walls. Pipe insulation is inexpensive, but it should be installed without compressing the material or blocking access to shutoff valves. If a section has frozen in past winters, treat it as a priority rather than assuming a mild start to December means it is safe.
Find the main water shutoff and make sure adults in the home know how to use it. Labeling the valve can save critical minutes if a pipe bursts. If the home will be empty during holiday travel, set the thermostat high enough to protect plumbing, open cabinet doors under sinks on exterior walls when appropriate and consider asking a trusted person to check the home after severe weather.
- Clean gutters and downspouts so meltwater can drain away from the roof and foundation.
- Check attic insulation and ventilation for signs of moisture, staining or air leaks.
- Move stored items off basement floors if the area has a history of seepage.
- Test the sump pump by pouring water into the pit if the manufacturer’s instructions allow it.
Reduce energy waste without creating health or safety problems
December energy savings should begin with air sealing and sensible settings, not unsafe shortcuts. The Department of Energy has stated that sealing uncontrolled air leaks can save 10% to 20% on heating and cooling bills, depending on the home and the work performed. Drafts around doors, windows, attic hatches, recessed lights and plumbing penetrations can make rooms uncomfortable even when the thermostat is set correctly.
Use weatherstripping on doors, caulk suitable gaps around trim and seal attic bypasses if they are accessible and safe to reach. Close fireplace dampers when no fire is present, but never close a damper while embers remain. Open curtains on sunny south-facing windows during the day and close them at night to reduce discomfort from cold glass.
Be cautious with thermostat setbacks in homes where older adults, infants, medically fragile residents or temperature-sensitive medical devices are present. A lower setting may save energy, but comfort and health needs come first. Some home medical devices, medications and supplies also have manufacturer storage ranges. If instructions specify temperature or humidity limits, follow those requirements rather than a general energy-saving rule.
Water heating is another practical December check. The Department of Energy’s household guidance commonly points to 120°F as an energy-saving water heater setting for many homes, but households should consider scald prevention, appliance requirements and medical needs before changing settings. When in doubt, follow the water heater manual or ask a qualified professional.
Check home medical devices and backup power plans
For households that use oxygen concentrators, CPAP equipment, ventilators, suction machines, powered mobility devices, infusion pumps or refrigeration-dependent medical supplies, December maintenance should include a device-specific readiness check. The FDA advises home medical device users to know what each device needs to operate safely, including electricity, running water, telephone service or computer connections.
Keep the instructions for use near the device, confirm alarm meanings and write down supplier, manufacturer, clinician and emergency numbers. If a device depends on electricity, check battery status, charging cords, backup batteries and generator instructions before storms are in the forecast. The FDA also recommends notifying the electric company and fire department when a household has a medical device that needs power, such as a ventilator or apnea monitor. See also: clinical equipment.
After any power interruption, check whether device settings have changed. The FDA notes that some devices may reset to a default mode when power is interrupted. Do not assume a device is still configured correctly if it has been unplugged, moved, exposed to moisture or connected to backup power.
Oxygen safety deserves special attention in December
Medical oxygen is not flammable by itself, but it supports combustion and can make materials ignite or burn more rapidly in an oxygen-enriched area. NFPA and the American Lung Association both emphasize no smoking and no open flames around home oxygen. Keep oxygen cylinders, tubing and concentrators away from candles, fireplaces, gas stoves, space heaters and other heat sources. A five-foot separation from heat and flame is a common safety guideline used in oxygen safety education.
- Do not use petroleum-based lotions, oils or grease near oxygen equipment unless the supplier confirms they are safe.
- Post no-smoking and no-open-flame reminders where visitors can see them.
- Keep oxygen tubing out of walking paths to reduce trip hazards.
- Follow the prescribed oxygen flow rate and contact the clinician or supplier before making changes.
Use generators only outside and away from openings
Portable generators create both electrical and carbon monoxide hazards. CPSC and CDC safety materials consistently warn against using generators inside a home, garage, basement, crawl space, shed or enclosed porch. They should be used outdoors, far from windows, doors and vents, with exhaust directed away from the building. If a generator is part of a medical-device backup plan, ask a qualified electrician about transfer equipment and load limits before relying on it during an outage.
Make the home safer for guests, caregivers and everyday movement
December maintenance is also about access. Shorter daylight, snow, packages, decorations and extra furniture can turn familiar spaces into trip hazards. Clear walkways from bedrooms to bathrooms, remove loose cords from traffic paths and add night lights where people may walk after dark. If a caregiver visits the home, make sure entrances, steps and device locations are easy to reach.
Holiday decorations should not block exits, cover alarms or run cords under rugs. Inspect extension cords for damage and avoid overloading outlets. Keep real trees watered, follow the manufacturer’s instructions for artificial trees and lights, and discard damaged light strings. Candles should be placed where they cannot be knocked over, but battery-operated candles are safer in homes with oxygen use, pets, children or mobility concerns.
Outside, stock pet-safe ice melt if needed, check handrails and keep snow shovels or traction tools accessible. If a resident uses a walker, wheelchair or oxygen cart, a shoveled path may need to be wider than a standard footpath. That small detail can make medical appointments, deliveries and emergency access safer.
A practical December checklist by priority
Use this checklist in order if time is limited. The first items address life-safety risks, while later tasks improve comfort, efficiency and convenience.
- Test smoke alarms and carbon monoxide alarms, then replace weak batteries.
- Check space heater placement, fireplace readiness and candle safety.
- Replace or clean HVAC filters and clear vents inside and outside the home.
- Disconnect hoses, protect exterior faucets and identify the main water shutoff.
- Seal obvious drafts around doors, windows and attic access points.
- Review backup power plans for essential medical equipment.
- Confirm oxygen safety rules with every household member and frequent visitor if oxygen is used.
- Clear walkways, stairs, exits and caregiver access routes.
- Prepare storm supplies, including flashlights, batteries, medications and device accessories.
- Make a short contact list for utility, medical device supplier, clinician and emergency services.
The best December maintenance plan is the one the household can actually complete. If a task involves fuel-burning equipment, electrical wiring, roof access, gas lines or medical device settings, bring in a qualified professional rather than guessing.
Frequently asked questions
What maintenance should I do first in December?
Start with smoke alarms, carbon monoxide alarms, heating equipment, generator safety, frozen-pipe prevention and any home medical device backup power needs. These tasks address the highest winter safety risks before comfort and cosmetic projects.
How often should furnace filters be changed in winter?
Follow the furnace or filter manufacturer’s instructions. Many homes need filter checks every month during heavy heating use, but the correct replacement schedule depends on the filter type, household dust, pets, occupancy and equipment design.
Is it safe to run a portable generator in the garage if the door is open?
No. Public safety agencies warn that generators should not be used in garages, basements, sheds, crawl spaces or other enclosed or partly enclosed areas. Carbon monoxide can build up quickly and move into living spaces.
How should I prepare home medical equipment for winter outages?
List each device’s power needs, charge batteries, keep instructions nearby, record supplier and clinician phone numbers and ask the utility company whether it has a medical needs notification process. After an outage, verify that device settings have not changed.
Is December too late to winterize a home?
No. Some preventive tasks are best done in fall, but December is still a valuable time to reduce drafts, check alarms, clear vents, protect pipes, review storm supplies and correct hazards that become more serious during winter weather.
