Action Advice | Published by Action! Heating / Cooling Plumbing
Keep snow and ice from obstructing the combustion-air and exhaust openings serving gas appliances. Make checking those openings part of your winter weather routine, provided they can be viewed and reached safely. A clear sidewalk does not tell you whether a drifting snowbank has covered a vent on another side of the house.
Kansas Gas Service’s severe-weather guidance calls for keeping natural-gas appliance vents clear and using extreme care during snow removal. This is a focused vent-awareness checklist, not a guide to changing furnace piping or repairing combustion equipment.
Identify the openings before snow arrives
Ask your heating service provider to show you which outdoor openings serve your furnace and other fuel-burning appliances. Do not assume every small wall pipe is a furnace vent. Keep a photo or a simple written location note with the equipment manual.
Venting arrangements differ. Some furnaces use exterior intake and exhaust piping; other installations have different combustion-air and chimney arrangements. Lennox advises checking accessible exterior intake and exhaust pipes for obstructions and contacting a qualified professional when they cannot easily be checked.
During a routine visit, ask the technician to record the correct clearance requirements for your specific appliance and termination. There is no single distance in this article that can replace the installation instructions or local requirements.
A practical check after winter weather
- Look from safe footing. Stay on stable ground. Do not climb an icy ladder, roof, snow pile, or other unsafe surface to reach an opening.
- Check the whole opening. Look for drifting snow, plowed piles, ice, or debris at the visible termination. Snow beside the opening can move again as wind or clearing work continues.
- Check where removed snow goes. Keep shoveled or snowblower discharge away from identified vent locations. Tell anyone helping clear the property where those locations are.
- Remove only loose snow that is safely accessible. Work gently around the opening without striking, pulling, or inserting tools into the piping.
- Escalate inaccessible or attached ice. If an obstruction cannot be cleared gently and safely, contact a qualified service provider. Do not chip, cut, heat, or alter the vent.
Kansas Gas Service recommends a broom rather than a shovel when possible to avoid damage. That advice does not make every opening safe to reach. Stop when the footing, height, or condition of the vent makes the task unsafe.
What different findings mean for your next step
| Finding | Next step |
|---|---|
| Loose snow near an accessible, intact opening | Gently clear it from safe ground and keep future snow piles away. |
| Hard ice attached to the pipe or termination | Ask for professional assistance instead of striking or heating it. |
| Cracked, displaced, or disconnected visible piping | Stop using the affected appliance if it is safe to do so and arrange service. |
| A vent that repeatedly becomes blocked | Request an assessment of the installation and surrounding conditions. |
| Gas odor, a CO alarm, or suspected carbon monoxide | Leave immediately and call emergency services from a safe location. |
Treat alarms and gas odors as emergencies
A furnace that stops during a storm might have a vent problem, but shutdown alone does not identify the cause. Do not repeatedly restart it, bypass a switch, remove a vent section, or attempt to make the furnace run despite a suspected obstruction.
Kansas Gas Service recommends leaving immediately and calling 911 when carbon monoxide is suspected. If you smell gas, leave the area without operating electrical equipment and call for emergency help from a safe location. Do not stay inside investigating the furnace or clearing a vent first.
A visual outdoor check cannot establish that combustion and venting are safe. Maintain carbon monoxide alarms according to their manufacturer’s instructions and arrange professional heating inspections. An alarm and a clear-looking opening each have a role; neither replaces a system inspection.
Give everyone a clear winter plan
Use a short note for family members or anyone watching the house: the identified vent locations, who to contact for heating service, and the instruction to leave first if an alarm sounds or gas is suspected. Keep the note accessible without requiring someone to enter a mechanical room.
If snow repeatedly collects at a termination, take a photo from safe ground and explain when it happens. Avoid homemade screens, extensions, covers, or enclosures. Have a professional evaluate a lasting correction using the appliance’s requirements.
Review our heating services in Wichita for routine support. For a non-emergency vent concern or an inspection request, contact Action! Heating / Cooling Plumbing. For suspected gas or carbon monoxide, use the emergency response above first.
Sources and further reading
- Kansas Gas Service: Severe Weather Safety
- Kansas Gas Service: Customer Awareness
- Lennox: Furnace Care and Exterior Vent Checks
How this guide was prepared: Created with AI assistance and checked against the linked public sources on November 6, 2026. This is general homeowner information. Your equipment instructions and an on-site professional assessment determine what applies to your home. Contact us with a question or correction.