What To Do If HVAC Exhaust Smells Like Gas

  • Home
  • Tips
  • What To Do If HVAC Exhaust Smells Like Gas

Is It Normal To Smell Gas When HVAC Is Running?

Residential furnaces that are powered by natural gas are one of the most common types of home heating systems in the area. Sometimes with these systems, there can be a malfunction which may lead to funny smells coming from your vents or around the furnace. Though it is uncommon for the system to produce a gas smell, it is important to know what to do if it happens, as this could be a very serious concern.

Propane (LP) gas:  You have this type if your gas comes from a tank located outside close to your house.  Propane is stored as a liquid under pressure in tanks and cylinders. In most residential applications, propane is used as a vapor. When liquid propane changes into a gas vapor, it expands in volume. This means that even a small leak of liquid propane can result in a much larger quantity of propane vapor, which can be especially dangerous in a confined space. A chemical odorant has been added to propane to give it a distinct smell. Learn to identify this odor. Propane gas is heavier than air, so it will sink to the floor and spread.  To check for the presence of propane, carefully smell all over a room, especially in low spots.

If you smell propane (LP) gas:

  • Exit your home immediately.
  • Propane gas can ignite easily.  Do not light a match, start an engine, use a cell phone, or do anything that may create a spark.
  • From a safe area, contact your propane supplier and call 911.
  • If you are able, shut the propane gas supply off at the tank.
  • Stay away from your home until you’ve been told that it is safe to return.

Natural gas:  You have this type if you have a gas meter and pay a natural gas supplier or utility.  A chemical odorant has been added to natural gas to give it a distinct smell. Learn to identify this odor. If you smell gas faintly, check all areas of your house for strong odor.  If the smell is only faint throughout all areas of your home, call your heating contractor to get it fixed within 24 hours.  Keep the house well ventilated by opening windows.

If you smell a strong, persistent odor:

  • Exit your home immediately.
  • Do not light a match, start an engine, use a cell phone, or do anything that may create a spark.
  • From a safe area, contact your gas company or call 911.
  • If you are able, turn the gas off at the meter.
  • Stay away from your home until you’ve been told that it is safe to return.

Contact Envirotemp Today

If you are noticing unusual issues with your heating system that raises concern, get in touch with us today. Our team of HVAC specialists in Dover can properly diagnose and repair and issue–no matter how big or small. To get started, contact us by phone at 302-653-4073 or request service online.

Request Service


More Articles

AC Repair: DIY vs. Calling A Pro

September 9, 2022
Your air conditioner is an important appliance in your home and should be properly taken care of. While DIY projects …

Ways To Boost AC Efficiency

August 15, 2022
Your cooling system is a large part of your energy bills each month, especially in the summer. Your air conditioner i…

Why Is My AC Freezing Up?

July 14, 2022
Everything You Need To Know If Your Air Conditioner Freezes In The Summer Although many love the summertime, it is ni…

Request Service Today


We aren't comfortable until you are!

Contact Envirotemp today at (302) 653-4073.

Envirotemp Heating, Cooling, and Geothermal is the trusted local leader for HVAC services in the Dover, Clayton, and Smyrna Delaware areas!

Contact Information

Local Office

919 Downs Chapel Rd,
Clayton, DE 19938

Map & Directions [+]

© Envirotemp LLC | All Rights Reserved

HVAC Website Design by Rival Digital