Six Reasons Why You Should Consider a Natural Gas or Propane-Powered Grain Bin Fan Over A Gasoline Fan Engine

When it comes to grain bin aeration and drying, reliability, operating cost, and ease of use matter just as much as airflow. While many producers are familiar with traditional electric fans, there’s growing popularity for fans that can operate without electricity.  We often get asked “Why did you choose propane or natural gas as the fuel source for your Airblast fan?  Why doesn’t Wavcor offer a gasoline-powered fan?”

Reason #1: Cleaner Fuel = Longer Engine Life

Propane and natural gas burn significantly cleaner than gasoline. This means:

• Less carbon buildup inside the engine

• Cleaner oil over time

• Reduced wear on internal components

The result? Longer engine life and fewer maintenance headaches compared to traditional gasoline-powered systems.

Reason #2: Lower Fuel Costs Over Time

Fuel is a major operating expense during harvest season. Compared to gasoline or diesel:

• Propane and natural gas are typically more cost-effective.  This is especially true with the current conditions.

• Price volatility is lower

Using today’s prices (May 25, 2026), running costs to aerate can save $2 or more per hour when using natural gas and more than $1 per hour when using propane.  Over multiple seasons, this can translate into meaningful savings.   The cost savings when drying is even more significant -  saving you more than $7 per hour when using natural gas and over $3 per hour when using propane.

Reason #3: Less Maintenance After Storage

Grain bin fans are typically used heavily in the fall—and then sit idle through winter.

With gasoline systems, that creates familiar problems:

• Stale fuel

• Gummed-up carburetors

• Hard starts in spring

With propane or natural gas you can benefit from:

• No stale fuel issues

• No carburetor cleaning

• Cleaner oil even after long storage periods

In short, less prep work and fewer surprises when you need the fan again.

Reason #4: Long Run Times Without Interruption

Aeration often requires extended run times to properly cool grain.  Gas-powered systems rely on onboard fuel tanks with limited capacity. For example, some units are designed to run for up to 50 hours on approximately a 130 litre tank.

With propane or natural gas:

• You can connect to larger external tanks

• Run times can be extended significantly

• Fewer refueling interruptions

• No tank needs to be refilled directly on the Airblast fan.  The fan can be connected directly to a constant natural gas supply or to a large propane tank that only require periodic refills.

This gives operators more flexibility and less downtime during critical periods.  It is also beneficial for remote bin sites that are long distances and harder to reach when refueling.

Reason #5: Free Heat for Improved Efficiency

An often-overlooked advantage of the Airblast fan is that it is designed to use heat from the motor to dry grain.  The Airblast fan has a heat exchanger that, when in Drying Mode, will use the heat from the engine to add up to 10 degrees Celsius to the incoming air stream.  This added warmth can provide a small but valuable performance boost when dealing with moist grain.

Reason #6: Better Cold Weather Performance

Fall harvest conditions can be unpredictable, especially across the Prairies. Propane and natural gas engines offer:

• More reliable cold starts

• Better performance in low temperatures

• Improved compatibility with remote start setups

Gasoline-powered fans rely on carbureted engines, which can struggle in cold weather and are less reliable for remote operation.

The Bottom Line

Choosing the right aeration fan isn’t just about airflow—it’s about reliability, efficiency, and long-term cost.

Wavcor’s Airblast fan stands out by offering:

• Cleaner operation and longer engine life

• Lower fuel costs

• Minimal maintenance after storage

• Extended run times

• Improved cold-weather reliability

• Added performance from engine heat

For producers looking to add an alternative to electric fans to their operation, fuel choice is a big part of the equation—and it’s one worth considering carefully.

NOTES:

-       Prices quoted in CAD. 

-       Prices valid on May 25, 2026.