How Much Electricity Can a Drag Conveyor Save Compared to Pneumatic Dust Transfer?
Energy savings and payback for replacing pneumatic dust transfer fans
Many woodworking factories, panel processing plants, and workshops use pneumatic systems to transfer dust and chips. These systems rely on high-power transfer fans that run continuously whenever extraction is operating.
In some situations, replacing pneumatic transfer with a drag conveyor can significantly reduce electricity consumption. This article explores the electricity and payback impact of replacing an 18.5 kW pneumatic transfer fan with a 2.2 kW drag conveyor.
Tool Inputs
Sliders are tuned for realistic woodworking-site ranges. Hours snap near 40h, 80h, and 168h to make shift scenarios quick to test.
Engineering Assumptions
Pneumatic transfer fan
18.5 kW
Drag conveyor motor
2.2 kW
Power reduction
16.3 kW
Capital cost range
GBP 32,000 to GBP 42,000
These assumptions are editable so you can test different installed powers and quote ranges.
Why Pneumatic Transfer Uses More Energy
Pneumatic transfer depends on moving large air volumes through ducting and separators, which requires high fan power and continuous airflow. Mechanical conveying systems like drag conveyors move the same dust stream with lower installed motor power.
Electricity Savings
The direct electrical reduction is 16.3 kW. The total energy and cost savings scale with weekly operating hours and your site electricity tariff.
Detailed cost exposure and ROI figures are available to signed-in distributor accounts.
Electricity saved per week
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Annual electricity saving (kWh)
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Annual electricity saving (GBP)
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Estimated payback range
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Return on Investment
Electricity savings alone can pay back a conveyor upgrade quickly, especially for longer operating schedules and higher electricity prices.
Example at 25 p/kWh and 80 hours/week: annual electricity saving = 16.3 x 80 x 52 = 67,808 kWh, annual cost saving = 67,808 x GBP0.25 = GBP16,952, estimated payback = GBP32,000 / GBP16,952 = 1.9 years.
ROI chart note: the shaded investment band shows quote uncertainty between your low and high capital-cost estimates.
Interpretation Notes
Actual electricity savings depend on real motor loading, operating hours, control systems, and electricity tariffs. This calculator provides an indicative estimate based on typical installed motor ratings.
Planning a Dust Transfer Upgrade?
Ranheat can help evaluate dust handling options, expected operating savings, and practical implementation pathways for woodworking factories.