DC Motor Technology

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High Efficiency Brushless DC Motor

Brushless DC motor
DC motor technology


Delta’s brushless DC motor fans are engineered to outlast popular AC motor models by as much as 70 percent, reducing the need for replacement.

Less noise

Delta’s brushless DC motor fans are precision engineered for low sound, down to less than 0.3 Sones, the lowest sound rating of any exhaust fan.

Less power consumption

Delta’s brushless DC motor fans use up to 74% less power than popular AC motor exhaust fans.


Delta brushless DC motor fans are among the most efficient ventilation fans available, exceeding ENERGY STAR requirements for efficiency by as much as 367%.

All Delta Breez ventilation fans are precision engineered to run continuously for a minimum 70,000 hours.

Design & Analysis

design and analytics
  • Delta's design and analysis technology utilizes 3D and 2D tools to conduct thorough examination during the design and production phases. Software simulations to enable the highest standards of performance include: Molding Analysis, Structure Analysis, Flow Analysis and CFD.

Reliability & Testing

Reliability and  Testing

Laboratory testing of Delta ventilation products analyzes functionality, durability under harsh conditions, and construction for long life. The Basic Function Test checks current, speed and noise, while the Safety Test includes leakage current, Hipot (high potential), ground bond and insulation testing. Comprehensive reliability testing continues with:

  • Low Temperature and High Temp/Rating Voltage on/off Test
  • Temperature Cycling & Power Switching
  • Impeller Locked Test
  • Thermal Shock
  • Humidity Exposure
  • Water Spray
  • Random Vibration and Drop (packing)
  • Operational and Non-operation Vibration
  • Mechanical Shock
  • Life Test