Variable Frequency Drives

Make Your Building Smarter, More Efficient, and Quieter with a VFD

Why VFDs Matter:

Variable Frequency Drives are one of the simplest ways to make your building smarter, quieter, and more efficient. Instead of forcing motors to run at full speed all the time, VFDs let them adjust to real demand—cutting energy use, extending equipment life, and keeping occupants comfortable.

Applications in the Field:

  • Air Handling Units (AHUs) – Control fan speed based on static pressure or airflow demand.
  • Pumping Systems – Adjust water flow to actual building load, eliminating bypass energy waste.
  • Cooling Towers – Maintain efficiency by modulating fan speed with load and outdoor conditions.
  • Exhaust Fans – Quiet, efficient operation that responds to real occupancy levels.
VFD Selection Help

Enhancing HVAC Performance

Variable Frequency Drives (VFDs) are essential in high-performance HVAC systems.

Why it matters: By adjusting motor speed to match demand, VFDs lower energy use, extend equipment life, and boost occupant comfort.

For contractors, VFDs offer a cost-saving solution and help ensure projects perform as designed.

Benefits of Using a VFD:

  • Energy savings: Customers see measurable reductions in utility bills, making VFDs an easy sell with strong ROI.
  • Flexibility: One drive can serve multiple motor applications—fans, pumps, towers—allowing standardization across projects.
  • Reduced maintenance: Smooth starts and stops reduce belt wear, bearing stress, and nuisance trips.
  • Better control: VFDs integrate seamlessly with BAS platforms via BACnet, Modbus, or simple analog signals.
Variable Frequency Drive

Why Stromquist for Your VFDs?

  • Top brands represented: We partner with trusted manufacturers to offer a complete range of drives.
  • Selection & sizing expertise: Provide motor horsepower, voltage, and application details—we’ll size and specify the correct unit.
  • Integration support: Our team ensures drives communicate with BAS platforms and match project requirements.
  • Competitive pricing: As a wholesale distributor, we deliver the right drive at the best available price.
  • Technical support: From pre-bid design to field startup, Stromquist is a partner you can count on.

Key information we need for selection:

When requesting a drive, customers should be ready with:

  • Motor HP and voltage (e.g., 460V, 3-phase)
  • Application type (fan, pump, tower, etc.)
  • Environmental conditions (indoor, outdoor, dusty, wet, NEMA?)
  • Control type (BAS integration, analog, or standalone)
  • Any special requirements? (bypass, disconnect, filters)


Bottom Line: Variable Frequency Drives are no longer optional—they’re an expectation in modern HVAC projects. With Stromquist’s expertise, contractors can be confident they’re providing the right drive for every application, delivered on time, and supported by a team that understands the field.