HVAC Drives

HVAC Drives, VFDs & Variable Frequency Drives

HVAC drives, also called VFDs or variable frequency drives, help control the speed and operation of motors used in heating, cooling, ventilation, refrigeration, and commercial HVAC systems. These drives are commonly used with fans, pumps, blowers, compressors, air handling units, condenser units, packaged systems, and other equipment where motor speed control is needed.

Furnace Part Source carries HVAC variable frequency drives, inverter drives, motor drives, drive boards, control drive assemblies, and related drive components for a range of residential, light-commercial, and commercial HVAC applications. Because drive compatibility depends on electrical ratings and equipment requirements, always match the part number, voltage, horsepower, phase, enclosure rating, and control function before ordering.

Common HVAC Drive Products We Carry

Common HVAC drive and VFD products in this category include:

• Variable frequency drives for controlling motor speed in HVAC fans, pumps, blowers, and compressor applications.
• HVAC VFD drives for air handling units, rooftop units, condenser systems, ventilation equipment, and commercial HVAC systems.
• Inverter drives for select air conditioning, heat pump, and variable-speed HVAC equipment.
• Motor drives for heating and cooling systems that require controlled motor operation instead of simple on/off cycling.
• Drive boards and control boards for equipment that uses electronic motor control or variable-speed operation.
• Compact HVAC drives for smaller motor applications where space, voltage, horsepower, and wiring layout must be matched carefully.
• Replacement VFDs for brand-specific equipment from manufacturers such as ABB, Danfoss, Yaskawa, Trane, York, Carrier, Mitsubishi Electric, Schneider Electric, Rheem-Ruud, and others.

What Does a VFD Do in an HVAC System?

A VFD, or variable frequency drive, controls the speed of an electric motor by adjusting the frequency and voltage supplied to the motor. In HVAC systems, this can help equipment ramp up or slow down based on demand instead of running at one fixed speed.

HVAC VFDs are often used to control fan motors, pump motors, blower motors, air handler motors, condenser fan motors, and some compressor applications. When correctly matched to the system, a drive can help support smoother motor operation, better airflow control, reduced mechanical stress, and more efficient system performance.

How to Choose the Right HVAC Drive or VFD

The best way to choose a replacement HVAC drive is to match the existing drive, motor, and equipment specifications as closely as possible. A VFD that has the correct horsepower but the wrong voltage, phase, enclosure rating, control input, or programming requirements may not work correctly with the system.

Before ordering, compare:

• Manufacturer name and part number
• Existing VFD model number or replacement number
• Equipment model number and serial number
• Motor horsepower rating
• Input voltage and output voltage
• Single-phase or three-phase requirements
• Rated amperage and frequency range
• Enclosure type, such as NEMA-rated or indoor cabinet-mounted designs
• Control method, communication requirements, and wiring terminals
• Application type, such as fan, pump, blower, compressor, air handler, or condenser unit

If the original drive has been replaced before, compare both the installed drive and the equipment data plate. The drive currently installed in the system may not always be the original factory component.

HVAC VFD Cost and Drive Pricing

HVAC VFD cost depends on the brand, horsepower, voltage, phase, enclosure type, drive series, control features, and current availability. A small compact drive may cost much less than a larger 10 HP, 15 HP, or 20 HP HVAC variable frequency drive used in commercial equipment.

If you are comparing VFD drive prices, make sure you are comparing drives with the same electrical ratings and application requirements. Price alone is not enough to choose the correct drive. The replacement must match the motor, system type, wiring configuration, and control function. Check each product listing for the current HVAC drive price, specifications, availability, and shipping options.

HVAC Drive vs. VFD vs. Inverter Drive

Many shoppers use different names for the same general type of product. HVAC drive, HVAC VFD, variable frequency drive, variable speed drive, inverter drive, AC drive, and motor drive may all refer to equipment used to control motor speed in an HVAC system.

These terms can overlap, but the correct replacement depends on the exact part number, electrical rating, control function, and equipment application. Always use the manufacturer part number, equipment documentation, or approved cross-reference instead of relying on the name alone.

Brands and HVAC Drives Available

Furnace Part Source carries HVAC drives and VFD products from many manufacturers. Available products may include ABB variable frequency drives, Danfoss VLT HVAC drives, Yaskawa HVAC drives, Trane variable frequency drives, York drives, Schneider Electric VFDs, Mitsubishi Electric inverter boards, Carrier VFD motor components, Rheem-Ruud drives, Friedrich drive boards, TECO-Westinghouse drives, and other replacement drive products.

Brand name alone is not enough to confirm compatibility. Many manufacturers offer multiple drive series with different horsepower, voltage, phase, enclosure, and control requirements. Search by the exact part number, model number, or replacement number whenever possible.

Need Help Finding the Right HVAC Drive?

Not sure which HVAC drive, VFD, or variable frequency drive you need? Gather the existing drive part number, manufacturer name, equipment model number, motor horsepower, voltage, phase, amperage, and photos of the drive label or equipment data plate. These details can help narrow the product list and reduce the risk of ordering a drive that does not match your system.

If the original drive is damaged, discontinued, or difficult to identify, contact Furnace Part Source for help searching for a compatible replacement. This is especially helpful when comparing HVAC drives, VFD drives, inverter drives, AC drives, and motor drives with similar names but different electrical and control requirements.

HVAC Drives FAQs