What is a VFD?
A VFD, or Variable Frequency Drive is a controller that is attached to a motor, fan, or pump. Its primary service to to vary the frequency voltage supplied to the equipment in which it is installed This modulates the output of your equipment ramping it up or down as it is needed throughout the day. For example, many pumps operate at 100% for 24 hours a day, while the demand is simply not there as many occupants are out of their homes and not using appliances.
Booster pumps are an excellent example, as they deliver water throughout a facility all day long. In many cases, the VFD will be programmed to speak with the pump, essentially telling it to operate at full output at certain hours of the day (i.e. between 6am-10am and from 4pm-11pm) when most occupants are home, taking showers and using their sinks.
How will it help me save money?
Installing a VFD will help you save money in two different ways. The first is simply that your equipment will not be running as long, less run time = less kWh consumed = a reduction in your utility bill. The second way a VFD will help you save money is by prolonging the lifespan of your equipment, you will be saving on maintenance as well as eventual replacement of your equipment. The typical payback for a VFD installation is around 2.5 years although we have had many cases where they are as low at 8 months. Don’t forget about the government incentive! Many utility companies will offer a rebate for installing VFDs which will drastically improve your ROI.
We hope this helps many of the property managers and building owners out there make what could be a very simple decision to drastically reduce the cost of operating.