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Enerfit claims 'breakthrough' controls and VFD technology for energy efficient air conditioning retrofit

Variable Frequency Drive system claims energy savings of 50 per cent and significant redution in relative humidity, along with alarm system and real-time unit data. The firm says the system is optimised with the service technician in mind, ‘the missing link in the HVAC payback equation.’

US manufacturer Enerfit has launched what it says is an ‘easily installed retrofit for commercial air conditioning units that cuts annual electric consumption by half or more’. The Enerfit Version 1 Basic (V1B) comes pre-programmed and boasts a radically simplified installation process that can be completed in only one to two hours by the regular installer or AC service contractor. Enerfit V1B also has a comprehensive alarm system that gives field service technicians early warnings about refrigerant pressures and superheat that can take an HVAC system offline if left untreated.

The V1B delivers what Enerfit claims are industry-leading Variable Frequency Drive (VFD) energy savings and introduces EnerTouch, a breakthrough ARM-powered touchpad controller and web server. This technology aggregates building automation and control networks (BACnet) data and makes it available on any browser or mobile device. As a result, service technicians can see real-time unit data on their smart phones and building owners can check the status of their units from any location.

Ron Patch, president of Enerfit said: “Enerfit is committed to addressing the needs of field service technicians, while providing building owners with exceptional – and ongoing - return on investment. Owners save considerable time and expense with the V1B’s simplified installation, real-time data monitoring and seamless integration into building automation systems. Equally important, our technology ensures that on-site technicians can easily understand and accurately use the retrofit, enabling owners to maximise their ROI over the long term. Service technicians are the missing link in the HVAC payback equation and we’ve spent years listening and improving our product based on feedback from the field.”

Enerfit is a retrofit for single-zone commercial air conditioning units that typically cuts annual electrical consumption in half or better, the firm claims, by controlling the evaporator fan speed in response to the operating mode of the unit.  In cooling mode, the fan speed is modulated in response to actual conditions outdoors and in the conditioned space. Enerfit also lowers relative humidity by 15 to 20 per cent on average, a benefit the firm claims is ‘unique among VFD retrofits’. 

Although each Enerfit kit is custom designed for its specific HVAC unit, the V1B features standardised wiring diagrams and programs that reduce the retrofit’s engineering and hardware costs while maintaining high performance standards. Enerfit says it passes those savings directly to customers. 


Enerfit is compatible with all brands of commercial single-zone units, and can be easily installed by a technician with typical HVAC service skills.

For more information, please visit www.enerfit.com.

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