Research Project Information

Research Project Summary Information

Wireless RF Thermostat for PTAC Control(ST6803-1)

Enernet Corporation


Packaged Terminal Air Conditioners (PTAC), commonly used in hotel and motel rooms, are self contained electric powered heating and cooling systems that use simple bimetallic, line voltage thermostat controls that are imprecise by design and difficult to adjust. This results in poor occupant comfort and excess energy usage. The typical retrofit for improving the control of the PTAC unit is the use of a remotely located electronic thermostat. Unfortunately, such modifications requires installing wire mold chases along floor boards and around doors to achieve electrical hard wiring from a wall-mounted thermostat to the PTAC unit. This activity is labor intensive, aesthetically undesirable, and expensive. Typical retrofit costs are about $500.00 per hotel room. Enernet, Inc. is adapting its battery operated wall-mounted wireless thermostat to be factory integrated with PTAC controls that address the shortcomings of conventional products in this application.

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Project Description

The project will adapt the existing wireless thermostat system for integration into PTAC units manufactured by Coldpoint Corporation (Rome, New York), and scheduled for installation in a Radisson Hotel in Boston, Massachusetts. The performance of the units will be evaluated against other PTAC units without the wireless thermostat system, and a survey of occupant perceptions and comfort will be conducted. ENERNET will then develop a marketing strategy and incorporate it into its existing commercialization program.


The wireless thermostat system will improve precision of temperature control and is estimated to reduce electricity usage by about 18%. The wireless capability will enable a network gateway for each guest room, available by management to remotely control temperature settings and lighting, particularly during times when the room is unoccupied.

Project Results

The project resulted in a first generation wireless control system and thermostat. Subsequent development projects were initiated and the product has now been fully commercialized and is available. The Contractor has begun paying recoupment to NYSERDA for the sales to date.


Enernet Corporation
307 Dewittshire Road
Dewitt, NY 13214

Principle Investigator

Brad Hesse

Universities Involved


Project Type:

Product Development

Technologies Types:

Building Systems

NYSERDA Contact Information

Bryan Berry


R&D - Innovation & Biz Dev

Contract Details

Start Date: 1/11/2010
Project Status: Active
Contract Number: ST6803-1

Last Updated: 11/14/2014