FW: EPA Climate Control 2.0

["Toby Considine" <Toby.Considine@gmail.com>]

The EPA Climate Control 2.0 specification, slated for publication this fall, covers requirements for what data needs to be communicated on the HAN, and how, in order to get the Energy Star label.

 

The specification itself is not long or complex. The relevant communications requirements start in Line 577:

Communication Requirements:

20. A Software Development Kit, or Interface Control Document, as appropriate, shall be available to 3rd party developers to enable access to the product’s full range of communication and remote control capabilities.

 

21. The product shall facilitate secure communications, including:

·         Basic authentication and authorization so that only authorized devices or software applications can access the product.

·         Security measures to protect against unauthorized access.

 

22. The product shall be capable of collecting and transmitting the following thermostat settings and data points on a periodic basis to connected devices external to the HVAC system. The product must be capable of recording data at least once every 60 seconds and transmitting data at least once every 5 minutes.

·         Unique Thermostat ID

·         Room Temperature in °F or °C (0.1 °F resolution)

·         Active Cool and Heat setpoints in °F or °C

·         HVAC mode setting (off, Heat, Cool, auto)

·         Active HVAC mode (off, Heat, Cool)

·         Fan mode setting (off, on, auto)

·         Active Fan mode (off, on)

·         Current Hold mode type and state (e.g. Long Term – on)

·         Current Away mode status (on, off)

·         All Programmable settings, including program schedules & setpoints, hold modes, fan modes, HVAC modes and installer settings.

·         Current Humidity reading and control mode

 

23. The product shall be capable of accepting remote control commands from authorized devices or software applications to enable near-real time (within roughly 5 seconds) settings changes to the following, at any point of time:

·         Time synchronization

·         Active Cool and Heat setpoints in °F or °C

·         HVAC mode (off, Heat, Cool, auto)

·         Fan mode (off, on, auto)

·         Select hold mode type and status (e.g. Long Term – on)

·         Select away mode status (on, off)

·         Control (green, yellow, red) energy tier indicators

·         All program schedule settings including times and setpoints for active and inactive schedules

·         Select active program schedule

 

 

The spec is available at:

http://www.energystar.gov/ia/partners/prod_development/new_specs/downloads/climate_controls/Draft2_CC_spec_FINAL.pdf