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Wireless Pneumatic Thermostat


“Go from Pneumatic to DDC in 20 minutes” Traditional pneumatic thermostats are manual devices which do not allow for remote readings, diagnostics, or setpoint control. This means costly maintenance, wasted energy, and hot/cold calls by uncomfortable occupants.

Traditionally, these problems could only be overcome by replacing the system with a new Direct Digital Control (DDC) system, a time-consuming process which disturbs occupants and costs $2,000 – $3,000 per thermostat zone.

Cypress Envirosystems’ patented Wireless Pneumatic Thermostat (WPT) offers virtually the same functionality as traditional rip-and-replace DDC thermostats but can be installed in as little as 20 minutes for a fraction of the cost. The WPT can operate as a standalone system or can integrate with existing building automation systems via BACnet/IP (e.g. Siemens, Honeywell, Johnson Controls, and Schneider) .
  • 2-3 year payback
  • 20-30% energy savings
  • Easier and faster maintenance
  • Improved occupant comfort
  • 20-60% fewer hot/cold calls
  • LEED points
  • Auto-demand response and energy efficiency utility incentives
Key Features and Control Strategies
  • System components and architecture
  • Replaces any legacy pneumatic thermostat, e.g. two pipe, single pipe, direct acting, reverse acting, summer/winter, etc.
  • Optional deadband capabilities (separate heating and cooling setpoints)
  • Optional relative humidity (RH) sensor
  • Remote wireless setpoint control
  • Trend data to enable automated diagnostics through SMARTPneumatics
  • Alarm notification of excursions
  • Automatic self-calibration
  • Programmable temperature setbacks (occupied/unoccupied) with occupancy override
  • Optimal start/stop
  • Supply air temperature reset
  • Duct static pressure reset
  • Pre-cooling
  • Auto-demand response
  • BACnet/IP interface for integration with Building Management Systems
  • 4-5 years of battery life

The WPT has been deployed in hundreds of facilities and has been repeatedly recognized by industry thought leaders.

WPT Case Studies    l    WPT Video Testimonials    l    WPT Clients    l   WPT Awards



Actual Pneumatic-to-DDC Retrofit in Under 10 Minutes

(It’s not just a slogan!)

Actual WPT Retrofit in Fast Motion (video is 84 seconds)


Quality and Reliability

Cypress Envirosystems takes great pride in offering high-quality products. From the beginning, we have integrated the design and manufacturing processes from our parent company, Cypress Semiconductor, which is a world leader in quality and reliability.  However, for systems to perform as designed, it is essential that they are installed by trained technicians.  To ensure a high-quality installation, our partners are required to complete our Certified Integrator training program.  Before you begin your project, make sure your integrator has completed this program and is certified by Cypress Envirosystems.

To take full advantage of the WPT system, be sure to read the training manuals that are posted below.  Also note, it is critical that clean, dry, oil-free air is maintained at all times to avoid damaging the WPT and other components that utilize your pneumatic infrastructure.

Product Briefs

Wireless Pneumatic Thermostat
Wireless Pneumatic Thermostat with Humidity Sensor
Deadband Wireless Pneumatic Thermostat
Summer/Winter Wireless Pneumatic Thermostat
Green Box Controller
USB Wireless Hub
Wireless 24VAC Powered Repeater  (optional 110V power supply for repeater)

Additional Information

Instructions for building occupants:

Wireless Pneumatic Thermostat BACnet Gateway PICS
Deadband Wireless Pneumatic Thermostat Overview



WSTM Payback Calculator2 (years)

WSTM Installed Cost3:
$1000 per unit

Your Steam Cost:
per 1,000 lbs.

Inspection Frequency4:

Inspection Costs5:
per trap

Facility Uptime:

Failure Rate6:
per year

1. Orifice diameter should not be confused with pipe diameter. Consult the steam trap manufacturer if orifice size is not known.
2. Calculations are theoretical estimates and actual results will vary. Payback calculation includes avoided lost steam and inspection labor. Benefits from avoided damage resulting from blocked traps are not included in model. The formula used for steam loss in this model is: L=24.24*Pa*D2. Where L=pounds/hour, Pa=Pgauge + Patm , D=orifice diameter.
3. Actual WSTM installed cost will vary based on volume and integrator.
4. Refers to the manual inspections of steam traps that are currently being done at the facility. The frequency determines the potential avoided failure time when using the WSTM.
5. The frequency and cost of inspection determine the labor savings enabled by the WSTM.
6. The failure rate per year should be based on historical data from the facility. 15-20% failure rates per year are typical. In unmaintained facilities, the failure rate can be much higher: