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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 
  • 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
  • Automatic self-calibration
  • Remote wireless setpoint control
  • Trend data
  • Alarm notification of excursions
  • BACnet/IP interface for integration with Building Management Systems
  • 4-5 years of battery life

HVAC Control Strategies Enabled by the WPT System

  • Programmable temperature setbacks (occupied/unoccupied) with occupancy override
  • Setpoint strategy:
    • Zone-level resets
    • Programmable limits (i.e. specified range for occupant control)
    • Deadband setpoint control (i.e. separate heating and cooling setpoints)
  • Automated diagnostics for ongoing commissioning through SMARTPneumatics
  • Optimal start/stop
  • Supply air temperature reset
  • Duct static pressure reset
  • Pre-cooling
  • Auto-demand response

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)

 Product Briefs/Submittals

 Instructions for Building Occupants

Installation and O&M Manuals 

Note that the materials below do not contain passwords. If you need passwords, please contact Cypress Envirosystems at

How-To Videos

Installing the WPT

General Overview (narrated by Tony Raimondo)

Run the One Click Commissioning Tool (GBC Admin Tool)

Backup Database with Admin Tool

Download Daily Performance Log for SMARTPneumatics

Setting Up Schedules in Green Box Controller

Calibrating the WPT

Calibrating the Summer/Winter Wireless Pneumatic Thermostat

Stored WPT Calibration Point

WPT Diagnostic Menu

Occupancy Override

Force Discover Command


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: