US Patent Application 18367887 Non-invasive Temperature-based Diagnostic Method saves 10 to 20% on cooling energy and reduces refrigerant venting by 50%. NTD software is used in the CPUC-approved SWSV014-01 lifecycle refrigerant management (LRM) program. verified.co/lrm
US 20230059157A1 patent pending Occupancy-based Fan Controller to detect an HVAC fan controlled by at least one fan-on duration control and provide at least one fan-on alarm message prior to overriding and setting fan control to auto. According to the Advanced Research Projects Agency-Energy (ARPA-E) occupancy-based HVAC control is the most cost-effective measure in residential and commercial buildings with potential savings of 30% of HVAC equivalent to 2 to 4% of total annual US energy use across the US power system. greenfan.co/ofc
US Patent US20230160586A1 Ionizer Feedback Control converts high-voltage signals to feedback signals to control excitation signals and generate consistent ion concentrations over a range of electrical signal inputs and uses wireless signals to report and adjust ion concentrations when VOCs are above a threshold.
US Patent 11563310 Bipolar Ionizer with Feedback Control maintains and reports consistent balanced bipolar ion concentrations and zero ozone based on feedback signals, and adjusts ion concentrations when VOCs are above a threshold.
US Patent 11460208 Smart Thermostat Fan Controller adjusts and extends variable fan-off delays based on duration of on and off cycles to increase cooling and heating savings by 10 to 20%% based on Intertek tests. SFC is used in the CPUC-approved SWHC059-01 smart fan controller (SFC) program. greenfan.co/sfc
US Patent 11187425 Thermostat Variable Fan-off Delay algorithms for smart thermostats saves 15% on cooling and heating.
US Patent 11175060 Fan-on Detection and Correction enables occupancy recognition technology to switch fans from “on” to “auto” and save 20% on cooling, fan, and heating energy. greenfan.co/ofc
US Patent 11173226 Balanced Bipolar Ionizer based on Unbalanced High-voltage Output - greenfan® bipolar ionizer certified by CARB and Intertek for zero ozone, Innovative bioanalysis tested to deactivate the SARS-CoV-2 virus within 60 minutes. using only 3 Watts of electric power. greenfan.co/bbi
US Patent 11029061 Economizer Perimeter Gap Sealing - saves 5 to 10% on commercial cooling and heating
US Patent 11029057 Economizer Controller Calibration - saves 5% commercial cooling and 15% heating including perimeter gap sealing
US Patent 11022335 Economizer Cooling Delay Correction - saves 15% on commercial cooling. See 2020 ACEEE Summer Study Smart Economizer for Commercial HVAC Systems
US Patent 10921014 Smart thermostat power control apparatus (efficient common-wire adapter for smart thermostats) saves 0.5 to 2W compared to other adapters or 4 to 17 kWh/yr
US Patent 10859284 Smart Thermostat Power Control Apparatus (2-wire and millivolt adapter for gas furnaces or fireplaces)
US Patent 10712036 Fault Detection Diagnostic Variable Differential Variable Delay Thermostat - saves 15% on residential space cooling and heating. See 2019 EEDAL Smart Efficient Fan Controller with Fault Detection Diagnostics, Jinan, China, 2019
US Patent 10663186 Apparatus and Methods to Determine Economizer Faults - saves 5 to 10% on commercial cooling and heating
US Patent 10533768 Smart Fan Controller (FDD fan-on correction) works with smart thermostats to save 15% on cooling and heating
US Patent 10281938 Method for a Variable Differential Variable Delay Thermostat
US Patent 9995493 Efficient Fan Controller - saves 15% on residential space cooling and heating
US Patent 9797405 Method for Efficient Fan Control for Electric or Gas Furnaces and Heat Pumps in Heating Mode
US Patent 9671125 Fan Controller - FDD fan-on detection and correction, economizer gap sealing, and variable fan-off delay saves 15% on cooling and heating
US Patent 9500386 Fan Controller - saves 15% on residential space cooling and heating
US Patent 9328933 External Thermostat Fan Controller
US Patent 9207007 Method for Calculating Target Temperature Split, Target Superheat, Target Enthalpy, and Energy Efficiency Ratio Improvements for Air Conditioners in Cooling Mode
Reissue US RE49383 E External Thermostat Fan Controller (co-inventor) for cooling fan-off delay based on thermostat air AC Y on and off signals.
US Patent 8763920 External Thermostat Fan Controller (co-inventor)
US Patent 8583384 Method for Calculating Target Temperature Split, Target Superheat, Target Enthalpy, and Energy Efficiency Ratio Improvements for Air Conditioners in Cooling Mode
US Patent 7500376 System and Method for Verifying Proper Refrigerant and Airflow for Air Conditioners and Heat Pumps in Cooling Mode and provides accurate refrigerant undercharge charge recommendations