1. Optimized for iOS 16 and iPhone 14 2. Updated the PT Chart and RefCharge modules by adding new low-GWP refrigerant: R-454B 3. Updated help

1. Optimized for iOS 15 and iPhone 13 2. Updated user interface elements for individual modules 3. Updated help

1. Updated the app launch screen per new Apple iOS guidelines. 2. Updated Google Analytics and Crashlytics. 3. Updated launch icons

1. Optimized the user interface for iOS 13 and iPhone 11x 2. Fixed the "negative sign" issue that occurs in iOS 13 3. Fixed issue with not displaying properly in iOS 13 "dark mode" 4. Fixed issue with Pipe Sizer modules not displaying full text in selector controls in iOS 13 5. Updated help

1. Added 5 new refrigerants to the PT Chart and Ref Charge modules including R-450A, R-455A, R-452A, R-452B, R-1233ZD, R-245FA (and all dew/bubble versions) 2. Fixed issue with psychrometric altitude to absolute air pressure lookups in metric mode 3. Updated the user interface to accommodate the latest iPhone X* screens 4. Updated help

1. Updated to latest iOS 12 2. Optimized for new iPhone X versions 3. Updated help

1. Optimized for iOS 9 2. Updated HVAC Equipment Locator that includes global search, maintenance event alerts, and much more 3. PT Chart and Ref Charge modules include dew and bubble refrigerant tables. 4. Fixed bug where settings form was crashing in Duct Sizer module 5. Updated help

1. Updated HVAC PT Chart module so includes over 100 different refrigerants along with dew and bubble versions of mixed refrigerants 2. Updated HVAC Refrigerant Charge module so includes over 100 different refrigerants along with dew and bubble versions of refrigerant mixtures. It also automatically assigns the dew version of a mixed refrigerant to superheat and bubble version to subcool 3. Updated the HVAC Equipment Locator module so that the login screen auto-appears for new user

1. Optimized for iOS 8 2. Now a universal app meaning that it works on both the iPhone and iPad 3. Added the HVAC Equipment Locator app 4. Added email capabilities for all pipe sizing functions 5. Updated in-app icons 6. Revised help 7. Fixed outstanding bugs and issues

1. Added P/T Chart for 75+ refrigerants 2. Added refrigerant charge calculator for 75+ refrigerants 3. Add email capabilities to Quick Load, Duct Sizer, Psych, and Steam Tables modules 4. Updated all icons to high-res so looks appropriate for iPhone retina screens 5. Updated launch icon 6. Updated help

1. Added email capabilities to Steam Tables function that allows the user to send an HTML email and spreadsheet attachment that includes all steam properties 2. Fixed a bug in the Steam Tables function that displayed incorrect units for pressure for a certain combination of inputs

Psychrometric Module: 1. Added email capabilities: Now you can email an HTML report and a spreadsheet listing all of the inputs and results for both the single-state and mixed-air psychrometric calculations. 2. Corrected the enthalpy metric conversion calculation (uses a 0 deg. celsius basis versions 0 deg. F basis).

Psychrometric module: 1. The digit separator option now applies to any values greater than 999 such as airflow and elevation (i.e. - if an airflow value for stream 1 is 10,000 CFM and the user of the app is located in Denmark, they can toggle off the "," digit separator so the value displays as 10000 and not 10,000). Steam Tables module: 1. The max allowable superheated steam pressure is now 15,500 psia. Duct Sizer module: 1. In addition to performing simple duct sizing, you can now display a range of duct sizes by specifying minimum and maximum friction loss and airflow values. 2. Includes the ability to specify a maximum aspect ratio for this range of duct sizes 3. You can now email the inputs and results from all 3 duct sizing modes. The email includes html text and also a spreadsheet attachment (.CSV file). Overall: 1. There is now one less screen between the main home screen and the HVAC Quick Load main input form 2. Includes updated help 3. HVAC Toolkit has been confirmed to work on iOS4

1. Added HVAC Quick Load Calculation module. It allows the user to quickly calculate total heating and cooling loads for a wide variety of building types. 2. Includes a setting to toggle the digit group separator (aka - comma separator - "1,000,000"). This is most appropriate for international users who do not use comma digit separators. 3. The user-interface has been slightly updated. Pipe Size - Steam Module: 2. Added "step" value inputs that allows the user to increase/decrease all the parameter inputs by specific values

1. Fixed issue related to some data not saving after closing the app. 2. Fixed issue related to using the slider control for very large values for the duct sizer and pipe sizer liquid modules.

Overall: 1. Updated the Help with correct links to online help for all of the modules. 2. Works with iPod touch - 1st generation Psychrometric Module: 1. Allow minimum temperature input of -80 degrees F. for both single-state and mixed-air calc modes. 2. Allow minimum enthalpy input of -80 BTU/lb for both single-state and mixed-air calc modes. 3. Allow user to specify low- or high-accuracy calculation mode for purposes of speeding up some of the calcs. 4. More accurate calculations for a number of input parameter combinations. 5. Added 3 additional pairs of input parameter combinations so the total is now 23.