

Johnstone Supply Toolkit is a free HVAC mobile application.

HVAC Duct Sizer is a duct sizing app developed for iOS.

iDMM P/T Calcs is a refrigerant charge calculator designed to allow HVAC/R technicians to perform superheat and subcool calculations with ease.

HVAC Pipe Sizer Steam is an application designed to allow users to quickly size a simple steam pipe system by inputting a number of piping and steam properties.

HVAC ResLoad-J app is an ACCA-approved HVAC cooling and heating load calculation app for iPad.

HVAC PT Chart is a free app designed to allow users to easily view the pressure-temperature properties of 100+ refrigerants.

HVAC Pipe Sizer Gas Low is an application designed to allow users to quickly size a simple low pressure (< 1.5psi) gas piping system by inputting a number of piping and gas properties.

HVAC Pipe Sizer Gas High application is designed to allow users to quickly size a simple high pressure (>= 1.5psi) gas piping system by inputting a number of piping and gas properties.

HVAC ResLoad-J is an ACCA-approved HVAC cooling and heating load calculation app for iPad.



Carmel Software offers specialized software solutions focused primarily on the HVAC (Heating, Ventilating, and Air Conditioning) industry. Their products are designed to enhance the efficiency and effectiveness of HVAC system design, analysis, and maintenance. Carmel Software provides a range of tools that cater to both professionals and educational institutions within the HVAC sector. Their software solutions include applications for load calculations, duct sizing, refrigeration, and energy audits, among others. These tools are developed to help users comply with industry standards, optimize system performance, and reduce energy consumption, contributing to more sustainable environmental practices.