Independent directory of Manual J and ACCA-approved load-calculation software for HVAC contractors. Published pricing, tradeoffs, and cited sources. Not consumer AC repair. Not a generic HVAC FSM directory.https://www.loadcalcstack.com/https://www.loadcalcstack.com/guides/what-is-manual-j-acca-approved-software/https://www.loadcalcstack.com/guides/what-is-manual-j-acca-approved-software/Plain-language primer on ACCA Manual J residential load calculations and why contractors check ACCA's approved software list. No invented stats.Tue, 15 Sep 2026 00:00:00 GMThttps://www.loadcalcstack.com/compare/cool-calc-vs-wrightsoft/https://www.loadcalcstack.com/compare/cool-calc-vs-wrightsoft/Side-by-side look at published pricing, platform, and ACCA Manual J positioning for Cool Calc and Wrightsoft RSU. No ranked winner.Tue, 15 Sep 2026 00:00:00 GMThttps://www.loadcalcstack.com/compare/cool-calc-vs-elite-software/https://www.loadcalcstack.com/compare/cool-calc-vs-elite-software/Side-by-side look at published pricing, platform, and ACCA Manual J positioning for Cool Calc and Elite Rhvac. No ranked winner.Tue, 15 Sep 2026 00:00:00 GMThttps://www.loadcalcstack.com/compare/wrightsoft-vs-elite-software/https://www.loadcalcstack.com/compare/wrightsoft-vs-elite-software/Side-by-side look at published pricing, platform, and ACCA Manual J positioning for Wrightsoft RSU and Elite Rhvac. No ranked winner.Thu, 17 Sep 2026 00:00:00 GMThttps://www.loadcalcstack.com/vendors/conduit-tech/https://www.loadcalcstack.com/vendors/conduit-tech/iPad-oriented HVAC load-calc and sales platform listed on ACCA's approved software page. Pricing is not published; you request a quote from the vendor.Tue, 15 Sep 2026 00:00:00 GMThttps://www.loadcalcstack.com/vendors/cool-calc/https://www.loadcalcstack.com/vendors/cool-calc/Web-based Manual J, S, and D design suite with published unlimited subscription pricing and LiDAR scan options.Tue, 15 Sep 2026 00:00:00 GMThttps://www.loadcalcstack.com/vendors/elite-software/https://www.loadcalcstack.com/vendors/elite-software/ACCA-approved Rhvac residential load, duct, and equipment selection software with published desktop and online prices.Tue, 15 Sep 2026 00:00:00 GMThttps://www.loadcalcstack.com/vendors/wrightsoft/https://www.loadcalcstack.com/vendors/wrightsoft/Windows-based Right-Suite Universal (RSU) residential package with published yearly subscription pricing covering Manual J/D and related design modules.Tue, 15 Sep 2026 00:00:00 GMT