Access product information and tools for /R professionals. View real-time order status. Use a duct calculator to determine size, material, and specifications. Link online account to manage prices, add items to cart, and check inventory.
by Watsco, Inc.★ 4.9594 ratingsProductivityFreeData updated 2026-09-08
Calculate fault current for electricians instantly.
The app calculates prospective fault current, prospective short-circuit current, and prospective earth fault current. It supports single-phase and three-phase systems and works offline.
The app performs detailed heating and cooling load calculations for residential buildings. It includes a weather database and data for construction types.
Calculate service demand loads compliant with NEC 220.42–220.82. Use Standard or Optional methods. Add dryers, ranges, fixed appliances, HVAC, and motors. Automatically determine largest heat or cool load.
