MEP Design

Web-based Manual J/S/D HVAC load-calculation tool with LiDAR floor-plan scanning, satellite trace input, and cross-device access -- pay per project or by monthly subscription.

The most solo-accessible entry point for HVAC load calcs -- $45 per project means zero annual commitment, and LiDAR scanning from an iPhone turns a site visit into a ready-to-calc floor plan.

Commercial HVAC system sizing and hourly energy analysis tool covering 8,760-hour annual simulation, 7,400+ weather stations, and LEED compliance reporting for rooftops, VRF, chillers, and heat pumps.

The most credible commercial HVAC analysis tool for a solo engineer at $1,995 one-time -- government-authorized, ASHRAE Heat Balance method, and 60-day free trial let you validate before committing.

Cloud-based mechanical and plumbing design platform that calculates pipe sizing, heat load, duct sizing, and drainage in real time as you draw, with AutoCAD and Revit integration.

The highest-rated MEP design platform on Capterra (4.8/5 from 55 reviews) and the only tool that auto-calculates as you draw -- worth the sales call to price out, but opaque pricing caps value at 2 for solo planning.

ACCA-certified HVAC load-calculation platform covering Manual J, S, D, and N with a drag-and-drop drawing interface, mobile app, and energy compliance add-ons for residential and commercial projects.

The most complete ACCA-certified residential HVAC suite at $900/year -- one license covers desktop and laptop, and the mobile app for field sizing rounds out a genuinely solo-friendly package.

Windows desktop HVAC load-calculation suite covering Manual J residential and light-commercial loads, Manual S equipment selection, and Manual D duct sizing -- with optional cloud access via Rhvac Online.

A proven one-time-purchase HVAC calc workhorse at $599 -- the perpetual license and ACCA Manual J depth make it the most cost-effective choice for a solo engineer doing repeat residential and light-commercial projects.