Engineering tools for the built environment

HVAC Design
Engineering Resources.

Practical tools and references for engineers who design comfortable, efficient, and resilient buildings.

Explore resources
Refrigeration cycle diagram with compressor, condenser, expansion valve, and evaporator

01 / RESOURCES

Tools for better
design decisions.

Built from real engineering workflows, with an emphasis on clarity and usefulness.

01
Psychrometric chart showing room, supply, and outside air conditions

Live tool

Interactive
Psychrometric Chart

Plot air conditions, read psychrometric properties, connect state points, and calculate sensible, latent, and total capacity.

Launch tool

MORE RESOURCES IN DEVELOPMENT

02

A2L Refrigerant Charge Calculations

Coming soon

03

Reference Library

Coming soon

02 / ABOUT

Engineering knowledge,
made useful.

This growing collection is created by Omar Rojas to make everyday HVAC design work faster, clearer, and more accessible.