HVAC engineering, made clearer
Make the next HVAC decision with confidence.
A focused workspace for practical calculations, technical references, and the context needed to use them well.
Tool-first
Engineering context
Clear decisions
Start where the work starts
One hub. Four useful paths.
Each path connects practical work with supporting technical context.
A practical workflow
From question to informed next step.
- 01
Frame the input
Start with known conditions, units, and intended outcome.
- 02
Use the right tool
Apply a focused calculator or lookup to the specific task.
- 03
Check the context
Use references and guides to validate assumptions and constraints.
Latest updates
Recently strengthened tools
Listed by the latest maintained update date.
Duct Friction Loss Calculator
Check transparent straight-duct friction inputs.
2026-07-20Duct Cross-Sectional Area
Calculate round or rectangular face area.
2026-07-20Duct Velocity Calculator
Check round and rectangular face velocity.
2026-07-20CFM Calculator
Convert room volume and a documented ACH basis to CFM.
Duct design
Duct design tools
Preliminary airflow, area, velocity, geometry, and friction checks.
Duct Size Calculator
Estimate a round duct diameter from CFM and velocity.
2026-07-20Rectangular Duct Size
Calculate preliminary width and height.
2026-07-20Equivalent Diameter
Compare rectangular and round equal-friction geometry.
2026-07-16How to Size HVAC Ductwork
Use airflow, area, velocity, and pressure checks together.
Load calculation
HVAC load planning
Documented component inputs and transparent preliminary results.
HVAC Load Calculator
Aggregate preliminary cooling and heating load components.
2026-07-16How to Calculate HVAC Load
Know what a detailed load method includes.
2026-07-16Manual J vs Rule of Thumb
Separate planning estimates from design procedures.
2026-07-16Load Calculation Review
Catch omitted inputs and unsupported sizing shortcuts.
Refrigeration
Measured refrigeration checks
Use documented state points and measured temperatures before making any equipment or service decision.
Built for practical work
Explore the HVAC workspace.
Find tools, references, comparisons, and guides from one clear starting point.
