Duct Sizing Calculator — HVAC Round & Rectangular Duct Size by CFM
ductsizingcalculator.com
LaunchIndex first observed Duct Sizing Calculator — HVAC Round & Rectangular Duct Size by CFM (ductsizingcalculator.com) live on 28 August 2026. View its launch screenshot, category, technologies, and verification evidence.
A launch record built from evidence.
Duct Sizing Calculator — HVAC Round & Rectangular Duct Size by CFM (ductsizingcalculator.com) was first observed live on 28 August 2026.
Free HVAC duct sizing calculator that determines round or rectangular duct sizes from airflow using the equal-friction method; an online tool for estimating ductwork sizes with instant results.
Its profile is classified as Developer tool within Technology / Developer tools. Verification detected Google Analytics.
What the launch signal contained.
- First observed live
- Previous state
- No prior non-live observation
- Last verified
- Canonical host
- ductsizingcalculator.com
- Category
- Technology / Developer tools
- Website type
- Developer tool
- Observed title
- Duct Sizing Calculator — HVAC Round & Rectangular Duct Size by CFM
- Observed description
- Free HVAC duct sizing calculator. Enter airflow (CFM) and get the round duct size, air velocity and equivalent rectangular duct — using the equal-friction method. Fast, accurate, no sign-up.
- Detected technologies
- Google Analytics
- Screenshot captured
- Evidence source
- Browser observation · Local
- Evidence confidence
- 93%
- HTTP status
- 200
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