Airflow CFM Calc HVAC

HVAC Airflow CFM Calculator helps HVAC technicians, engineers, and contractors calculate cubic feet per minute (CFM) airflow with four methods for cross-checking and verification. This air conditioning calculator eliminates guesswork in ductwork design and system diagnostics. CALCULATION METHODS: Temperature Delta Method - CFM from BTU load and supply/return temperature difference Duct Velocity Method - CFM from duct size (round or rectangular) and air velocity (FPM) Sensible Heat Method - CFM from sensible cooling/heating capacity and temperature delta Total Heat Method - CFM from total heat load and enthalpy difference CORE FEATURES: Round & Rectangular Duct Support - Both duct shapes in velocity calculations Cross-Check Verification - Use multiple CFM methods to validate calculations Instant Results - Airflow, velocity, and duct area displayed in real-time 100% Offline Operation - No internet connection required for field calculations English & Spanish Support - Bilingual interface for diverse crews OPTIONAL PRO UPGRADE — $2.99 ONE-TIME IN-APP PURCHASE The following features require a separate one-time in-app purchase. They are not required to use the calculator: • Unlimited saved calculation history • PDF export of results • Dark theme • Ad-free experience WHY HVAC TECHNICIANS CHOOSE THIS APP: Faster load calculations during service calls and installations Accurate CFM verification for system balance and air quality Quick cross-check methods prevent installation errors Works offline on job sites without cellular coverage Replaces bulky slide rules and reference charts PERFECT FOR: HVAC technicians on air conditioning service calls HVAC field technicians performing system diagnostics HVAC apprentices learning proper calculation methods AC contractors bidding residential and commercial work Building maintenance engineers commissioning systems HVAC students preparing for EPA 608 certification Part of HVACTools Suite - the professional HVAC technician app collection for field calculations and refrigeration diagnostics.