HVAC Mastery vs Mathnics

HVAC Mastery is the hands-on study companion for anyone learning the heating, ventilation, air conditioning, and refrigeration trade — from first-year apprentices to experienced technicians brushing up for certification. WHAT YOU'LL LEARN 4 structured learning tracks take you from fundamentals to EPA 608 certification prep: - HVAC Fundamentals: Heat transfer, refrigeration cycle, system components, electrical basics - Core Systems: Air conditioning, heat pumps, gas furnaces, air distribution, controls - Advanced Systems: Commercial refrigeration, hydronic systems, IAQ, building automation - EPA 608 Certification: All four sections (Core, Type I, Type II, Type III) with full practice exams INTERACTIVE DIAGRAMS & TOOLS Go beyond reading — tap, test, and troubleshoot: - Electrical circuit diagrams with interactive disconnect, contactor, and transformer controls - Motor wiring diagrams for PSC, CSR, split-phase, ECM, and 3-phase motors with on-diagram meter probes - Thermostat wiring simulator for heat pump, gas furnace, A/C, and electric heat systems - Refrigerant cycle simulator with fault injection — see what happens when components fail - Built-in calculators: superheat/subcooling, Ohm's law, wire sizing, duct sizing, refrigerant charge HANDS-ON CHALLENGES Test your skills with real-world scenarios: - Wiring challenges: wire a system from scratch and check your work - Troubleshooting challenges: diagnose faults using meter readings step by step - Service call scenarios based on actual field situations from HVAC textbooks - Timed quizzes for every module with score tracking FIELD REFERENCE TOOLS Quick-access references you'll use on the job: - Refrigerant guide with P/T charts for 20+ refrigerants including R-290 and R-454B - Winding resistance tables, megohm test thresholds, capacitor testing procedures - ECM error codes, amp draw diagnostics, motor rotation checks - Compressor diagnostic reference with wiring and electrical nomenclature STUDY FEATURES - 190+ flashcards covering every major topic - Bookmarks and personal notes on any lesson - Dark mode for late-night study sessions - Daily study reminders to keep your streak alive - Progress tracking with badges and completion percentages - Cloud sync — pick up where you left off on any device COMPLETELY FREE HVAC Mastery is 100% free. All lessons, quizzes, flashcards, interactive diagrams, and field reference tools are available at no cost. Create an account to save your progress across devices. Privacy Policy: https://hvacmastery-app.vercel.app/privacy Terms of Service: https://hvacmastery-app.vercel.app/terms Built by HVAC professionals for HVAC professionals. No ads — just the knowledge you need to pass your exams and succeed in the field.

Sharpen your mental math, one equation at a time. Mathnics is a colorful, timed quiz app for kids and adults who want fast, focused practice — no accounts, no ads, no internet connection required. PROGRESS THROUGH 5 SKILL TIERS Beginner, Intermediate, Advanced, Expert, and Master — 50 levels each, 250 in total. Every level is a 10-question timed round that gets a little harder and a little faster than the last, covering 18 math functions: addition, subtraction, multiplication, division, percentages, percent change, modulus, factors, remainders, powers, roots, order of operations, fractions, geometry, angles, algebra, and speed/distance/time. DAILY AND WEEKLY CHALLENGES A fresh 5-stage Daily Challenge every day and a 20-stage Weekly Challenge every week, sampling every tier. Same puzzle for everyone on the same day or week — come back and compare notes. TIME TEST Two speed modes: Speed Count (how many can you solve in 30 seconds, 1 minute, or 2 minutes?) and Speed Run (clear 10 questions as fast as you can, no per-question timer). Personal bests tracked per tier. FREE PLAY & STAR RATINGS Replay any unlocked level for practice. Every level earns 0-3 stars based on accuracy, with running totals on the main menu and every tier. MATH GAME PRO Beginner and Intermediate are free to play through completely. Mathnics Pro ($6.99) unlocks every level of Advanced, Expert, and Master (including their Daily/Weekly Challenge stages), removes the daily cap on Time Test, and unlocks the Detailed Stats screen — a full breakdown of accuracy by every math function, so you know exactly what to practice next. No accounts. No ads. No tracking. Just math.