HVAC Code Quick Reference Guide — IMC 2021/2024, Field Reference (Excel/PDF)

The field reference every HVAC tech wishes they had on their first day. 16 sections covering the International Mechanical Code (2021 & 2024 editions), refrigerant tables, gas piping, electrical requirements, and every formula you need in the field — in one document.
Built by a licensed tradesman. Not a generic template. Not a textbook excerpt. A purpose-built reference guide for the working HVAC professional.
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16 SECTIONS — EVERYTHING IN ONE PLACE
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📖 Ventilation Requirements — CFM rates per occupancy, residential exhaust, garage ventilation (IMC Ch. 4)
📖 Duct Sizing & Construction — Supply sizing by CFM (15 sizes), return sizing by tonnage, materials, support spacing, sealing classes (IMC Ch. 6)
📖 Combustion Air — All 4 methods with sizing table, opening calculations, critical rules (IMC Ch. 7)
📖 Chimneys & Venting — Vent types, termination clearances, single-wall rules, appliance categories I-IV (IMC Ch. 8)
📖 Clearances & Installation — Equipment clearances for 9 equipment types, access requirements, combustible flooring (IMC Ch. 3 & 9)
📖 Refrigerant Tables — 10 refrigerants with safety classifications, GWP, flammability, and full 2024 A2L requirements (IMC Ch. 11)
📖 Hydronic Piping — 7 pipe materials, support spacing, expansion tanks, safety relief valves (IMC Ch. 12)
📖 Equipment Sizing — Manual J/D/S overview, tonnage & BTU conversions, airflow formulas, furnace temp rise ranges
📖 Common Code Violations — Top 20 violations with IMC section references, how to fix each one, and what inspectors look for
📖 Permit & Inspection Checklist — Pre-install (10 items), rough-in (10 items), final inspection (17 items), common rejection reasons
📖 Electrical for HVAC — Disconnect requirements, wire sizing by MCA (8 ranges), breaker sizing, grounding rules (NEC 440)
📖 Gas Piping — Black iron sizing table (6 sizes × 7 lengths), CSST sizing, appliance BTU demands, sediment trap & shut-off rules (IFGC)
📖 Energy Code — SEER2/HSPF2/AFUE minimums by region, duct insulation R-values, pipe insulation requirements (IECC)
📖 P/T Chart — 6 refrigerants × 25 temperatures, target superheat table for fixed orifice, target subcooling for TXV, temperature split reference
📖 Conversions & Formulas — 14 unit conversions, Ohm's law, power formulas, motor FLA table (11 HP sizes), rules of thumb
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WHAT MAKES THIS DIFFERENT
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✅ Every IMC section number is cited — look up the full code when you need it
✅ 2024 updates flagged with ⚡ icons so you see exactly what changed from 2021
✅ Color-coded warnings, tips, and code references for instant visual scanning
✅ Print-optimized — prints cleanly on 8.5×11 landscape for the truck or clipboard
✅ Not a 500-page code book — this is the stuff you actually use in the field, organized so you find it in seconds
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WHAT YOU GET
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📊 Excel file (.xlsx) — 16-tab workbook, works in Excel and Google Sheets
🖨️ PDF file — Print-ready, same content formatted for paper
📄 Quick Start Guide — Plain-English instructions for opening and navigating
📄 Google Sheets instructions — For those without Excel (free option)
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PERFECT FOR
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✔ HVAC technicians and installers
✔ HVAC contractors and service companies
✔ Apprentices studying for licensing exams
✔ HVAC instructors and training programs
✔ General contractors managing HVAC subs
✔ Home inspectors referencing mechanical code
✔ Anyone who's tired of flipping through a 400-page code book on the job site
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FILE DETAILS
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Format: Excel (.xlsx) + PDF
Compatibility: Microsoft Excel, Google Sheets, LibreOffice
Works on: Windows, Mac, tablets, phones
Delivery: Instant digital download
Print-ready: Yes — landscape, optimized margins
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⚠️ This is a digital product — no physical items shipped. This is a reference guide, not the code itself. Always verify requirements with your local AHJ. No refunds on digital products per Etsy policy.
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