| NFPA 70: National Electrical Code 2008 PDF | dunbarselectric.com | 7.99 USD | 120 USD | −93.3% |
| NFPA 70: National Electrical Code (NEC) Handbook, 2011 | contractorexampreps.com | 298.25 USD | 326 USD | −8.5% |
| NFPA 101 Life Safety Code, 2015 Edition | contractorexampreps.com | 168.5 USD | 181.7 USD | −7.3% |
| Fire Alarm Signaling Systems, 2010, 4th Edition | contractorexampreps.com | 164.95 USD | 177.8 USD | −7.2% |
| NFPA 70: National Electrical Code (NEC), 2011 Edition; Spiralbound/Softcover | contractorexampreps.com | 162.5 USD | 175 USD | −7.1% |
| NFPA 99: Health Care Facilities Code, 2018 Edition | contractorexampreps.com | 154.99 USD | 166.75 USD | −7.1% |
| NFPA 90A Installation of Air Conditioning and Ventilating Systems, 2018 | contractorexampreps.com | 154.99 USD | 166.75 USD | −7.1% |
| NFPA 780: Standard for the Installation of Lightning Protection Systems, 2017 Edition | contractorexampreps.com | 154.99 USD | 166.75 USD | −7.1% |
| NFPA 96: Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations, 2017 Edition | contractorexampreps.com | 154.99 USD | 166.75 USD | −7.1% |
| NFPA 91 Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Noncombustible Particulate Solids, 2015 | contractorexampreps.com | 154.99 USD | 166.75 USD | −7.1% |
| NFPA 101: Life Safety Code Handbook 2024 – Official Commentary Edition | nfpabooks.com | 329.9 USD | — | — |
| NFPA 70: National Electrical Code (NEC) 2020 – Official Edition | nfpabooks.com | 329.9 USD | — | — |
| NFPA 70: National Electrical Code (NEC) 2023 Handbook – Official Commentary Edition | nfpabooks.com | 308 USD | — | — |
| NFPA 70: National Electrical Code (NEC) Handbook, 2023 Edition | theexampros.com | 307.99 USD | — | — |
| NFPA 13: Automatic Sprinkler Systems Handbook 2022 – Official Commentary Edition | nfpabooks.com | 287 USD | — | — |
| NFPA 99, Health Care Facilities Code, 2024 Edition | nfpabooks.com | 269 USD | — | — |
| NFPA 72, National Fire Alarm and Signaling Code Handbook, 2022 Edition | nfpabooks.com | 269 USD | — | — |
| NFPA 99, Health Care Facilities Code Handbook, 2024 Edition | nfpabooks.com | 269 USD | — | — |
| NFPA 58, LP-Gas Code Handbook, 2024 Edition | nfpabooks.com | 258 USD | — | — |
| NFPA 58, LP-Gas Code Handbook, 2024 Edition | nfpabooks.com | 258 USD | — | — |
| NFPA 70: National Electrical Code (NEC) 2017 with Chicago Amendments – Official Edition | nfpabooks.com | 218 USD | — | — |
| NFPA 13, Standard for the Installation of Sprinkler Systems, 2022 Edition | nfpabooks.com | 193.9 USD | — | — |
| NFPA 13, Standard for the Installation of Sprinkler Systems 2025 Edition | nfpabooks.com | 193.9 USD | — | — |
| NFPA 10, Standard for Portable Fire Extinguishers, 2022 Edition | nfpabooks.com | 189 USD | — | — |
| NFPA 70: National Electrical Code (NEC) 2026 – Spiralbound Edition | nfpabooks.com | 179 USD | — | — |
| NFPA 70: National Electrical Code (NEC) 2023 – Spiralbound Edition | nfpabooks.com | 179 USD | — | — |
| National Electrical Code 2020 | nfpabooks.com | 179 USD | — | — |
| NFPA 10, Standard for Portable Fire Extinguishers, 2026 Edition | nfpabooks.com | 178.9 USD | — | — |
| NFPA 101: Life Safety Code 2021 – Official Edition | nfpabooks.com | 176 USD | — | — |
| NFPA 101: Life Safety Code 2024 – Official Edition | nfpabooks.com | 176 USD | — | — |
| NFPA 101: Life Safety Code, 2012 Edition | theexampros.com | 175.99 USD | — | — |
| NFPA Code Book 2024 | mfstradeschool.com | 175 USD | — | — |
| NFPA 70B, Standard for Electrical Equipment Maintenance, 2023 Edition | nfpabooks.com | 174.9 USD | — | — |
| NFPA 70B: Standard for Electrical Equipment Maintenance 2026 – Official Edition | nfpabooks.com | 174.9 USD | — | — |
| NFPA 96: Standard for Ventilation Control & Fire Protection of Commercial Cooking Operations 2024 – Official Edition | nfpabooks.com | 174.9 USD | — | — |
| NFPA 25: Inspection, Testing & Maintenance of Water-Based Fire Protection Systems 2026 – Official Edition | nfpabooks.com | 174.9 USD | — | — |
| NFPA 20, Standard for the Installation of Stationary Pumps for Fire Protection, 2022 Edition | nfpabooks.com | 174.9 USD | — | — |
| NFPA 2, Hydrogen Technologies Code | nfpabooks.com | 174.9 USD | — | — |
| NFPA 20, Standard for the Installation of Stationary Pumps for Fire Protection, 2025 Edition | nfpabooks.com | 174.88 USD | — | — |
| NFPA 780: Standard for the Installation of Lightning Protection Systems 2026 – Official Edition | nfpabooks.com | 174 USD | — | — |