What's on the Denver DENFA / FA2 Exam: NFPA 72 (2025) + Denver Amendments

The Denver DENFA / FA2 fire alarm exam is administered by Compliance Services & Assessments (CSA), computer-based, open-book under audio/video proctor, with an 80% passing score — the highest passing threshold of any practitioner fire alarm exam in the country. The reference set: NFPA 72 (2025 edition), NFPA 70 (NEC, validated 2020-2026 editions), the 2024 International Fire Code, and the 2025 Denver Amendments to the Building and Fire Code.

This post breaks down what each reference contributes, where the test weight tends to land, and how to structure study for an open-book exam with an 80% pass bar. Targeted Denver FA2 practice tests built from the current NFPA 72 (2025) are the cleanest way to drill the technical core.

Exam format at a glance

Spec	Value
Vendor	Compliance Services & Assessments (CSA)
Format	Computer-based, open-book, audio/video proctored
Passing score	80%
Cost	$230 per attempt
Renewal	Full re-take every 3 years
References	NFPA 72 (2025), NFPA 70 (NEC), 2024 IFC, 2025 Denver Amendments

A note on the question count: CSA does not publish the exact number of items on the live DENFA/FA2 on its public test-info page; specifics live in the CSA study guide behind purchase. Plan against the published reference set and 80% pass bar rather than against a number you saw on a third-party site.

NFPA 72 (2025) — the technical core

Denver tests the 2025 edition, which restructured several chapters from 2022 (spacing rules, mass notification, ITM frequencies).

Chapter 17 — Initiating Devices. Smoke detector spacing (smooth ceiling, beam/joist, sloped), heat detector classifications, pull station mounting, duct detector requirements.

Chapter 18 — Notification Appliances. Candela ratings, mounting heights, ADA audibility (15 dBA above ambient or 5 dBA above max for 60 seconds), strobe sync. The 2025 edition tightened a few rules.

Chapter 23 — Protected Premises. Circuit class definitions, pathway designations, monitoring for integrity, survivability. CSA often asks "minimum pathway class for X scenario."

Chapter 14 — ITM. Frequencies, sensitivity testing, documentation, impairment flow.

Chapter 24 — ECS. Mass notification and in-building ECS rules — expanded in 2025 and high-yield on Denver FA2 practice tests.

NFPA 70 (NEC) — Article 760 and the low-voltage layer

The NEC portion focuses on Article 760 (fire alarm systems) plus surrounding low-voltage rules:

• Article 760 — cable types (FPL, FPLR, FPLP), separation from power conductors, conduit fill, Class 2 vs. Class 3 wiring
• Article 725 — Class 1, 2, 3 remote-control and signaling circuits
• Voltage drop calculations — a recurring Denver exam topic, especially for long-pull notification circuits
• Wire resistance and sizing — Denver's panel-clearance and circuit-loading questions reliably ask about this

CSA's content area description explicitly includes "voltage drop, wire resistance/size, acoustic levels/loss." Drill these calculations under timed conditions with focused Denver FA2 practice tests — open-book references won't help you flip through the NEC mid-calculation if you haven't done the math before.

2024 IFC and 2025 Denver Amendments — the local moat

Denver adopted the 2024 IFC as its model code, then layered amendments on top. IFC questions focus on occupancy-triggered fire alarm requirements, notification coverage, carbon-monoxide detection, and construction/impairment provisions. If your background is NFPA-only (NICET-style), the IFC sections are the most likely place to lose points.

The 2025 Denver Amendments are the differentiator. Denver publishes annual amendments that modify the 2024 IFC for Denver use — local occupancy triggers, stricter notification rules, acceptance-test procedures unique to DFD review, and submittal requirements. There's no national prep that covers the Amendments; CSA's study guide is the only first-party source. The second-party material is dump-seller sites (CertsArea, TrueCerts, Studumps) of dubious accuracy.

Honesty on coverage: our current Denver FA2 practice tests cover NFPA 72 (2025) and NEC thoroughly. The 2025 Denver Amendments overlay is in our follow-up release.

Topic-by-topic study plan

A 6-week plan that respects the 80% pass bar:

Week	Focus	References
1	Initiating devices + fundamentals	NFPA 72 Ch. 10, 17
2	Notification, mass notification	NFPA 72 Ch. 18, 24
3	Circuits, pathways, ITM	NFPA 72 Ch. 14, 23
4	NEC Article 760 + voltage-drop math	NEC Art. 725, 760
5	2024 IFC + Denver Amendments	IFC + Denver Amendments
6	Full-length practice + retake-risk areas	All

If you have less time, prioritize NFPA 72 Ch. 17, 18, 23 plus the NEC voltage-drop calculations. Those four areas dominate the technical portion of the test.

The 80% pass bar means you cannot afford to "let the IFC slide" or "wing the Denver Amendments." A weak section that drops you to 75% on a closed-book exam still passes; on this one, it fails you for $230.

What to do next

The DENFA/FA2 doesn't reward shallow open-book reliance. The 80% pass bar means every reference table and every Denver-specific rule has to be in your head, with the codebook as confirmation rather than crutch.

Our Denver FA2 practice tests cover the NFPA 72 (2025) and NEC chapter mix above thoroughly, with the 2025 Denver Amendments overlay coming in a follow-up release. Every question includes detailed answer explanations with codebook references — built around the same standards the official exam uses.

Want to gauge your readiness first? Take our free 10-question Denver FA2 sample test — no commitment, just a quick calibration before committing to the full study path.