33.1 PPE: Hearing, Head, Eye, Face & Respiratory Protection

33.1 PPE: Hearing, Head, Eye, Face & Respiratory Protection

Trade Area G — Safety is 9 percent of the Class A trade exam and 10 percent of Class B. The first cluster on the official outline is hearing and head protection, then eye and face protection, then respiratory protection. The 2026 Air Conditioning CBT book for this chapter is OSHA 29 CFR 1926, July 1, 2025 edition (R46). Florida’s Construction Industry Licensing Board also requires at least one hour of workplace safety in every 14-hour biennial CE cycle under F.S. 489.115(4)(b) and 61G4-18.001 — the same numbers you will see on a jobsite, not a separate “contractor-law only” safety set.

Personal protective equipment (PPE) is the last layer, not the first. 29 CFR 1926.95 requires PPE whenever hazards of processes or environment, chemical hazards, radiological hazards, or mechanical irritants are capable of causing injury or impairment. 1926.28 puts the duty on the employer to require the wearing of appropriate PPE. Feasible engineering and administrative controls come first (quieter tools, rotate the grinder, isolate the compressor). PPE is what remains after those controls. The qualifier who “lets the guys decide” has not met 1926.95.

Quick Answer: Construction noise is Table D-2: 90 dBA for 8 hours, measured A-scale slow response. If you cannot get there, fitted hearing protection — not cotton. Hard hats are ANSI Z89.1. Eye and face gear is ANSI Z87.1, with a face shield over primary eyewear. Tight-fitting respirators need a written 1910.134 program, medical evaluation, and a fit test before first use. Below 19.5 percent oxygen, the atmosphere is oxygen-deficient.

Hearing — 1926.52 and 1926.101

1926.52(a) requires protection against noise when sound levels exceed Table D-2, measured on the A-scale of a standard sound-level meter at slow response. 1926.52(b) is the control order: when employees are subjected to levels exceeding the table, feasible administrative or engineering controls shall be utilized; if those fail to bring levels within the table, PPE required by Subpart E shall be provided and used. 1926.52(d)(1) also requires a continuing, effective hearing conservation program in all cases where sound levels exceed the table. That is not a free pass to skip controls and hand out foam.

Table D-2 is the exam table. Learn the landmarks, not a vague “loud tools need plugs.”

The table uses a 5 dB exchange rate: roughly, every 5 dB increase halves the allowed time. 1926.52(c) treats variations with maxima at intervals of 1 second or less as continuous. When the day is mixed, 1926.52(d)(2) adds the fractions: if C1/T1 + C2/T2 + … exceeds unity, the mixed exposure exceeds the limit. Worked mixed day: a helper runs a cutoff saw at 100 dBA for 1 hour (table allows 2 hours, so 1/2) and then works 4 hours at 90 dBA (table allows 8 hours, so 4/8 = 1/2). Combined dose = 1.0 — the full daily limit with no remaining room for a noisy compressor room.

Do not import 29 CFR 1910.95’s 85 dBA action level onto a construction question unless the stem is general industry. Construction’s table starts at 90 dBA for eight hours. OSHA still recommends protection at 85 dBA; the enforceable construction PEL is the table.

1926.101 is the PPE rule that rides with the table. Wherever it is not feasible to reduce noise levels or duration to Table D-2, ear protective devices shall be provided and used. Devices inserted in the ear shall be fitted or determined individually by competent persons. Plain cotton is not an acceptable protective device. A wadded shop rag, a cigarette filter, or “I stuffed cotton in because the muffs were hot” is a citation, not a field workaround. The competent person here is the person who can fit or determine the device — not a helper who grabs a bag of unmatched plugs from the van.

HVAC noise that routinely challenges the table: cutoff saws and grinders on galvanized and stainless, powder-actuated fasteners into steel decks, pneumatic chisels on concrete pads, recovery-machine exhaust in a closed mechanical room, and a rooftop adjacent to a generator. Dual protection (plugs plus muffs) is a method when one device cannot bring the protected exposure within the table; it is not a substitute for measuring the source.

Head protection — 1926.100

1926.100(a) is broad on purpose: employees working in areas where there is a possible danger of head injury from impact, or from falling or flying objects, or from electrical shock and burns, shall be protected by protective helmets. A Florida rooftop with bar joists, a crane setting a rooftop unit (RTU), a mechanical room with pipe racks, and a residential changeout under a garage-door opener are all “possible danger” facts. “We only wear hats when the GC’s superintendent is on site” is not the standard.

1926.100(b) requires helmets that meet ANSI Z89.1-2009, Z89.1-2003, or Z89.1-1997 (all incorporated by reference in 1926.6). High-voltage electric shock and burns also need the electrical insulation specifications in Section 9.7 of those consensus standards. In the field that is the difference between a Class E (electrical, tested to 20,000 volts) helmet and a Class C (conductive) bump cap. Type I helmets are tested for top impact; Type II add lateral impact. HVAC techs under duct mains and in occupied construction sites with overlapping trades commonly need Type I Class E as the default, and Type II where side impact from swinging boom parts or pipe is foreseeable.

A cracked shell, a missing or reversed suspension, a hat stored against a truck rear window until the plastic is brittle, or a hat worn bill-backward so the suspension no longer centers the shell are all failures of 1926.95 maintenance. Stickers that hide cracks or that the manufacturer forbids can void the listing. Baseball caps and hoodies are not helmets.

Eye and face — 1926.102

1926.102(a) requires the employer to ensure each affected employee uses appropriate eye or face protection when exposed to flying particles, molten metal, liquid chemicals, acids or caustic liquids, chemical gases or vapors, or potentially injurious light radiation. Devices must comply with ANSI/ISEA Z87.1-2010, Z87.1-2003, or Z87.1-1989 (R-1998). Side protection is required when the hazard is flying objects. Prescription-lens wearers need protective spectacles that incorporate the prescription or wear protection over the street glasses — fashion sunglasses from a beach shop are not Z87.1.

HVAC tasks map to different devices:

• Grinding, cutting, chipping, powder-actuated tools — Z87.1 spectacles with side shields, or goggles; add a face shield when particles can ricochet into the face. The shield does not replace the spectacles.
• Coil cleaner, acids, caustics, solvents — chemical splash goggles (indirect-vented), not perforated dust goggles. A face shield over the goggles when pouring or spraying.
• Brazing, soldering, welding, cutting — filter lenses from OSHA’s Table E-1 by process and current. A #2 comfort lens for soldering is not a #10 arc-welding lens. Helpers watching a braze still need the shade or they need to look away behind a screen.
• Refrigerant and nitrogen under pressure — eye protection whenever a fitting can let go. Safety glasses stay on while recovering, pressure-testing, and cracking a king valve.

Respiratory protection — 1926.103 and 1910.134

Construction 1926.103 adopts the general-industry respiratory protection standard, 1910.134. If a hazard assessment says a respirator is required (not voluntary comfort), the employer must have a written program with worksite-specific procedures, a program administrator, and training. Sequence that the exam likes:

1. Identify the airborne hazard (dust, metal fume, solvent vapor, refrigerant, oxygen displacement).
2. Try engineering and administrative controls (local exhaust, wet methods, outdoor work, ventilation).
3. Select a NIOSH-certified respirator with an assigned protection factor (APF) that reduces exposure below the permissible exposure limit (PEL) in 1926.55 Appendix A.
4. Send the wearer to a physician or other licensed health care professional (PLHCP) for a medical evaluation before fit testing and first use.
5. Fit-test every tight-fitting facepiece (qualitative or quantitative) before first use, whenever a different facepiece is used, and at least annually thereafter.
6. No facial hair that comes between the sealing surface and the face, or that interferes with valve function.
7. Cartridge change schedules for vapors (do not wait for “I can smell it”); atmosphere-supplying respirators for immediately dangerous to life or health (IDLH) and oxygen-deficient atmospheres.

Oxygen-deficient atmosphere means oxygen content below 19.5 percent by volume. Breathing air supplied to atmosphere-supplying respirators must be 19.5–23.5 percent oxygen. A leaking chiller, a flooded machinery room, a crawlspace after a refrigerant dump, or a nitrogen-purged pipe is an asphyxiation problem, not a “put on an N95” problem. N95 filtering facepieces have an APF of 10 and do nothing for oxygen displacement or many refrigerant vapors. IDLH or unknown atmospheres need a pressure-demand self-contained breathing apparatus (SCBA) or an equivalent supplied-air respirator with an escape bottle — plus a rescue plan. Section 33.2 covers machinery-room ventilation; this section is the respirator decision that follows the alarm.

Voluntary use of a dust mask for nuisance drywall dust can be lighter (Appendix D of 1910.134), but the moment the employer requires the mask because silica, insulation fiber, or a PEL is in play, the full program attaches. Coil-cleaner mist, spray adhesives on ductboard, and brazing fume on galvanized or stainless are required-use candidates after the SDS and the PEL are read — not after a tech “feels tightness.”

Florida HVAC scenario

A certified Class B crew in Fort Myers is changing a 4-ton package unit on a strip-center roof. One tech cuts curb flashing with a grinder (typically well above 90 dBA at the ear), another brazes the line set, a helper holds galvanized scrap, and the GC’s framer is powder-driving track ten feet away. The qualifier’s truck has a bag of unmatched foam plugs, two cracked bump caps, fashion sunglasses, and a box of N95s “for insulation.” Cotton is in one helper’s ears because the muffs were left in the shop.

Every layer of that picture is an Area G miss. Measure or reasonably anticipate the grinder and powder-actuated exposure against Table D-2; provide fitted plugs or muffs and require their use (1926.101). Issue ANSI Z89.1 helmets because falling and flying objects are possible on an active roof. Issue Z87.1 spectacles with side shields for grinding and the correct filter shade for the braze; add a face shield on the grinder. Do not treat the N95 as a machinery-room or refrigerant-leak respirator, and do not require it without medical evaluation and (for a tight-fitting mask) a fit test. Class B’s 25-ton / 500,000 Btu cap does not shrink OSHA. The same Fort Myers roof, the same 1926 book.