Scholarly record

OCCUPATIONAL SAFETY RISK ASSESSMENT FOR RESIDENTIAL HVAC INSTALLATION AND MAINTENANCE USING A SIMPLIFIED MATRIX AND DESIGN-FOR-SAFETY GUIDELINES

Dennis-Paul FRENTIU, Alexandru MINA, Titus Frentiu, Diana FILIP, Dragos Vasilescu

Abstract

Residential HVAC work (installation, commissioning, and periodic maintenance) is often performed by small teams under time pressure and in variable site conditions. Despite being routine, these tasks involve recurring occupational hazards: chemical exposure to refrigerants and oils, electrical shock during connections and testing, falls during outdoor unit mounting, manual handling injuries, and ergonomic strain from constrained postures. This paper presents a super-simple, practice-oriented method to identify, evaluate, and reduce these risks, while also outlining a future-ready path for digital optimization and patentable tooling. The proposed approach structures HVAC work into clear steps: transport and lifting, drilling and bracket installation, piping and flaring, vacuum and charging, electrical connection, functional testing, and routine maintenance (filter cleaning, coil washing, leak checks). For each step, a short hazard list is defined and scored using a classic risk matrix (Severity x Probability) with three levels per axis. This keeps the assessment understandable to field technicians and allows consistent reporting across projects. A simple case-study template is included: one fictional split-system installation in a typical apartment building, with site constraints such as limited balcony space and shared electrical panels. Based on the matrix results, the paper proposes prevention and protection measures that are intentionally minimal but high impact. Examples include: refrigerant-safe handling procedures and ventilation during charging; lockout-tagout basics for residential circuits; insulated tools and pre-use testing of voltage; fall protection for exterior work (anchoring points, ladder rules, and two-person handling); and ergonomic controls (weight limits, use of trolleys, and lift-assist techniques). The method also recommends a small mandatory PPE set (chemical-resistant gloves, eye protection, basic respiratory protection for cleaning sprays, and electrical-rated footwear). A separate section focuses on design-for-safety recommendations that reduce risk before work starts: optimal unit placement for safe access, dedicated service clearances, protected cable routing, drip management to avoid slippery surfaces, and labeling that supports maintenance without guesswork. From an inventor's perspective, the paper highlights a patentable concept for a mobile checklist and scoring tool that uses QR codes on units to auto-load the correct hazards, controls, and minimum training requirements, and to generate a signed, time-stamped risk record. Future work includes field trials with local installers, integration with incident reporting, and refinement of the scoring rules for different building types and climates.

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