ie-rgii-non-domestic-gas-safety study plan

Map the regulatory hierarchy that governs non-domestic gas work in Ireland - Acts, statutory instruments, IS/EN standards and RGII registration criteria - into a one-page decision tree that starts at "job type" and ends at "which standard applies".

Calculate pipe sizing for three worked non-domestic scenarios (a 35 kW commercial boiler run, a manifold feeding two 60 kW appliances, and a long-run 15 m riser) using the pressure-drop method, and state the assumed diversity and diversity factor for each.

Compare copper, steel, PE and multilayer pipe for a commercial kitchen and an external LPG yard line, listing jointing method, support spacing and sleeve/ducting requirement for each.

Identify the ten most common non-compliance findings on commercial pipework installation and state the correct practice for each.

Explain combustion chemistry for natural gas and LPG - stoichiometric air requirement, CO2 max, excess air, dew point and flame temperature - and calculate theoretical air for two appliance ratings.

Distinguish the control-chain functions on a commercial appliance (flame supervision, gas pressure proving, air pressure proving, high/low gas pressure switches, safety shut-off valves) and state the failure response of each.

Classify flue types (room-sealed balanced, open flue, fan-draught, shared flue) and match each to a realistic commercial application with the applicable terminal and clearance rules.

Diagnose five appliance fault scenarios from described symptoms and state the safe isolation and test sequence for each.

Calculate required ventilation openings for a commercial boiler room and a kitchen using the ventilation rate and opening-area approaches, and reconcile the two results.

Determine combustion air provision for an appliance installed in a compartment, including high- and low-level opening sizing and the effect of mechanical extract on the compartment.

Interpret flue gas readings - CO, CO2, O2, excess air, flue temperature and efficiency - and identify the reading pattern that indicates incomplete combustion versus dilution.

Perform combustion analysis on at least two live or simulated appliances and record results on a standard combustion analysis record.

Explain CO formation, COHb physiology and the ambient CO action levels that trigger evacuation versus investigation.

Write the full tightness testing procedure for a medium-pressure commercial installation, including test pressure, stabilisation period, permissible pressure drop and the strength-test relationship to the tightness test.

Calculate permissible pressure drop for three pipe volumes and justify the figures used.

Sequence a nitrogen or gas purge for a commercial system, stating purge volume, purge point, venting location and the oxygen/gas concentration criteria for completion.

Produce a commissioning checklist covering appliance start-up, gas rate verification, operating pressure, combustion readings and safety device proving.

Produce a decommissioning procedure covering isolation, purging to air, labelling and record retention.

Specify gas detection for a plant room and a commercial kitchen - target gas, sensor placement, alarm set points, audible/visual warning and interlock actions - and justify each choice.

Draft an emergency response procedure for a reported gas escape in an occupied commercial building, from detection through evacuation, isolation and handover to the emergency service.

Explain the RGII notification, registration and certification obligations that attach to non-domestic work, and identify which jobs require notification before work starts.

List the records an RGII-registered installer must retain and produce on request, and the retention period.

Complete a full installation handover pack for a hypothetical commercial boiler replacement: declaration of conformity, commissioning record, benchmark-style schedule, warning labels and user instructions.

Audit a sample pipework installation against the design, recording deviations and writing the corrective actions in the format an inspector would accept.

Produce as-fitted drawings and a pipework schedule that reconcile with the original design and note every deviation.

Write a client handover briefing script covering isolation points, emergency actions and maintenance intervals.

Revisit the weakest-scoring domain from weeks 2, 3 and 4 and close the gap with targeted worked problems rather than re-reading.

Solve ten mixed calculation problems under time pressure covering gas rate, heat input, air requirement, ventilation opening size, pressure drop and combustion efficiency.

Explain the interaction between appliance controls, flueing and combustion performance when a single fault produces multiple abnormal readings.

Sit two full-length timed mock exams and record the score by domain to identify any remaining weak area.

Rehearse the regulatory, emergency and documentation content that is easy to lose marks on - notification thresholds, retention periods, set points and certification wording.

Build a one-page pre-exam reference sheet of figures, set points and standard references you must recall from memory.