Earthquake Gas Safety for Aged Care Facilities — What Operators Need to Know
Risk Group SI — Why Aged Care Has Different Rules
Under the New Zealand Building Code, aged care facilities fall into Risk Group SI (C/AS3) — buildings where occupants require assistance to evacuate. Fire and Emergency New Zealand (FENZ) requires these facilities to maintain approved evacuation schemes under the Fire Safety, Evacuation Procedures, and Evacuation Schemes Regulations 2018.
These classifications exist because the assumptions that work in commercial buildings — that occupants will hear an alarm, move independently, and exit within minutes — do not hold in aged care. Evacuation takes longer. It requires more staff. And it competes with every other post-earthquake priority: welfare checks, medical responses, structural assessment.
Gas infrastructure adds a layer that evacuation planning alone cannot address.
The Gas Problem in Aged Care
Most aged care facilities run gas continuously — central heating, hot water, laundry, and often commercial kitchens. That gas infrastructure doesn’t pause during an earthquake. If a joint fails or a connection loosens, gas flows into the building until someone manually isolates the supply at the meter.
In a Risk Group SI building, the people best placed to do that — maintenance staff — are likely occupied with resident welfare. At night, staffing is minimal. The gap between a gas line failure and manual isolation can stretch to minutes, and in aged care, minutes matter more than in almost any other building type.
Where Automatic Gas Isolation Fits
An approved evacuation scheme addresses how people get out. Automatic seismic gas isolation addresses what happens to the gas supply while they do.
The Solid State Seismic Shutoff — MK6 detects earthquake ground acceleration and triggers a gas shutoff valve before the destructive shaking arrives. For aged care operators, the practical effect is that gas isolation happens independently of staff availability — at 2am on a Sunday with skeleton staffing, the system responds identically to a fully-staffed weekday.
The DC variant is worth noting for aged care specifically: it accepts 12–230V DC from a no-break power supply, so seismic detection continues through mains outages. In facilities where loss of heating is itself a health risk for residents, knowing the safety system doesn’t depend on mains power matters.
Compliance, Insurance, and Due Diligence
Ngā Paerewa — the Health and Disability Services Standard (NZS 8134:2021) — sets quality and safety requirements for age-related residential care. It does not prescribe specific gas safety devices or address seismic risk directly. However, the broader duty to provide a safe physical environment arguably extends to foreseeable hazards like post-earthquake gas releases — particularly in facilities where residents cannot self-evacuate. Operators should seek their own compliance advice on this point.
Insurers are increasingly attentive to this area. An electronic trigger system with event recording provides documented evidence that gas was isolated automatically during a seismic event — useful for both incident reporting and insurance claims.
Next Steps
If you operate an aged care facility in New Zealand and want to understand how automatic seismic gas isolation fits alongside your existing evacuation scheme and compliance obligations, get in touch. The MK6 is NZ-made, backed by over 50 years of operation, and supported locally.