# Extinguisher class selector

Match a described hazard to the A, B, C, D or K definitions in CCOHS guidance. This is a planning aid for a conversation with your service company. Do not use it during a fire.

Use the tool on the [web page](https://extinguishers.fyi/tools/extinguisher-class-selector). It works without JavaScript.

## How to use it

1. Choose which hazard are you planning for?.
2. Read the result.

## How it works

CCOHS, Fire Extinguishers: Portable, fetched 2026-11-10: https://www.ccohs.ca/oshanswers/safety_haz/fire_extinguishers.html . A covers ordinary combustibles; B covers flammable liquids and gases; C covers energized electrical equipment; D covers combustible metals; K covers cooking oils and fats in cooking appliances.

The tool maps the selected description to a definition. It does not choose capacity, agent quantity, number, location or whether it is safe to act. A mixed or uncertain hazard needs an assessment.

CCOHS warns against water on electrical, flammable liquid or cooking oil fires. It says to use a Class D extinguisher compatible with the metal. Read the actual equipment label and follow training.

> Definitions only. Ask a qualified service company and your local fire authority about your premises. In an emergency, follow your emergency plan.

## Questions

### Does the result tell me to fight a fire?

No. CCOHS advises evacuation and calling the fire department if you lack the correct equipment or are not confident you can act safely.