Helium gas is safe to use providing you follow the safety guidelines outlined below:
Do not deliberately inhale helium. Although not poisonous, this gas could result in DEATH by asphyxiation or damage to your lungs. This warning is endorsed by the British Compressed Gasses Association.
Never open the cylinder valve without fitting an inflator. Once the inflator is connected, open the valve slowly.
Never use equipment which may be damaged. Under no circumstances attempt to repair any item of equipment.
When transporting a cylinder by car ensure that the vehicle is well ventilated and the cylinder is well secured.
Ensure cylinders are stored in well ventilated areas, away from direct heat.
Always wear eye protection when using a cylinder. When inflating balloons always point the balloons and inflator away from you. Remember to close the cylinder valve after use.
Always use a proper trolley for moving large cylinders, ever for a short distance.
Always fasten the cylinder to a secure support in an upright position when in use. Cylinders can cause serious injury if they fall over or roll onto you.
Keep cylinders away from children at all time. Responsible adults only should use cylinders and other equipment.
DO NOT USE HYDROGEN. Hydrogen has a higher lift ability than Helium BUT is highly inflammable and dangerous.