"Each of our classes has not long completed St John first aid sessions, which our students enjoyed and really responded well to," Simes said.
"It was the icing on the cake to hear that our school had won an AED, and we look forward to having this accessible for our school, for our Durie Hill community and for the general public."
Simes introduced Pip Grant from Whanganui St John and told the children that she cares for people in the area who have medical alarms.
"Some of your grandparents may have St John medical alarms," he said.
"My mother has one that she used when she had a medical emergency and it helped save her life."
St John central districts youth manager Marlene Rankin said the organisation is working hard to install AEDs in public locations across New Zealand, including schools, marae, sports grounds and businesses, to help improve cardiac arrest survival rates.
Rankin said studies by St John have revealed that every minute that goes by without CPR or defibrillation reduces the chance of survival by 10 to 15 per cent, with only about 15 per cent surviving a cardiac arrest.
"Having an AED at Durie Hill School will help keep everyone in your community safer," she said.
Simes said school staff were to have lessons in using the AED when children went home for the day and the device would be mounted near the gate where it can be easily accessed.
The ASB St John in Schools programme has delivered lessons to more than 9000 primary school pupils nationally. Schools interested in the programme can contact St John online at stjohn.org.nz/schools.