With the return to in-person learning happening across the province, school boards have been looking for ways to reassure parents everything possible is being done to make classrooms safe.
For the Waterloo Catholic District School Board, those efforts now include the power of the sun.
"So the UV light kills the bacteria as it goes through," said Terri Pickett, senior manager of facility services for the Waterloo Catholic District School Board.
"It actually alters the DNA as it goes through, so it kills it more than just filters it."
The WCDSB says it has ordered around 11-hundred UV air purifiers to be installed in classrooms across the school system.
Pickett does admit though, because the coronavirus is not considered to be airborne, the new purifiers don't prevent it from getting into the schools
But it is an added defense against it spreading through a school.
Funding for the new equipment came from the Ministry of Education and Pickett says the decision was made, rather than spend it all on a handful of schools, to spread the funding out across the system.
"We are starting at the schools that probably have older systems and every classroom where it's a teaching classroom where there is a proper class of students will all be getting them."