# How Chariho evaluated an energy-saving IEQ strategy

eventtion could support classroom conditions while reducing reliance on energy-intensive ventilation...

## VENTILATION

**ALONE**

**LOCALIZED**
**AIR CLEANING**  
!

Classroom conditions and energy assumptions measured and analyzed against operational baseline.  
!  
! !

## KEY FINDINGS

Up to

**34%**  
reduction of sub

0.5 μm particle in
5 minutes

Up to  
**5x**
more effective than
ventilation alone for
particle removal

Up to  
**57%**  
modeled classroom  
!

heating energy reduction

## Why it mattered

The district needed evidence that indoor environmental quality and energy goals could be addressed together, without adding classroom disruption.

## What this made possible
A more evidence-based path for evaluating ventilation, air cleaning and energy tradeoffs in occupied classrooms  
!

***“Metalmark’s systems make a real difference in classrooms by providing***  
***cleaner, healthier air and creating an environment supporting better learning”***  
C h a r i h o S c h o o l S u p e r i n t e n d e n t , G i n a P i c a r d  
!