SmarterHEPA Air Monitors & Accessories Smarter HEPA Air Quality Monitors & Accessories Sale! Smarter HEPA QP Lite Air Quality Monitor $94.99 Original price was: $94.99.$89.00Current price is: $89.00. Add to cart Sale! Smarter HEPA QP Pro 2 Indoor Air Quality Monitor $149.99 Original price was: $149.99.$134.99Current price is: $134.99. Add to cart