Air changes per hour, abbreviated ACPH or ACH, or air change rate is a measure of the air volume added to or removed from a space (normally a room or house) divided by the volume of the space.

Vivek, being an engineer at heart is obsessed with technology and related products.
He believes in building products that are simple and elegant to use. Being from a B2B segment in the past, he is still learning the ropes and thoughts that go behind making a good and effective B2C product.