Moved in recently to a condo which has an older he...

Moved in recently to a condo which has an older heating and cooling system, and was unable to change the filter myself. I knew with the pollen that the air was becoming unhealthy. You sent John within two days. He was prompt - polite - concerned with what I had to say - took his time and explained everything - not just changing the filter but maintenance also. Thank you so very much Pat Layton, Woodstock, Ga.