HVAC just came to check out my AC unit for the summer, everything was fine, he was here about 40 mins. No charge because I have an annual contract with them, but I dropped the guy a $20 and he acted like it was completely unexpected. Was it too much? Too little? I'm having tip anxiety.

Do you tip like home maintenance people or movers or whoever comes to take care of something for you?

Do you tip like home maintenance people or movers or whoever comes to take care of something for you?