St John's Heating & Air
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"It's 100% Right or It's 100% Free"

Frequently Asked Questionstech.gif





What does HVAC stand for?


What do I get when I pay for a service call?


Is there anything I should check prior to calling for service?


What payment methods do you offer?


Should my system need refrigerant “Freon” every year?


What’s wrong with my system?


What certifications and training do your technicians have?





Why can’t a technician that can quote repairs on my unit quote me a new unit?


How do I know what size unit our house needs?


What is a load calculation?


What is a SEER Rating?


What is AFUE?


What is the average life expectancy of a system?


What brands do you install?


How long can I expect a new system to last?




What is the difference in a maintenance visit and a tune-up?


Why does my unit need preventive maintenance?


My furnace and air conditioner are both new. Do I really need to have them cleaned?


Why do I have to change my filters?


Why can’t I perform maintenance on my unit myself?


What CAN I do to help maintain my unit?