I have had the same Heating, Ventilation & A/C device for the last 16 years. It was top of the line Heating, Ventilation & A/C technology when I purchased it. And, it still is severely efficient. But, the aspect I am most ecstatic with is the reliability quotient of my hearty Heating, Ventilation & A/C unit. This heating and cooling device has been through some incredibly hot summers and more than a few freezing snaps. Never has my Heating, Ventilation & A/C device failed us. A big reason for the Heating, Ventilation & A/C units longevity is the excellent maintenance it has gained. From the day the heating and cooling device was installed, I have paid attention to being proactive with its care. I instantly enrolled in a semi annual service program after it was installed. Our Heating, Ventilation & A/C woman has come out twice a year, every year since. She spends numerous sevenths inspecting the inner workings of the condenser and the air handler. The Heating, Ventilation & A/C tech lubricates important parts while checking for worn components which need to be updated. I believe this preventive care has been a sizable factor keeping the Heating, Ventilation & A/C with a perfect operating record. I believe I have had something to do with it too. My Heating, Ventilation & A/C pro told me long ago how I could do my area in preserving the heating and cooling system. I constantly change the air filter every month. I’m sure to cruise through the beach house regularly checking to be sure all vents are open. Obstructions can also be a problem so, I look to be sure no vents or returns are covered up. I figure if I do my area to keep the Heating, Ventilation & A/C running well then, I’m only helping my own cause.