Is there any difference in what system we install

Eight years ago, our wife & I bought a brand new HVAC unit.

It was during a summer time heat wave when the systems stopped laboring. We were actually blissful at the time, because both of us bought the most energy efficient component that our money could buy. We bought an energy-efficient HVAC method that was rated with a 14 SEER. The SEER rating is an energy efficiency rating that tells whether or not a component will take a lot of electricity to run. At the time both of us bought the 14 SEER system, it was state-of-the-art. We paid more than our neighbors, & both of us even got a free media air cleaner with the purchase. At the time of installation, both of us could choose between a free media air cleaner or a free digital control unit. We did not end up with any free stuff this time around, however both of us did receive a rebate from the electric corporation. My wife & I found out that a 14 SEER rated method is not the most energy efficient component on the market. This time around, both of us looked through our chances & bought an 18 SEER rated HVAC unit. We had the new equipment installed 3 months ago, & I can already tell there is a big difference between the energy efficiency rating. The new component doesn’t run as frequently as the aged 1, & both of us are spending less money on our energy costs. Our aged bi-weekly utility expenses were around $300. Last month, our total bill was only $225. If both of us continue to save a heap of money every month, the new HVAC equipment will pay for itself. It would be great if this method lasts longer than 8 years.