When my furnace started showing signs of failing, I began looking into the different manufacturers and models available. Because a new heating system is such a big investment, I was determined to be smart about my decisions. I wanted to make the most of the opportunity. There are forced air furnaces that offer a 98% AFUE rating. These advanced systems feature variable-speed technology that allows the unit to automatically adjust speed to meet changing demands. Along with minimizing energy consumption, the furnace operates more quietly, provides more even temperature and does a good job filtering out air contaminants. As I researched the various options, I realized that most of the top-of-the-line models are similar. They offer similar efficiency ratings, features and manufacturer’s warranties. I learned that one of the most important aspects of furnace installation is sizing. It’s essential that the HVAC contractor complete a proper heating load calculation. A heater that isn’t big enough will work non stop and fail to keep up with demand. The wear and tear will shorten service life. A heater that is oversized will heat up the home so quickly that it won’t achieve peak efficiency. The constant start up and shut down will compromise reliability and longevity. It’s also vital that the contractor follow proper installation procedures and make sure that the ductwork is effectively sealed. I read lots of customer reviews before choosing an HVAC contractor. I found a company that is fully licensed, insured and provides 100% satisfaction guarantee. They offered low interest financing and handled the start to finish installation project very swiftly and professionally.