When it was time to replace the gas furnace in my home, I should have done a lot more research. Instead, I simply called a local HVAC company and trusted them to handle the job. I was thrilled they provided a free estimate. A technician came to my house, inspected my outdated furnace, took some measurements and recommended a furnace from a leading manufacturer. I was impressed with the AFUE rating and the many features. The new furnace links to wifi, allowing a smart thermostat and remote access. It also handles zoned heating, allowing me to set customized temperature in various rooms. I figured that I’d save a tremendous amount on monthly utility bills. Avoiding heating empty rooms combined with the way more efficient furnace seemed like a great way to recover the initial investment. Unfortunately, the HVAC technician was rather lazy. Instead of completely an accurate assessment of the heat gain/heat loss of my home, he simply recommended a furnace of the exact same size as the old one. Since installing the original furnace over twenty years ago, we’ve made some improvements to our home. We’ve installed new windows and exterior doors. We’ve added insulation to walls, ceiling and the attic. Because of these upgrades, our home is far tighter and more energy efficiency. Our heating needs could easily have been handled by a smaller furnace. A smaller heating units costs less to purchase, install, operate and maintain. This oversized furnace reaches the optimum indoor temperature too quickly. It never reaches maximum energy efficiency before shutting down, and costs quite a bit to operate. The continual on and off cycling creates unpleasant temperature fluctuations. Plus, it places greater wear and tear on components. I expect the furnace to not last as long and succumb to more repairs.