It wasn’t that long ago that furnaces were single stage models. The heating system was only able to operate at maximum capacity. The furnace would kick in and blast at full speed until reaching the temperature setting on the thermostat. At that point, the furnace would shut down completely. The repetitive on and off cycling caused indoor temperature fluctuations, wear and tear on components and excessive energy consumption. Eventually, the industry developed multi-stage furnaces. These heating systems were able to operate at low and high speed. This improvement helped to maintain a more consistent temperature and increase energy efficiency. Today, there are furnaces featuring adaptable-speed technology. The smart technology enables the furnace to automatically adjust output to match the exact requirements of the home. The advanced engineering provides adjustments in tiny one percent increments anywhere between forty and one hundred percent capacity. Very rarely does the furnace need to operate at full capacity. Other than starting up the heater for the first time when the outdoor suddenly drops, it can operate at a lower capacity. Running more often at lower speeds, the furnace uses less energy and deals with less strain. It doesn’t cause as many issues with overly dry air. Modern furnaces offer the added benefits of wireless technology. With the addition of a smart thermostat, the system can be adjusted remotely from a laptop, tablet or smartphone. An independent thermostat in each room provides for zone control. Targeting individual rooms significantly increases energy saving potential, trims running costs and improves comfort. There is less impact on the environment.