It wasn’t that long ago that boilers were single phase models.
The boiler was only able to operate at maximum capacity.
The boiler would kick in and blast at full speed until reaching the temperature setting on the thermostat. At that point, the boiler would shut down completely. The repetitive on and off cycling caused indoor temperature swings, wear and tear on components and excessive energy consumption. Eventually, the industry developed multi-phase boilers. These boilers 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 boilers featuring adaptable-speed technology. The smart technology enables the boiler to automatically adjust output to match the exact requirements of the home. The advanced engineering provides adjustments in tiny one percent increments somewhere between forty and one hundred percent capacity! Very rarely does the boiler need to operate at full capacity. Other than starting up the boiler for the first time when the outdoor swiftly drops, it can operate at a lower capacity. Running more often at lower speeds, the boiler uses less energy and deals with less strain. It doesn’t cause as numerous complications with overly dry air. Modern boilers offer the added benefits of wireless technology. With the addition of a smart thermostat, the system can be adjusted remotely from a computer, 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.