The Caldaie PK 20 boiler from La Nordica-Extraflame is manufactured using the most advanced technology. This boiler heats the whole house with excellent thermal efficiency, low pellet consumption and total respect for the environment. People sometimes think that burning wood is very polluting. This is true of old, traditional wood-fired boilers, where combustion is not controlled, but it doesn't apply to La Nordica-Extraflame's high-tech products, which are designed to burn pellets almost perfectly. These results have been achieved thanks to the introduction of various technologies, such as separate microprocessor control of primary and secondary air. Greater efficiency, lower emissions, better performance, big financial savings. This Caldaie PK 20, with an output of 20 kW, lets you easily heat a living space of up to 573 m3. Efficiency is around 93%. WIFI STANDARD