Hillandale hercules 20b multi fuel boiler stove works with your open vented central heating system to keep the whole house cosy it has 20kw output and will not only radiate heat around the largest rooms but will also power a central heating and hot water systemthe hercules 20b boiler stove is powerful robust and capable of performing the most demanding task this stove has been thoroughly tried and tested to withstand the harsh rigours of multifuel or wood firingcan also burn coal which is