Brian does an amazing job and his prices are very fair it’s hard to find an honest person it seems in the plumbing business, but brian is a straight shooter highly recommend! Timer and thermostat supplied for / controllability. There are a couple of well-respected biomass boiler manufacturers - eta and herz - that are located in germany based on our research. I've used this company twice at two different residences they have been great! Thank you for your interest in this question because it has.