I just wanted to give you an update after 7 winters using the wood boiler and solar tubes you installed and wanted to tell you again how happy I am with all of it – particularly when I look at the gauge on the oil tank and see that we don’t have to fill it! Seriously, we last filled the oil tank on November 1, 2011 and it is still over 1/4 full. For 2 winters and a summer, we only used 200 gallons of oil.