You can skip the buffer tank too, if cost is an issue.Here is a link to the boiler: <a href="http://www.peerlessboilers.com/Products/ResidentialBoilers/PeerlessPinnacleOil/tabid/115/Default.aspx#dnn_productratingsand">http://www.peerlessboilers.com/Products/ResidentialBoilers/PeerlessPinnacleOil/tabid/115/Default.aspx#dnn_productratingsand</a> the buffer tank: www.boilerbuddy.com 0 ?? ?? billtwocase Posts: 2,062Member ????????? October 2014 BC, do not know how you come up any #'s?