After LBA installed a new tankless hot water system I learned the benefits included with a recirculating system on this particular Rinnai model. I received a quote, but no details of what was included in the quote. Over a period of days I talked with a handful LBA technicians about the details of what was included in the quote, but there was one question none could answer. Finally, I received a call from senior technician Chad who answered my question. I told him with that question being answered I was ready to accept the proposal. Chad. Thank you so much.