Navien tankless flush and Lennox AC maintenance. Performed full maintenance on tankless. Cleaned all filters, condensation trap and flushed system. Tankless had very little buildup and is in great condition. AC is in great shape and cooling very well, found no problems with the system during maintenance. Outdoor unit had heavy buildup on it, this is not too much of a concern as long as we continue to perform yearly maintenance. Air filter at furnace is still very clean, will likely need replaced at next furnace maintenance.(x6670)