Continuous hot water
Compact size and weight allows for one person installation
OM-128HH has 1/2 inch drain and 3/4 inch pressure valve connections on the left side and 1 1/4 inch connections for supply and return on the right side
Choice of direct vent or chimney vent
Cold start capability
Very quiet and reliable operation
Heat exchanger has easy access for servicing from the top without having to disconnect any water pipes
New temperature fuse that attaches to the heat exchanger, to cause shut down in case the top of the heat exchanger gets too hot
New timing sequence for the photo eye.
Stainless steel heat exchanger and cabinet
Adjustable temperature differential for cycling control
Limited 10 YEAR WARRANTY