Drake Mechanical is now an authorized factory service center for Eternal Water heaters.  These water heaters are incredible.  Little to no pressure drop vs. a tankless, 20 year warranty residentially and endless hot water.  Now Eternal water heaters also meet the ultra low NOx standards that Drake Mechanical has met with the Rheem water heater for many years now.  Good for you and good for the environment and our winter smog here in the treasure valley!