The wonderful world of natural gas.  Seriously – I love the stuff.  Gas radiators, gas stove, gas water heater – tankless.  Yes, the water heater was more expensive than a traditional one.  Love it.  Love it even more when my EPP (Equal Payment Plan) drops $77/mo.  A warm winter, a new tankless waterheater and a bit of added weatherstripping (with a whole lot to go, believe me…) savings with no effort.  I do attribute a good deal of it to the drop in the cost of natural gas, but I also strongly endorse the Rinnai tankless water heater.