Water heaters are changing. Again. That is to say that efficiency requirements for storage water heaters are increasing. For the most part, standard storage heaters from 40 - 50 gallons will remain the same, as they already meet the minimum efficiency. However, anything above 50 gallons will require increased effiency. As usual, that will result in a price increase. Even more, water heater manufacturers will use the new requirement to increase the price of all water heaters. Even those that already meet the efficiency standard. I've been told to expect a 15% increase by April 16th, 2015. For a standard install that will be an increase of $150 approximately. So, if you're water heater is near the end of it's life, consider a replacement before April 16th, 2015. Of note, all tankless water heaters already meet the efficiency standards. And, provide endless hot water.