I'm saving up for a new water heater. I am not that well versed in the topic. There are two that I have been looking that I like so far. One is a "ultra low NOx" natural gas water heater. What are the main benefits of this style? I do not live in a area that requires this style of water heater, but if it is going to help me somehow down the road then I wouldn't mine investing in it now. Also one is 40,000 BTU and the other is 36,000 BTU. Would the larger BTU save me money down the road? The two that i am looking at are listed below;
Thanks in advance for all of your advice.