I like Rheem heaters. Forget about length of warranty, you get the same heater for more money to get an extend warranty. If the heater fails anywhere near the end of the warranty period, it is worthless anyway. The only plus for buying for HD is if you have an immediate problem, you are dealing with a local store and not an on-line dealer. The OL dealer would probably make good on a replacement, but you'd have the hassle of sending the unit back and waiting for a new one. Not worth the $25 IMHO.