[mackal]

All of these sort of things are just based on hours used. It's like looking at your hot water heater warranty and replacing it when it's over (I live an an area where the PPM of the water is rather high and hot water heater warranties are basically calibrated for water like mine, so we do have to replace them on warranty expiration, most places you at least get a few years or double)

[bluefirebrand]

> It's like looking at your hot water heater warranty and replacing it when it's over

Why would anyone do that? Seems like a waste of a hot water heater that probably has a lot of life left.

People that do this probably throw out food the moment it hits the best before date too.

[dylan604]

Changing a hot water prematurely is probable less expensive than having one blow the bottom out and flood whatever area it is in. I don't have a basement, so my central unit and water heater share a utility closet in the hallway sharing a wall with a bedroom. It's a pretty bad design flaw, as during the summer of 110°+ temps, it is unnecessarily heating the house. IR temp shows that shared wall from the bedroom side over 90° radiating into that bedroom. </rant>

[mythhabit]

That's not so much a design failure of the house, as it is a heater that is not sufficiently insulated.

[dylan604]

Maybe, but it's a rental, so only some much to be done about that. So much was defined by me as buying a $30 roll of insulating whatever it is that then got stapled to the interior wall of the closet. Took the thermal temp down 15° on the bedroom side of the wall.

[genewitch]

also they make hybrid water heaters that will cool whatever space they are in while they heat the water using a heat pump on top