Narrowest 40 gal gas WH?

I have a 30 gal Richmond Gas Water heater. I believe the diameter is the same as the current 29-30 gal at 16 1/8"

I don't have much width in the alcove I'm working with. Our new tub requires a 40 gallon, from what we've found. (At least w/ the 33 degree cold water temp in winter.) Otherwise I can't fill the tub before the hot water runs out.

So, what's the narrowest 40 gal available? I have some height available, it's the width that matters.

The narrowest I've found is one of the Richmond 40 gal models is 17 3/4"

Anyone know of a narrower 40 gal?

I would visit all the manufacturers and check their spec sheets on the different models. Thats the only way you'll find the thinest of the thin.\
Some manufacturers should be avoided though... I believe you've been here enough to know which ones...

heater

Once heaters were mandated to have better insulation, all of them got fatter and 18" might be the smallest you will find.

bradford white

the bradford will clock in as the skinniest

for a 40 gallon...you will find..

but I dont think it will fit either