re: Replacing hot water heater in attic

Plumber just this morning finished replacing my busted 10 year old electric 50 gallon in my attic with an outdoor gas 10gpm non-condensing tankless on the opposite side of the house.

Takes about 3 seconds to ignite and fire. It's across the house from my kitchen and utility room, and it took 48 seconds for my 1.8 gpm sink faucet to get hot, which is about 30 seconds more than it did with the tank. After brief testing this morning, set at 130 degrees to really see what it can do, I ran most of my showers and faucets full blast without much pressure drop. It bottomed out when i turned on the tub filler, but at that point I was pushing around 12 gpm.

Also something to note, the rated gpm is calculated at a set temperature of 100 degrees for southern climates, and bumping it up to the normal 120-125 will decrease the max flow. I believe the manual says mine is 6.7 gpm max at 125 degrees.

It's different and will take some getting used to, but it'll be nice to have unending hot water.

Wish I could have gone with a condensing unit, but the condensate drain and neutralizing requirements weren't practical, even with an outdoor installation. Also wish I could have gone with a unit that has a built in recirc system, but my tank busted and I didn't have the luxury of time to order a preferred unit.