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Tankless water heater tech
- Thread starter bgaidan
- Start date
ScottRS
Not @Rockstomper today
My current tankless came with several pages of schematics of how to set up a recirc loop, integrate a surge tank, intake/exhaust options and recommendations, etc. I'd recommend to dig into any that you're considering and download whatever manuals they offer (install, parts, troubleshooting, etc) and choose your water heater based as much on its support as on its specs. I'm on my second tankless now (first one went 16ish years) and you will eventually need the manuals and the spare parts support. May as well make sure you have them on the way in.
Our pantry and kitchen are fed by a gas-fired tankless that needs full flow for 4 seconds before it fires up, and it wouldn't fire up on the low flow of a recirc. pump. Between that + the 10 seconds it takes for hot water to reach the kitchen sink, we basically never used hot water there because we're not running the hot water for 15+ seconds just to make it hot.
So . . . I put a little 2.5 gallon electric water heater in under the kitchen sink. Hot water line coming from the tankless feeds that electric tank, so when the tankless kicks on, the electric heater doesn't have to work much if at all. Hot water at the kitchen sink is now instant, and it's been a game-changer for us.
Ignore the green arrows, that was to explain routing the discharge from the T&P valve.
Got 2 tanked gas water heaters we love, a gas tankless that's "meh" at best, and now a mini electric tank that works great (but will likely fail in a few years
)
So . . . I put a little 2.5 gallon electric water heater in under the kitchen sink. Hot water line coming from the tankless feeds that electric tank, so when the tankless kicks on, the electric heater doesn't have to work much if at all. Hot water at the kitchen sink is now instant, and it's been a game-changer for us.
Ignore the green arrows, that was to explain routing the discharge from the T&P valve.
Got 2 tanked gas water heaters we love, a gas tankless that's "meh" at best, and now a mini electric tank that works great (but will likely fail in a few years
)
clodhopper
Get off my lawn, punk!
Ummduh
Red Skull Member
A lot of the new tankless water heaters actually have small tanks in them.. i know navien was doing it, and another big name started doing it like 10 years back, and it was specifically to make recirc work better. They incorporated small tanks, like 1.5-2.5 gallons directly into the unit, fixed a lot of the issues being talked about in the last few posts.
Credit where it's due, Gots_a_sol made me do it:Link to product?
It was $175 when I got it on a "Prime days" deal, looks like it's $218 now
https://www.amazon.com/dp/B0148O658Y
For our application, the 2.5 gallon is perfect. Same system is also available in 4 and 7 gallon. Need to remember to service the anode ~yearly or expect it to eat shit in ~3 years because Chineseum.
Gots_a_sol
Red Skull Member
Credit where it's due, Gots_a_sol made me do it:
It was $175 when I got it on a "Prime days" deal, looks like it's $218 now
Amazon.com
For our application, the 2.5 gallon is perfect. Same system is also available in 4 and 7 gallon. Need to remember to service the anode ~yearly or expect it to eat shit in ~3 years because Chineseum.
Just a heads up, it's back down to 170 something for Black Friday