I've had this tankless water heater for about a year now, and overall it's been pretty good—hot water on demand, no waiting around, you know, the usual perks. But lately I've noticed my gas bill creeping up more than I thought it would. I mean, wasn't the whole point of going tankless supposed to be saving energy and money?
Anyway, I did some digging online and found out about descaling and adjusting temperature settings. So last weekend I bought one of those descaling kits and ran it through. Honestly, the water does seem hotter quicker now, but I'm not sure yet if it'll make a noticeable dent in my gas usage.
Has anyone else tried descaling or tweaking their heater settings? Did it actually help lower your bills or am I just imagining things here? Curious if there's other tricks or tips out there that actually work.
You're definitely not imagining things—descaling can make a noticeable difference. I did mine about six months ago, and while it wasn't a huge drop, my gas bill did ease up a bit afterward. Also, lowering the temp setting slightly helped more than I expected. Might be worth experimenting with that if you haven't already... tankless heaters can be finicky sometimes, but small tweaks do add up over time.
Descaling definitely helps, but if you're still seeing higher-than-expected gas usage, you might wanna check your venting setup too. I've seen a few installs where improper venting caused the heater to cycle more often, burning extra gas without really needing to. Had one client whose vent pipe was slightly undersized—nothing major, but enough to make the heater work harder than it should. Swapped it out for the right size and boom, noticeable difference in gas consumption.
Also, double-check your gas pressure settings. Sometimes the factory defaults aren't ideal for every home setup. A quick adjustment there can smooth things out nicely. Tankless units are great, but they're kinda like cars—small tweaks and regular maintenance go a long way.
Good points on venting and gas pressure. When I installed mine, I noticed something similar—higher gas usage than what I was expecting, even after descaling. Turns out the issue wasn't venting or pressure in my case, but actually the temperature setting itself.
I originally had the heater cranked up pretty high (around 130°F) thinking hotter water meant less overall use since we'd mix it with cold anyway. But apparently, tankless units work harder and burn more gas to reach those higher temps quickly. Dropping it down to around 120°F made a noticeable difference in gas consumption without sacrificing comfort.
Also, if your unit has a recirculation feature, check how often it's cycling. Mine was set to run way too frequently by default, constantly reheating water in the pipes even when we weren't home. Tweaking that schedule helped cut down on unnecessary cycles and saved some gas.
Just another angle worth checking out...
Mine was set to run way too frequently by default, constantly reheating water in the pipes even when we weren't home.
Good call on the recirculation settings—I overlooked that myself at first. When I installed ours, I left everything on factory defaults, figuring they'd be optimized already. Gas bills were higher than expected for months before I realized the recirc pump was running way more than necessary. Adjusting the schedule made a noticeable difference.
Also, just a quick heads-up: if you're tweaking venting or gas pressure, double-check your manufacturer's specs. Had a coworker who messed around too much without verifying clearances, ended up with combustion issues. Better safe than sorry, especially when dealing with gas.
Descaling helped us a bit, but honestly, temperature adjustment and dialing in the recirc cycle made the bigger dent. Worth doing both though, in my experience.