Honestly? Yes, absolutely. If you have hard water (and 85% of American homes do), a conditioner is like renter’s insurance for your heater. It’s cheap, simple, and it works.
The catch? Not all conditioners are created equal. Get one that matches your water flow rate. Too small, and it does nothing. Too big, and it’s overkill. Read reviews, or ask a plumber who isn’t trying to sell you a softener.
One last quirky fact: some conditioners are rated for “whole house use.” They can protect your coffee maker, ice maker, and washing machine too. So you’re not just saving your heater—you’re saving all your thirsty appliances. A tiny device with a big, heroic job.
Now go check your water hardness. Your tankless heater is waiting for its bodyguard. You’ve got this.
