Making the most of your coil boiler hot water system

If you've ever noticed your coil boiler hot water getting a bit lukewarm halfway through a shower, you're likely dealing with the quirks of a tankless coil system. These setups are super common in older homes, especially in the Northeast or places where oil and gas boilers are the kings of the basement. They're clever because they don't need a massive separate tank taking up floor space, but they also come with a unique set of "personality traits" that can be a bit frustrating if you don't know how to handle them. ...

May 15, 2026 · 7 min · Gabi Rosado