Tankless Water Heater Installation & Repair

When a hot tap opens, a flow sensor tells the unit to fire. Cold water passes through a heat exchanger, and the unit holds the temperature you set. When the tap closes, it shuts off. Nothing is kept hot in the meantime, which is where the energy savings come from, and why a properly sized unit does not run out.

Tankless suits homes with growing hot water demand, owners planning to stay a long time, and anyone short on floor space, since the unit mounts on the wall. It suits less well where the budget is tight, the gas line is far from the unit, or the house has no practical place to vent it. A standard tank is still the right answer in plenty of homes, and we will say so. For the full comparison, see [tank vs. tankless](/water-heaters).

A conversion is more than swapping the heater. Most tankless units need a larger gas line than a tank does, new venting to the outside, a condensate drain for condensing models, power for the controls, and a mounting spot that works. Some units are rated for outdoor mounting, which can solve a space problem. We look at all of it before quoting, because each one changes the price.

Sizing is by flow rate, not tank gallons. We add up what you run at the same time, such as a shower, a dishwasher, and a laundry load, and choose a unit that can heat that much water at the temperature rise your incoming water needs. We install Navien and Rinnai, and can service most other brands.

Upkeep matters. Triangle municipal water is moderately hard, and scale builds inside a tankless heat exchanger. Descaling once a year keeps it efficient and prevents the error codes and reduced flow that scale causes. Skipping it is the most common reason a tankless unit gives trouble early.