Comparing tankless brands
Rinnai, Navien or Rheem? Compare how each handles venting, recirculation and fuel before an installer quotes one.
Rinnai
Rinnai makes condensing and non-condensing gas units in indoor and outdoor versions, with some models offering built-in recirculation. Like any tankless unit, a Rinnai is sized by flow rate and needs the gas line and vent to match.
Installers tend to stock parts for a few brands, so check which ones they support.
Navien
Navien is known for condensing units that vent through PVC, which can simplify conversions where stainless venting would be hard to run. Several models include a small buffer tank and recirculation options.
Rheem
Rheem sells gas tankless units and an electric line, which suits homes without gas. Rheem parts are widely stocked.
Leaning toward one brand? Have an installer confirm it fits.
Call (832) 783-9416Choosing
Brand matters less than these:
All brands need yearly descaling with moderately hard water. The continuous water heater guide on the home page covers sizing.
Recirculation
In long, single-story layouts, hot water can take a minute or more to reach the far bathroom. Some Rinnai and Navien models offer built-in recirculation that keeps hot water closer to the taps, and add-on pumps work with most brands.
Recirculation uses some energy, so timers or on-demand buttons help. It is worth asking about if you live in a spread-out home in Houston, TX.
Quick compare
Wide range of indoor and outdoor gas units; some with built-in recirculation.
Condensing units with PVC venting; some with a small buffer tank.
Gas and electric lines; parts widely stocked.
Brand questions
The one sized and installed correctly for your home, from a brand your installer services.
No. This is a referral service, not a dealer.
Yes, about once a year with Houston water.
Somewhat. Condensing units need PVC venting and a drain; non-condensing need stainless venting.
You're put through to a local installer who works on the brand you pick.
Name the brand you have in mind, and we'll put you through to a local installer in Houston, Texas.
