Triangle Tube 20-Gallon Water Heaters

Triangle Tube Smart 120 Indirect Water Heater 120-Gallon

Smart-120

Indirect Indirect 0.86

4.6 (90)

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Triangle Tube 20-Gallon Water Heaters: buyer's guide

Triangle Tube offers 1 20 gallon water heaters model in the lineup we track. This page is the Triangle Tube-specific cut of the broader 20-Gallon Water Heaters water heaters category — same product class, narrowed to the Triangle Tube catalog only.

About Triangle Tube

Triangle Tube — Indirect water heaters and boilers.

For the complete Triangle Tube lineup across all sub-types and capacities, see the Triangle Tube Water Heaters hub.

Triangle Tube 20-Gallon Water Heaters models we track

Triangle Tube Smart 120 Indirect Water Heater 120-Gallon (Smart-120) — Triangle Tube Smart 120 120-gallon tank-in-tank indirect — largest residential / light commercial. For 5-6+ person homes or larger applications. Lifetime warran...

Other 20 Gallon water heaters brands

If you're cross-shopping 20 gallon water heaters beyond Triangle Tube, the following brands also ship in this category:

About 20-Gallon Water Heaters water heaters

The 20-gallon water heater is the upper-tier point-of-use size — sized for single-occupant ADUs, pool houses, RV park-models, small cabins, and tiny homes. The 20G supports a full normal shower (5–7 minutes at 2 GPM) plus 1–2 hand-washes before recovery — adequate for 1-occupant whole-bathroom service.

Rheem Performance 20G Point-of-Use Electric (XE20P06PU20U0) — 6-year warranty, 240V, 30 GPH FHD.

Single-occupant ADUs / mother-in-law suites / garage apartments
Pool house bathrooms with daily use
RV park-model trailers
Small cabins in mild climates
Tiny homes with 1–2 occupants

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For the complete 20 gallon buyer's guide (all brands, full comparison framework), see the 20-Gallon Water Heaters category hub.

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