Whirlpool 50-Gallon Natural Gas Water Heater

The Whirlpool 50-gallon Natural Gas water heater is a residential-grade tank sold primarily through Lowe's, where Whirlpool is the house brand for water heaters. The unit itself is manufactured by AO Smith — Whirlpool licenses the brand for water heater distribution while AO Smith builds the actual hardware to AO Smith's specifications. Functionally, the Whirlpool 50-gallon NG is an AO Smith ProMax or Conservationist-equivalent unit with a different paint job and badging.

Specs: 40,000 BTU input, UEF 0.58–0.62 depending on sub-model, 81-gallon first-hour rating typical, 6-year tank and 6-year parts warranty. Atmospheric vent through B-vent. Standard residential gas control with electronic ignition, magnesium anode rod, polyurethane foam insulation.

Because the underlying unit is AO Smith-built, the engineering reliability and parts availability are similar to AO Smith's mainstream lines. Parts ordering goes through AO Smith's network with the unit identified by the Whirlpool model number; this works fine in practice but occasionally confuses Lowe's-purchasing homeowners who expect to order from a "Whirlpool" parts portal that does not exist.

Right buyer: Lowe's-channel shoppers replacing an existing 50-gallon gas tank. Whirlpool brand recognition is the primary draw — buyers tend to associate the brand with their kitchen appliances and assume the water heater carries the same quality. That assumption is approximately correct (AO Smith build quality), but the warranty length is below the premium tier — Rheem Performance Platinum's 12-year warranty makes it the better long-term economic choice for primary residences.

About $649 at Lowe's, $1,400 installed. The choice between Whirlpool and the AO Smith Conservationist GCR-50 (essentially the same unit with different branding) usually comes down to whichever is in stock at the local store or on sale.