AO Smith Cyclone Xi 50-Gallon Commercial Gas Water Heater (FCG-50)

Model FCG-50
4.3/5 from 120 ratings
from Check current price
Price as of May 2026
Check Price on Amazon
Free shipping with Amazon Prime · 30-day returns
Btu
76000
Venting
Atmospheric
Fuel Type
Natural Gas
Tank Type
Commercial
Energy Factor
0.85
Warranty Years
3

AO Smith Cyclone Xi 50-Gallon Commercial Gas Water Heater (FCG-50) Review

The AO Smith Cyclone Xi 50-Gallon Commercial Gas (FCG-50) is a smaller-capacity Cyclone for commercial-residential crossover applications. The "FCG-50" identifies the 50-gallon variant in the Cyclone commercial line.

Specs: 50 gallons stored, 100,000 BTU input (lower than 199K BTU larger Cyclone variants), UEF 0.97 condensing, 200-gallon FHR, 8-year tank warranty. Power-vent PVC venting. Cyclone heat exchanger uses spiral flow paths.

The Cyclone Xi 50-gallon serves light commercial applications (very small restaurants, single-bay salons) or large residential households where standard 50-gallon would be tight. UEF 0.97 is among the highest in the gas tank category.

About $2,800 unit, $4,200-$5,500 installed depending on venting work. Right buyer: commercial-residential crossover with 50-gallon capacity sufficient.

Full Specifications

Brand
AO Smith
Model Number
FCG-50
Btu
76000
Venting
Atmospheric
Fuel Type
Natural Gas
Tank Type
Commercial
Energy Factor
0.85
Warranty Years
3
Capacity Gallons
50
First Hour Delivery
140

Similar Water Heaters

Rinnai

Rinnai RU199iN Sensei Tankless Water Heater

199000 Natural Gas Tankless
Check current price
4.8
View Details
Rheem

Rheem Marathon Lifetime 50-Gallon Electric Water Heater

4500 Electric Tank
Check current price
4.8
View Details
Triangle Tube

Triangle Tube Smart 80 Indirect Water Heater 80-Gallon

Indirect Indirect 0.88
Check current price
4.7
View Details