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Noritz NRC661 6.6 GPM Indoor Liquid Propane Condensing Tankless Water Heater

by Noritz
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Original price $1,863.23 - Original price $1,883.18
Original price
$1,863.23 - $1,883.18
Current price $1,863.23


Get energy-efficient, endless, hot water at a low installation cost.

Noritz's Energy Star rated NRC661 is the newest efficient condensing heater with a half inch gas line. It features the same energy-saving condensing technology used with other eco-TOUGH Series heaters. The NRC661 features an Energy Factor of 0.93 for LP. These ratings are almost 10 points higher than those of a comparably sized, conventional tankless heater, and about 30 points higher than standard, tank-type gas-fired water heaters.

With a maximum input of 120,000 BTUs per hour, using a 1/2 inch gas line up to 120' long. A more accurate interpretation of the National Fuel Gas Code allows the use of the gas pipes with a smaller-diameter for inputs of up to 174,000 BTUh, for as long as the water column pressure in the unit inlet is at a minimum eight inches.


Home Size Southern climate: 2 baths
Northern climate: 1.5 baths
Unit Dimensions 20.5” (H) x 13.8” (W) x 6.7” (D)
Weight 39 lbs.
Gas Consumption Min: 15,000 btuh
Max: 120,000 btuh
(NG & LP) Natural Gas/Propane
Capacity Range 0.5-6.6 Gal./min.
Energy Factor 0.91 (NG) 0.93 (LP)
Thermal Efficiency 93%
Temperature Settings 100-140°F (In 5°F intervals) (9 Options)

Technical specifications
Install manual
Owner's manual