Noritz NCC300DV-NG Indoor Direct Vent Commercial Condensing Natural Gas Water Heater

Product Description

The Noritz NCC300DV-NG is an indoor direct vent commercial condensing natural gas water heater built for demanding, high-volume applications. Designed for commercial environments, this unit delivers a broad BTU input range of 15,000 to 300,000 BTUh in a single unit, and when linked in a multi-system configuration of up to 24 units, the combined input can reach up to 7.2 million BTUh. HVAC and plumbing professionals will appreciate the 20:1 turndown ratio, which ranks among the best available in commercial tankless water heating. This wide modulation range allows the unit to match output precisely to demand, improving energy efficiency and reducing fuel costs across variable-load conditions. The NCC300DV-NG achieves up to 97% thermal efficiency in fully condensing operation, making it a strong choice for facilities focused on energy performance and operating cost reduction. The unit measures 18.9 inches wide, 32.7 inches tall, and 14.2 inches deep, allowing wall-mounted installation in tight mechanical rooms where space is limited. Venting flexibility is a core advantage of this model. The direct vent configuration is compatible with 4-inch Schedule 40 and Schedule 80 PVC and CPVC pipe, polypropylene pipe, and 5-inch stainless steel with an adapter. Output temperature is adjustable from 100 degrees Fahrenheit to 185 degrees Fahrenheit using the included remote thermostat, giving technicians precise control over hot water delivery for a wide range of commercial uses. Flow capacity ranges from 0.5 to 13.2 gallons per minute. The heat exchanger uses K-grade copper for the primary section and austenite stainless steel for the secondary section, pairing durability with corrosion resistance. Direct electronic ignition starts the unit reliably without a standing pilot. Built-in safety devices include a flame sensor, burner sensor, overheat prevention device, lightning protection device, freeze protection, and a neutralizer overfill feature. WiFi capability is included for remote monitoring and system management. The unit is ANSI Z21.10.3 and CSA 4.3 certified. Multi-unit linking is supported through an optional 2-unit Quick Connect or a multi-unit System Controller for installations requiring greater output capacity.

• 20:1 turndown ratio with a BTU input range of 15,000 to 300,000 BTUh for flexible load matching
• Up to 97% thermal efficiency in fully condensing operation, reducing natural gas consumption in commercial settings
• Compatible with PVC, CPVC, polypropylene, and stainless steel venting materials for installation flexibility

Product Highlights

The Noritz NCC300DV-NG combines a compact footprint with high BTU output, broad venting compatibility, and industry-leading turndown ratio, making it a reliable choice for commercial hot water applications that require efficiency, flexibility, and scalability.

Product Information

Standard Information

• Brand: NORITZ
• Manufacturer Part Number: NCC300DV-NG

Technical Specifications

• Unit Type: Indoor Direct Vent Commercial Condensing Water Heater
• Fuel Type: Natural Gas
• Gas Consumption: 15,000 BTUh minimum to 300,000 BTUh maximum
• Thermal Efficiency: Up to 97%
• Turndown Ratio: 20:1
• Flow Rate Capacity: 0.5 to 13.2 gallons per minute
• Temperature Range: 100 to 185 degrees Fahrenheit
• Unit Dimensions: 18.9 inches wide x 32.7 inches tall x 14.2 inches deep
• Heat Exchanger Materials: K-grade copper (primary), austenite stainless steel (secondary)
• Venting Compatibility: 4-inch Schedule 40 and 80 PVC and CPVC, polypropylene, 5-inch stainless steel with adapter
• Ignition Type: Direct electronic ignition
• Multi-System Capacity: Up to 24 linked units
• Certifications: ANSI Z21.10.3, CSA 4.3
• Warranty: Five-year limited heat exchanger warranty for commercial use, five-year limited parts warranty, one-year reasonable labor