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Intellihot iQ751 Gen II - i Series - Tankless Water Heating Systems

iQ751 Gen II
Intellihot iQ751 Gen II - i Series - Tankless Water Heating Systems

Intellihot iQ751 Gen II - i Series - Tankless Water Heating Systems   

Our iQ Series floor-standing units deliver the highest capacity in the industry - up to 3 million BTUs - with no storage tanks required. Designed for very large-volume, commercial applications, these high-input units slash capital costs by up to 50% and decrease operational costs by up to 40% when compared to traditional tank-type systems. iQ751 delivers approximately 750,000 BTU/hr 


  • Masterless Cascading - Eliminate single-point failure with our patented Masterless Cascading technology.

  • Wi-Fi and 3G/4G Connectivity - Real-time monitoring of your Genn II unit is available through the unit’s 7” touch-screen - and accessible remotely via a mobile app. Each unit can be easily connected to your building’s Wi-Fi router or to Intellihot’s internet hub. 

  • Eliminate Mixing Valves & Lower Legionella Risks - With no storage tanks, there’s a lower risk for Legionella growth. By eliminating the need for mixing valves, this feature also reduces their associated unreliability and costs.

  • Competitive Turndown Ratio - Unparalleled gas savings with an industry leading turndown ratio, 100:1 for iQ3001, 66:1 for iQ2001, 50:1 for iQ1501, 33:1 for iQ1001, and 25:1 for iQ751.

  • Common Venting Capabilities - The iQ floor units transform common venting into smart-common venting. 

  • ASME-HLW Complaint - Suitable for applications managed by engineers, specifiers, and contractors. 

  • Guaranteed - Backed by a 10-year non-prorated heat exchanger warranty.


  • Minimum Input (BTU/hr) - 30,000

  • Maximum Input (BTU/hr) - 751,000

  • Maximum Output (BTU/hr) - 705,940

  • Thermal Efficiency - 94%

  • Dimensions H x W x D (inches) - 67.7 x 30 x 44.3

  • Weight (LBS) - 730 LBS 

  • Water Pressure Min/Max (PSI) - 30/160

  • Vent Size (Diameter) - 6"

  • NG/LP- (Maximum Static Gas Pressure Range) - 2.5" - 14" WC

  • Electrical (120V AC, 60Hz) - 120V AC, 60Hz Max 16 Amps

File Downloads

(Size: 35.7 MB)
V.1/ 082817iQ150128 thru 02070iQ150160)
(Size: 28.8 MB)
(V.2/ 021320iQ100142 or later)
(Size: 8.5 MB)
(for all Gen II units)
More Information
SKU iQ751 Gen II
MPN iQ751 Gen II
Weight 975.000000
Manufacturer Intellihot
UPC 850007779689
Generic Product Category Tankless Water Heater
Voltage 120V
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