Lochinvar Knight Stainless Steel Natural Gas Boiler, 155000 Btu, High Efficiency, Wall-mount, 1in Water Connection, 1/2in Gas Connection, 3in Vent, Direct-spark Ignition, Smart System Digital Operating Control, Night Setback - WHN155

SKU: 107553
$4,082.56/ea Cargo Shipping Only
Save 49% · Retail: $7,960.00

   Available to Ship in 4-5 weeks

About the Lochinvar WHN155

The Lochinvar Knight WHN155 is a wall mount natural gas boiler engineered with innovative smart system features that enhance its abilities to provide more efficient performance and services in residential and commercial applications. It is equipped with the Smart System Digital Operating Control that has a multi-colored graphic LCD that displays the navigation dials, soft keys, and the Loch-N-Link USB programming that you can use to digitally set-up and control this gas boiler. It comes with 4 pump controls: the system pump with a parameter for continuous operation, boiler pump with variable speed control, domestic hot water pump, and the domestic hot water recirculation.

For safe and smooth water flow, the WHN155 natural gas boiler is engineered with low-water flow safety control and indication. Another smart feature is the domestic hot water prioritization that provides heat to the building, especially during colder seasons; delivering hot water that circulates through the heating system for kitchen and bathrooms. This boiler has the programmable system efficiency optimizers that include the SH night setback, DHW night setback, anti-cycling, outdoor air reset curve, ramp delay, modulation factor control, and the boost temperature and time. This boiler comes with an outdoor reset control with an outdoor air sensor that helps the boiler's temperature to regularly adjust based on the outdoor temperature conditions. It also prolongs the life of the boiler and helps you save up money!

This boiler is both user- and environment-friendly thanks to its modulating burner with up to 10:1 turndown. It features a low Nox operation which reduces the emission of nitrogen oxide. You'll be confident to use this water heater because it has a 95% DOE AFUE product efficiency rating and it is covered with a 5-Year limited parts warranty.

Lochinvar Knight has been a top producer of premium, high-efficiency boilers, and water heaters since 1919. The Lochinvar Knight WHN155 wall mount natural gas boiler is now available for purchase here, at Plumbersstock!


** Due to this product's considerable weight and size our current shipping costs could fluctuate. Please call 435-868-4020 for today's shipping rates.

Product Details

Manufacturer: Lochinvar
Product: Boiler
Color: Stainless
Modus Operandi: Natural Gas
Mount Type: Wall Mount
Vent Type: Direct Vent
Digital: Yes
Electrical Voltage: 120VAC, 60Hz
Height: 33-1/4"
Width: 18-1/2"
Depth: 19"
Vent Size: 3"
Connection Size: 1/2"
Connection Type: IPS
Other Info: ASME Certified
Energy Star Rated: Yes
BTU Rate: 155,000 BTU
Pressure Rating: 80 PSI
Capacity: 3-1/2 gal
Mpn # WHN155
Dimensions 19 " X 19 " X 33 "
Weight 166 lbs.

Product Features

  • Direct-Spark Ignition
  • Wall-Mount Bracket
  • Zero Clearances to Combustible Materials
  • 12-Year Limited Warranty
  • Multi-Color Graphic LCD Display with Navigation Dial and Soft Keys
  • Plus Domestic Hot Water Prioritization
  • Multiple Size Boiler Cascade
  • Lead Lag
  • Efficiency Optimization
  • Outdoor Reset Control with Outdoor Air Sensor
  • Programmable for Three Reset Temperature Inputs
  • Low-NOx Operation
  • Night Setback
  • DHW Night Setback
  • Anti-Cycling
  • Outdoor Air Reset Curve
  • Ramp Delay
  • Boost Temperature & Time
  • System Pump with Parameter for Continuous Operation
  • Boiler Pump with Variable Speed Pump Control
  • Domestic Hot Water Pump
  • DHW tank piped with priority in the boiler loop
  • Field Convertible from Natural to LP Gas
  • DHW tank piped as a zone in the system with the pumps controlled by the Smart System
  • DHW Modulation Limiting
  • Separately Adjustable Space Heat/DHW Switching Times
  • 0-10 VDC Input to Control Modulation or Set Point
  • 0-10 VDC Modulation Rate Output
  • 0-10 VDC Input to Enable/Disable call for heat
  • 120 VAC / 60 Hertz / 1 Phase Power Supply
  • Three Sets of Pump Contacts
  • 24 VAC Device Relay
  • Proving Switch Contacts
  • 30 psi ASME Relief Valve
  • Flow Switch Contacts
  • Alarm on Any Failure Contacts
  • Runtime Contacts
  • DHW Thermostat Contacts
  • 3 Space Heat Thermostat Contacts
  • System Sensor Contacts
  • DHW Tank Sensor Contacts
  • Outdoor Air Sensor Contacts
  • Cascade Contacts
  • 0-10 VDC BMS External Control Contact
  • PVC, CPVC, Polypropylene or SS Venting up to 100 feet
  • 0-10 VDC Boiler Rate Output Contacts
  • 0-10 VDC Variable Speed System Pump Signal Input
  • 0-10 VDC Signal to Control Variable Speed Boiler Pump
  • Modbus Contacts
  • Hours Running, Space Heating
  • Hours Running, Domestic Hot Water
  • Ignition Attempts
  • Last 10 Lockouts
  • Custom Maintenance Reminder with Contractor Contact Information
  • Installer Ability to De-activate Service Reminder
  • Factory Supplied Sidewall Vent Termination
  • Automatic Reset High Limit
  • Adjustable High Limit w/Manual Reset
  • Boiler Circulating Pump

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