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Lochinvar Knight WHN110 89000 BTU High Efficiency Wall Mount Boiler Natural Gas

Brand & Part #: Lochinvar WHN110

Our SKU #: locwhn110

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Description For Lochinvar WHN110

Helpful Information

Material WHL110 has been replaced by WHN110

The KNIGHT Wall Mount, engineered with Lochinvar’s exclusive SMART SYSTEM control and an array of other innovative features is far ahead of any heating boiler in its class. It promises and delivers ultimate ease of installation and maintenance. With up to 99% thermal efficiency, low-NOx emissions and a fully modulating burner, it is the best ”green choice” for today’s environmentally focused market.

Seven modulating/condensing stainless steel KNIGHT Wall Mount boilers are available with 55,000–399,999 Btu/hr inputs in a space-saving wall-mounted design. All are equipped for direct-vent installation with air intake and exhaust runs up to 100 feet using PVC, CPVC, Polypropylene or AL29-4C vent materials. This range of choices is ideal for residential or light-duty applications such as small hotels, schools and office buildings. For higher-demand applications, up to eight KNIGHT Wall Mount units can be installed utilizing the built-in cascading sequencer to deliver up to 3.2 million Btu/hr heating capacity. The new KNIGHT Wall Mount Boiler reflects Lochinvar’s constant commitment to providing all the options you need to serve every application.


Standard Features

Energy Star Qualified
96% DOE AFUE Efficiency
Modulating Burner with 5:1 Turndown

  • Direct-Spark Ignition
  • Low-NOx Operation
  • Field Convertible from Natural to LP Gas

ASME Stainless Steel Heat Exchanger

  • 30 psi ASME Relief Valve

Vertical & Horizontal Direct-Vent

  • PVC, CPVC, Polypropylene or SS Venting up to 100 feet
  • Factory Supplied Sidewall Vent Termination

Smart System Control
Condensate Trap
Other Features

  • Automatic Reset High Limit
  • Adjustable High Limit w/Manual Reset
  • Boiler Circulating Pump
  • Wall-Mount Bracket
  • Zero Clearances to Combustible Materials
  • 12-Year Limited Warranty




Smart System Features

SMART SYSTEM Digital Operating Control

  • Multi-Color Graphic LCD Display with Navigation Dial and Soft Keys

Three Boiler Setpoint Temperature Inputs

  • Plus Domestic Hot Water Prioritization

Built-in Cascading Sequencer for up to 8 Boilers

  • Multiple Size Boiler Cascade
  • Lead Lag
  • Efficiency Optimization
  • Outdoor Reset Control with Outdoor Air Sensor
  • Programmable for Three Reset Temperature Inputs

Programmable System Efficiency Optimizers

  • Night Setback
  • DHW Night Setback
  • Anti-Cycling
  • Outdoor Air Reset Curve
  • Ramp Delay
  • Boost Temperature & Time

Three Pump Control

  • System Pump with Parameter for Continuous Operation
  • Boiler Pump with Variable Speed Pump Control
  • Domestic Hot Water Pump

Domestic Hot Water Prioritization

  • DHW tank piped with priority in the boiler loop
  • 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

Building Management System Integration

  • 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

Access to BMS Settings through Graphic LCD Display
High-Voltage Terminal Strip

  • 120 VAC / 60 Hertz / 1 Phase Power Supply
  • Three Sets of Pump Contacts

Low Voltage Terminal Strip

  • 24 VAC Device Relay
  • Proving Switch Contacts
  • 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
  • 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

Time Clock
Data Logging

  • Hours Running, Space Heating
  • Hours Running, Domestic Hot Water
  • Ignition Attempts
  • Last 10 Lockouts

Maintenance Reminder

  • Custom Maintenance Reminder with Contractor Contact Information
  • Installer Ability to De-activate Service Reminder

Low-Water Flow Safety Control & Indication
Password Security
Customizable Freeze Protection Parameters


Fuel Type: Natural Gas
Efficiency: 96%
System Type: Hydronic (Water)
Features: Condensing

Direct Vent

EI/Spark Ignition

Wall Mounted
Depth (Inches): 19"
Vent Size: 3"
BTU Output: 89000
BTU Input: 110000
Boiler Type: High Efficiency
Width (Inches): 18-1/2"
Height (Inches): 33.25
Application: Heating
Water Connection: 1"
Gas Connection: 1/2"

Lochinvar WHN110 is also known as locwhn110 , whl110

Lochinvar Knight WHN110 89000 BTU High Efficiency Wall Mount Boiler Natural Gas

Image shown may differ from actual product appearance especially finish and color.

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Product Details

brand Lochinvar
Fuel Type Natural Gas
System Type Hydronic
Venting Type Direct Vent
Installation Type Wall Mount
BTU Output 65,000 - 100,000
BTU Input 110000
Water Connection 1 Inch
Vent Size 3 Inches
Gas Connection 1/2 Inch
Efficiency 91% +
Boiler Type High Efficiency
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