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Weil-Mclain 383-900-155 ECO Tec 150-H 150 Input MBtu 95% AFUE Natural Gas Condensing Heat Only Water Boiler Series 2 - Direct Vent Or Direct Exhaust


In Stock. Ships in 1-7 Business Days.

Retail : $4,455.00 - $935.55 =
$3,519.45 You Save (21%)

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Product details

Weil-McLain’s newest, premium residential gas boiler. Designed to be easy to install and service, with a long-lasting firetube heat exchanger and our next generation, easy to use, color touchscreen control. The ECO Tec is also available in a combi version, generating hot water output up to 5.4 GPM, making it the first premium residential combi from the biggest name in boilers.

  • Heat only sizes: 80, 110, 150 , 199 MBH
  • Combi sizes: 110,150,199 MBH (up to 5.4 GPM)
  • Wall or floor base mounting options
  • Stainless steel firetube heat exchanger design
  • Unity 2.0 control with color touch screen




  • Stainless Steel Firetube Heat Exchanger
  • Non-Metallic Heat Exchanger Base
  • 10:1 Turndown Ratio (110-199 Sizes)
  • 8:1 Turndown Ratio (80 Size)
  • Built-In ECM Circulator (Taco 0015e)
  • 3-in-1 Air/Vent Adapters w/Test Port
  • Built-In LWCO Port
  • Wall-Mount Bracket and Template
  • Condensate Trap
  • Low NOx SCAQMD Compliant
  • High Altitude Approved

Control Features

  • Color Touchscreen Display
  • Easy Setup with Control Wizard
  • Zone and/or Priority-Based Control
  • 4 Thermostat Inputs (2 on Combi)
  • 0-10V Input (Modulation or Setpoint)
  • Outdoor Reset for Each Priority
  • Rate Adjustable per Priority
  • 4 Outputs (2 on Combi) can be used with external circulators, dampers or system aux
  • Aux Inputs – Flow Switch or End Switch
  • Aux Outputs – System Pump or Damper
  • Individually Fused 120V Outputs
  • Modbus Connectivity
  • Additional Heat Demand Contact
  • Multi-boiler functionality with optional kit

Optional accessories

    Easy-up manifold
  • Avoid flow issues, save time with quick fit near boiler piping
    Isolation flush valves
  • For easy DHW maintenance
  • Paintable sidewall vent termination
  • Blend in, nice appearance
  • 2” and 3” concentric vent termination
  • For one penetration through sidewall or roof
  • Low water cutoff
  • Simple plug and play kit to meet local codes
  • Condensate neutralizer
  • To protect home drain line
  • Water treatment and test kit
  • To help ensure entire system protection
  • Parts kit
  • Critical components to optimize customer service
  • Maintenance kit
  • Key components to perform annual boiler maintenance
  • Propane kit
  • Simple conversion to match home LP supply
  • System sensors
  • Extra monitoring points on supply and return pipes for further modulation
  • Multi-boiler wiring kit
  • Connect and operate up to eight ECO Tec boilers, to satisfy the needs of larger structures
  • Floor stand kits
  • Pedestal version (shown)
  • Adjustable frame version
See All Weil-McLain Products

Specification Sheet

Basic Information
MPN ? Manufacturer Part Number 383-900-155
UPC / GTIN 672619211681
Manufacturer Weil-McLain
Series ? A manufacturer's grouping of items that match, coordinate, or complement each other. ECO Tec
Dimensions and Measurements
Weight ? Weight 158.00
BTU Input 150,000
AFUE 95%
Tank Capacity 3.1 gallons
Vent Size (Inches) 3'
Height (Inches) ? The vertical measurement from bottom to top, measured in inches. 30"
Length (Inches) ? The distance of the product's longest side, measured in inches. 19"
Width (Inches) ? The horizontal measurement from left to right, measured in inches. 20"
Characteristics and Features
Material ? The material(s) used in the construction of the product. Stainless Steel
Boiler Type Residential
Fuel Type Natural Gas
Venting Direct Vent

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