Pros, Join Our TradeMaster Program!
Great things really do come in small packages. The new AquaBalance™ combi-boiler combines the unmatched reliability of Weil-McLain with the warmth of high-efficiency space heating and the convenience of on-demand domestic hot water. All in one elegant, space-saving package.

  • 95% annual fuel utilization efficiency (AFUE) – low fuel usage, saves energy
  • Natural or Propane (LP) gas operation – factory shipped as NG, optional LP conversion kit
  • Compact design – increases placement options
  • Heavy gauge insulated jacket – provides quiet operation
  • 10-to-1 turn down ratio – precisely matches minimal energy usage to the immediate system need
  • Low NOx rated – low emissions level achieved South Coast certification
  • Single tube, large diameter, ASME certified 316L Stainless Steel heat exchanger
  • Pre-wired, plug-in ready electrical design
  • Contractor friendly removable sides – makes service clean and easy
  • Wall mounting bracket and hardware
  • Honeywell® boiler control with digital display
  • Commercial grade 120V power cord with 3 prong plug
  • Unique 3-in-1 vent adapter – approved to accept PVC, CPVC, SS or PP vent materials
  • Multiple vent options – direct vent with 2 pipes or concentric, through sidewall or roof
  • Internal condensate trap
  • 24VAC thermostat relay
  • Factory tested
  • Internal 3-speed circulator
  • DHW flat plate heat exchanger
Read more
Manuals (3)
Fuel Type:
Natural Gas
IBR Rating:
BTU Output:
BTU Input:
DOE Rating:
System Type:
Hydronic (Water)
Height (Inches):
Vent Type:
Direct Vent
Combo DHW
EI/Spark Ignition
Wall Mounted
Energy Star Rated:
10 Year Limited Warranty on Heat Exchanger for Residential Use/ 5 Years Limited on Heat Exchanger for Commercial Use/ 2 Years Limited on Parts
Speak with a real person who will go out of their way to help!
Closed Now: Phone Hours
Monday – Thursday
8am–7:45pm ET
9am–7:45pm ET

Product Reviews

Product Q&A

Add-on Item

This item is cost-prohibitive to ship on its own but is available to ship with orders over $200.

Why don't we show the price of this item?

We try to always offer you the lowest prices possible, but some manufacturers require that we only show these low prices once you take further action.

To see the price, simply add the item to your cart or sign in.