AquaBalance Series 2 Boiler
Compact wall-mounted boiler family with heat-only and combi versions. Bomar will confirm the appropriate heating and hot-water configuration for your home.
Have this model in mind? Send Bomar your home details so we can review the right size and compatible equipment.
System Specifications
Published specifications describe the equipment family. Exact ratings and capacities depend on the selected model and system pairing.
- Brand
- Weil-McLain
- Model Family
- AquaBalance Series 2
- Efficiency
- Up to 95% AFUE
- Operation
- Gas-Fired Condensing Boiler
- Equipment Size
- Selected after a home-specific load calculation and system review
Equipment Features
Discuss these features with Bomar when comparing your replacement options.
- Stainless steel heat exchanger
- Heat-only and combi versions
- Wall-mounted design
- Digital boiler control
View Weil-McLain Product Information. Source checked 2026-10-15. Availability and specifications require confirmation.
What Size System Does Your Home Need?
Your home’s heating and cooling needs depend on more than its square footage. Insulation, windows, ceiling height, air leakage, local weather, and ductwork all matter.
Air Conditioner Size
AC capacity is commonly expressed in tons. One ton equals 12,000 BTU/h of cooling capacity. SEER2 describes efficiency, not the size of the unit.
Furnace & Boiler Size
Heating capacity is expressed in BTU/h. Input and output ratings are different. AFUE describes annual fuel efficiency and does not replace the rated heating output. Boiler selection also depends on the hydronic or steam system.
Ductless & Home-Specific Sizing
A Manual J load calculation determines heating and cooling loads. Ductless systems need room-by-room loads and a verified indoor/outdoor match. Equipment selection also requires manufacturer performance data and a compatible system design.
Already Have A Professional Load Calculation?
Use the total cooling load from that calculation to understand the units. This conversion does not select a specific AC model or installation size.
Tell Bomar about your home in the request form below. We will review the information needed to confirm equipment sizing. Learn About Proper HVAC Sizing.
Request A System Recommendation
Choose a model or let us help you compare. Share a few home details and Bomar will follow up about equipment options, sizing, and installation.