Gallant Wall Condensing Boiler

Heat Only Wall

The Gallant Heat Only Wall has the capability to modulate with a turndown ratio of up to 5.5:1. This modulation means the boiler will alter its firing rate to meet the current demand, causing less cyclic behavior and resulting in lower operating costs. The improved CTRMax Control System makes configuration quick and easy with setup in 60 seconds or less for standard installations. For unique installations, the 4 circulator outputs are fully configurable for endless customization.

Warranty Info

Standard – 2-year parts and 10-year primary heat exchanger warranty.
Plus – 5-year parts, 2-year labor allowance, and 10-year primary heat exchanger warranty with registration.
Elite – 6-year parts, 3-years labor and 12-year heat exchanger warranty offered with registration, combustion analysis and hydronic system treatment. See warranty for details.

Features and Benefits

  • Industry Leading Warranty Program with Coverage up to 6 yr. Parts, 3 yr. Labor & 12 yr. Heat Exchanger
  • Integrated Cascade Controlling for up to Six Boilers
  • Multi-Boiler Cascade Piping System Available
  • 4” Vent up to 100’
  • Quick-Dose System Inhibitor/Protector Included
  • Two Reset Curves / Set Points
  • Stainless Steel Fire Tube Heat Exchanger
  • Easy Troubleshooting in Plain Text, No Codes
  • High Water Content
  • ASME Stamped
  • Low NOx – 2012 SCAQMD Certified
  • Developed for the USA

Product Comparison

Gallant Model Heat Only 250 Heat Only 299 Heat Only 399
Input Modulation (MBH) 43.6 to 240 72.5 to 299 72.5 to 399
AFUE 95% 95% 95.1%**
DOE Heating Capacity (MBH) 222 278 379
Net Boiler AHRI Rating (MBH) 193 242 330
Fuel NG & LP NG & LP NG & LP
Turndown Ratio 5.5:1 4.1:1 5.5:1
Vent/Air Diameter 3″ 4″ 4″
Supply/Return Connections 1-1/4” 1-1/2″ 1-1/2″
Gas Connections 3/4” 1″ 1″
Water Volume Gal. 4.5 7.4 7.4
Weight (Lbs) 140 210 216
Cabinet Depth (inch) 17-5/16” 23-5/8″ 23-5/8”
Cabinet Width (inch) 19-3/4” 24-7/8” 24-7/8”
Cabinet Height (inch) 36-9/16” 39-3/8” 39-3/8”

Additional Products

Image of an exalt Wall Boiler

Exalt Heat Only

Image of an exalt Wall Boiler Icon

Ideal high – efficiency condensing boiler. Available in 110, 155 and 199 MBH for all your home heating needs.

Image of an exalt combi boiler

Exalt Combi

Image of an exalt combi boiler Icon

Ideal high- efficiency condensing boiler. Combi sizes are available in 155 and 199 MBH for all your home heating and your hot water needs.