Enjoy Cozy, Quiet, Efficient Heat for Years to Come with a Gas-Fired Boiler.

When you want warm, even heat from an energy-efficient source, Twin Air LLC in Manassas would like to help you find a gas-fired water boiler that matches what you’re looking for. With many ENERGY STAR® qualified choices, we’re confident we have the Lennox® gas-fired water boiler that you’re looking for.

Look at the many features of our high-efficiency boilers.

GWM-IE Boiler

With a 95% AFUE rating,* The GVM-IE boiler is ENERGY STAR® qualified and up to 40% more efficient than conventional boilers. It contains an electronic ignition control, which coordinates power to the burner to your household’s usage to help ensure it maximizes your fuel savings while keeping your house at the temperature you desire.

  • Durable, self-cleaning, stainless steel heat exchanger converts unused energy into usable heat
  • Sealed combustion minimizes noise
  • Modulating capability aligns with your comfort needs by enabling the burner to fire at as low as 20% of its capacity
  • Stainless steel mesh burner fights corrosion and oxidation
  • CPVC flue condensate collector is corrosion-resistant and eliminates the use of metal in the venting area
  • 15-year limited warranty on heat exchanger, 10-year limited warranty on remaining covered components
GWM-IE Boiler
Efficiency Rating (AFUE): up to 95
Energy Star badge

GWB9-IH Boiler

Simple to integrate with an existing, traditional radiator system, the GWB9-IH boiler is ENERGY STAR qualified. What’s more, it boasts an AFUE rating of 90%.* It also carries heat potentially three times faster than a traditional cast-iron exchanger, thanks to its cast-aluminum heat exchanger.

  • Tough, heavy-gauge steel cabinet with baked-on paint finish
  • [Compact|Condensed|Small]38] design for flexible installation
  • Sealed combustion keeps operating noise at a minimum
  • Electronic ignition monitors water temperature and turns on the burner only when needed
  • Burns natural gas or can convert to LP gas
  • 15-year limited warranty on heat exchanger, 10-year limited warranty on remaining covered components
GWB9-IH Boiler
Efficiency Rating (AFUE): up to 90
Energy Star badge

GWB8-IE Boiler

Significantly more efficient than an older boiler, the GWB8-IE boiler carries an 84.4% efficiency rating.* What makes it even better is that it can work with traditional radiator systems.

  • Electronic ignition monitors water temperature and lights the burner only when needed
  • Thick fiberglass insulation minimizes off-cycle heat and energy loss
  • Cast-iron heat exchanger and titanium burners constructed for years of reliability
  • Offered in six different sizes for ultimate installation flexibility
  • Burns natural gas or can be converted to LP gas
  • 20-year limited warranty on heat exchanger, 1-year limited warranty on remaining covered parts
GWB8-IE Boiler
Efficiency Rating (AFUE): up to 84.4

GWB8-E Boiler

This standard-efficiency boiler will perform for many years because it’s constructed from some of the best materials, including a long-lasting cast-iron heat exchanger and durable stainless steel burners.

  • Electronic ignition monitors water temperature and ignites the burner only when needed
  • Thick fiberglass insulation minimizes off-cycle heat and energy loss
  • Compatible with traditional radiator systems
  • Offered in nine different sizes for installation anywhere in your home
  • Burns natural gas or can convert to LP gas
  • 20-year limited warranty on heat exchanger, 1-year limited warranty on remaining covered parts
GWB8-E Boiler
Efficiency Rating (AFUE): up to 83.9

Our team at Twin Air LLC in Manassas is ready to help you find the right gas fired water boiler for you, or help you maintain your existing boiler. Make your appointment online, or by calling us at 703-666-8907.