GV90+4 84,000 BTU High Efficiency Gas Boiler (Nat Gas & LP) T6 Pro Smart Wi-Fi Programmable Thermostat, 2H/2C – Labor cost included



  • Maximum Heat Exchanger Performance
  • Reliable boiler design
  • Smart Circulator Strategy – Built-in dual circulator strategy provides boiler protection
  • Proven Control Strategy – Allows easy integration of outdoor reset to take advantage of low water temperatures
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  • Description


  • Durable cast iron primary heat exchanger
  • 90+% AFUE efficient boiler
  • Condensing stainless steel secondary heat exchanger
  • Unique 7 pass heat exchange design maximizes heat transfer
  • Vents with PVC
  • Multiple venting options – Direct Vent, Direct Exhaust, Concentric
  • Easy Conversion To Propane-Kit included
IBR Rating: 84000
DOE Rating: 97000
BTU Input: 105000
Efficiency: 91.2%
Height (Inches): 30.75″
Length (Inches): 30-3/4″
Weight (lbs): 353 lbs
Gas Connection: 1/2″
Fuel Type: Natural Gas


Vent Type: Direct Vent
System Type: Hydronic (Water)
Features: Direct Vent
Gas Connection: 1/2″
Vent Diameter: 3″
Supply Size: 1″
Return Size: 1″