311AAV:

Energy Efficiency Up to 80% AFUE

Warranty 5-year parts limited warranty, 20-year limited warranty on heat exchanger

311JAV:

Energy Efficiency Up to 80% AFUE, Low NOx

Warranty 5-year parts limited warranty, 20-year limited warranty on heat exchanger

Controls Supported Thermidistat™, Thermostat

Diagnostics On board

Energy Efficiency

Quiet Level

Durability

Capacity 44,000 - 154,000 BTUH

Blower Motor Single speed

Primary Heat Exchanger Serpentuff™ polypropylene- coated

Fuel Natural gas, convertible to liquid propane (LP)

* Energy efficiency - Up to 80% AFUE

* Fan On Plus™ technology

* QuieTech™ noise reduction system

* High efficiency air filtration cabinet

* Pilot-free PerfectLight™ ignition

* Filter cabinet

* 20-year heat exchanger limited warranty

* 5-year parts limited warranty

Profile 4-way multipoise

Construction Galvanized steel

Paint Baked on urethane base coat and polyester top coat