Standard features for ULTRA model ULSA
- natural gas
- fully modulating burner with 5:1 turn down ratio for close temperature control and reduced temperature gradients
- fully condensing: 100% thermal efficiency at full load, 109% at partial load
- premix burner with combustion circuit under negative pressure: no gas or flue gases can escape
- primary tubular heat exchanger
- titanium stabilized aluminized steel secondary heat exchanger
- 4 suspension points
- factory installed gas line nipple to the exterior of the cabinet
- condensate drain
- sealed control compartment for all electrical components and the extraction fan
- integrated safeties
Optional features for ULTRA model ULSA
- Propane version
- heat exchanger assembly completely in stainless steel
- 30° and 60° discharge nozzle
- Vertical louvres
- SmartCom, Opentherm or Brahma thermostats