Click on links below to view product specifications (these are PDF files) Model # - Installation Type
> L1 - Horizontal or Vertical
> L1S - Horizontal with Sump
> L2 - Vertical Up
> L3 - Vertical Down / Horizontal Out
> L4 - Horizontal In / Vertical Down
> L5 - Horizontal In / Vertical Up
> L6 - Vertical In / Horizontal Out
> L7 - Vertical Up / Horizontal Out
> T - Horizontal
> TS - Horizontal (Vertical Tank)
> EH - Exhaust Heads
