| 23 | 20443900 | Bracket, Mounting | | |
| 22 | 20443800 | Bracket, Mounting Heater | | |
| 21 | T2008400 | Tile, Rear | | |
| 20 | T2008300 | Tile, Side, Left and Right | | |
| 19 | T2008500 | Tile, Front | | |
| 18 | 20425802 | Heat Shield, Rear Panel | | |
| 17 | 20442100 | Bracket, Flue Collector / Heat Exchanger | | |
| 16 | 20442000 | Baffle Retainer / Refractory Cover | | |
| 15 | 20441800 | Rail, Support, Outside Right Panel | | |
| 14 | 20441700 | Rail, Support, Right | | |
| 13 | 20441600 | Rail, Support, Left | | |
| 12 | 20441402 | Top, Front Section | | |
| 11 | 20441300 | Side Panel, Outside Right | | |
| 10 | 20441200 | Side Panel, Right Top Section | | |
| 9 | 20442405 | Top, Rear Section | | |
| 8 | 20442404 | Side Panel, Right Bottom Section | | |
| 7 | 20442403 | Side Panel, Water Heater | | |
| 6 | 20442402 | Panel, Rear | | |
| 5 | 20442401 | Front Panel | | |
| 4 | 20420100 | Support, Front and Rear Tile | | |
| 3 | 20440500 | Heat Exchanger Support | | |
| 2 | 20440206 | Non Combustible Base | | |
| 1 | 20440202 | Base | | |
| 10 | 20440008 | Piping Assembly | | |
| 9 | 20442900 | Modified Pipe Plug | | |
| 8 | A2003100 | Pressure Relief Valve | | |
| 7 | P0007600 | Coupling, Bronze Pipe, 3/4 NPT | | |
| 6 | P0054900 | Nipple, Brass 3/4 NPT | | |
| 5 | P2023100 | Nipple, Brass 1/2 NPT | | |
| 4 | P2023100 | Coupling, Bronze Pipe, 1/2 NPT | | |
| 3 | E0025900 | Well, Immersion | | |
| 2 | 20423402 | Baffle | | |
| 1 | 20423206 | Heat Exchanger | | |
| 7 | E2105000 | Bi-Metal Disc High Temperature Limit | | |
| 6 | E2074506 | Fan Proving Switch (5000-10000 Ft, Nat, LP) | | |
| 6 | E2074503 | Fan Proving Switch (0-5000 Ft, Nat, LP) | | |
| 5 | 20430400 | Flame Rollout Safety Switch | | |
| 4 | E2074400 | Transformer 115/24V (50VA) | | |
| 3 | E0016000 | Primary Temperature Controller | | |
| 2 | E2078500 | Time Delay Relay | | |
| 1 | E0109200 | Toggle Switch | | |
| 7 | L0032700 | 8001-10000 FT - Gas Orifice, Propane | | |
| 7 | L0050400 | 8001-10000 FT - Gas Orifice, Natural | | |
| 7 | L0050300 | 5001-8000 FT - Gas Orifice, Natural | | |
| 7 | L0032800 | 5001-8000 FT - Gas Orifice, Propane | | |
| 7 | L0032600 | 2001-5000 FT - Gas Orifice, Natural | | |
| 7 | L0032900 | 0-5000 FT - Gas Orifice, Propane | | |
| 7 | L0032600 | 0-2000 FT - Gas Orifice, Natural | | |
| 6 | V2002300 | Main Gas Valve - Propane | | |
| 6 | V2001900 | Main Gas Valve - Natural Gas | | |
| 5 | 20401202 | Pilot Assembly - Propane | | |
| 5 | 20401201 | Pilot Assembly - Natural Gas | | |
| 4 | L2010002 | Gas Manifold | | |
| 3 | L0052500 | Main Burner | | |
| 2 | 20421102 | Burner Tray | | |
| 1 | 20421202 | Burner Cover | | |
| 4 | 20425402 | Outlet Flue Collar | | |
| 3 | A2000200 | Induced Draft Blower | | |
| 2 | 20404608 | NAT. 5001-10000 FT. Blower Orifice Plate | | |
| | NAT. 5001-10000 FT. Blower Orifice Plate | | |
| 2 | 20404612 | LP 0-5000 FT. Blower Orifice Plate | | |
| 2 | 20404607 | NAT. 0-5000 FT. Blower Orifice Plate | | |
| 1 | 20430602 | Flue Collector Assembly | | |
