| Central Boiler Laminated Solenoid for All Models (Pre-2003) | altheatsupply.com | 69.49 USD | 71.5 USD | −2.8% |
| Central Boiler Comfort Tech Wall Mount Convection Heater (#1941) | twinwatersenergy.com | 9552 USD | — | — |
| Thermopex, 1 1/4'' Lines, 300' Roll | woodfurnaceworld.com | 7670.88 USD | — | — |
| Hanging Hydronic Fan And Coil, 200k BTU P/N BP200 | twinwatersenergy.com | 6782 USD | — | — |
| Central Boiler Parts Heat Exchanger Coil (220k Btu) #111 | twinwatersenergy.com | 6332 USD | — | — |
| Central Boiler Parts Heat Exchanger Coil (185k Btu) #110 | twinwatersenergy.com | 5176 USD | — | — |
| Central Boiler Draft Inducers For CL 7260. Pick From 4 Styles | twinwatersenergy.com | 4018 USD | — | — |
| Central Boiler Parts Heat Exchanger Coil (140k Btu) #108 | twinwatersenergy.com | 3981 USD | — | — |
| Central Boiler Parts Heat Exchanger Coil (125k Btu) #107 | twinwatersenergy.com | 3597 USD | — | — |
| Central Boiler Parts Heat Exchanger Coil (100k Btu) #106 | twinwatersenergy.com | 3543 USD | — | — |
| Hanging Hydronic Fan And Coil, 100k BTU P/N #BP100 | twinwatersenergy.com | 3275 USD | — | — |
| Central Boiler Draft Inducers For CL 7260. Pick From 4 Styles | twinwatersenergy.com | 3248 USD | — | — |
| Central Boiler Draft Inducers For CL 7260. Pick From 4 Styles | twinwatersenergy.com | 3248 USD | — | — |
| Central Boiler Draft Inducers For CL 7260. Pick From 4 Styles | twinwatersenergy.com | 3248 USD | — | — |
| Central Boiler Parts Heat Exchanger Coil (95k Btu) #102 | twinwatersenergy.com | 3145 USD | — | — |
| Central Boiler Parts Heat Exchanger Coil (80k Btu) #109 | twinwatersenergy.com | 2791 USD | — | — |
| Central Boiler HeatTrac Controller Update Kit, For Older Temperature Display | twinwatersenergy.com | 2685 USD | — | — |
| Central Boiler 8" Chimney Tee W/ Rope Rings Kit, Classic, EClassic (2500433) | twinwatersenergy.com | 2635 USD | — | — |
| Hanging Hydronic Fan And Coil, 50k BTU P/N #BP50 | twinwatersenergy.com | 2529 USD | — | — |
| Central Boiler Parts Heat Exchanger Coil (50k Btu) #287 | twinwatersenergy.com | 2523 USD | — | — |
| 600K Titanium Shell & Tube Exchanger | woodfurnaceworld.com | 2372.8 USD | — | — |
| Central Boiler Parts EClassic 3200/3250 Chimney Tee 8" Wood Furnace #2500245 | twinwatersenergy.com | 2276 USD | — | — |
| Central Boiler Chimney Tee, 6", 8" and 10" Inside Pipe Measure Listed By Model | twinwatersenergy.com | 2236 USD | — | — |
| Central Boiler Maintenance Combo Package Deal (3) Ashtrol & (2) MolyArmor 350 | twinwatersenergy.com | 2190 USD | — | — |
| Central Boiler Parts Draft Inducer Fan Kit for Classic Boilers | twinwatersenergy.com | 2173 USD | — | — |
| Central Boiler Secondary Air Charge Classic Edge 960 (1200962) | twinwatersenergy.com | 2154 USD | — | — |
| WoodMaster Secondary Air Charge CleanFire 900 (1200962) | twinwatersenergy.com | 2154 USD | — | — |
| WoodMaster/CleanFire 900 Replacement Combustion Air Tube (2500684) | twinwatersenergy.com | 2036 USD | — | — |
| Plate Heat Exchanger 10 x 20-55 Water to Water | woodfurnaceworld.com | 1985.19 USD | — | — |
| Central Boiler Parts EClassic 1450 Chimney Tee 6" Outdoor Wood Furnace #2500416 | twinwatersenergy.com | 1980 USD | — | — |
| Central Boiler Secondary Air Charge Classic Edge 560 (1200852) | twinwatersenergy.com | 1937 USD | — | — |
| Heat Exchanger Plate 10 x 20-40, 1-1/2" Port | woodfurnaceworld.com | 1933.64 USD | — | — |
| Retro Df Lp 7260 Burner Kit W/ Burner | woodfurnaceworld.com | 1874.19 USD | — | — |
| Central Boiler Secondary Air Charge Classic Edge 750 and 760 (1200317) | twinwatersenergy.com | 1850 USD | — | — |
| WoodMaster Secondary Air Charge CleanFire 500 (1200852) | twinwatersenergy.com | 1812 USD | — | — |
| WoodMaster Secondary Air Charge CleanFire 700 (1200317) | twinwatersenergy.com | 1801 USD | — | — |
| Central Boiler Secondary Air Charge Classic Edge 550 (1200318) | twinwatersenergy.com | 1686 USD | — | — |
| Kit, Lp, (Dual Ready) | woodfurnaceworld.com | 1678.04 USD | — | — |
| Central Boiler Secondary Air Charge Classic Edge 360 (1200857) | twinwatersenergy.com | 1669 USD | — | — |
| WoodMaster Secondary Air Charge Classic CleanFire 300 (1200857) | twinwatersenergy.com | 1669 USD | — | — |