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Comparison
Verdict in brief
Both the Energy Kinetics Accel CS EK2C-150 and the Energy Kinetics Accel CS EK2C-200 belong to the Energy Kinetics Accel CS line of condensing boilers. The Energy Kinetics Accel CS EK2C-150 is documented at 150 MBH input, 141 MBH heating capacity and 96.8% AFUE, while the Energy Kinetics Accel CS EK2C-200 is documented at 200 MBH input, 185 MBH heating capacity and 96.7% AFUE. Energy Kinetics Accel CS EK2C-200 lists 50 MBH more input than Energy Kinetics Accel CS EK2C-150 (200 MBH against 150 MBH). Energy Kinetics Accel CS EK2C-150 carries the higher published AFUE at 96.8%, against 96.7%.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Energy Kinetics Accel CS EK2C-150 | Energy Kinetics Accel CS EK2C-200 |
|---|---|---|
| Input | 150 MBH | 200 MBH |
| Capacity | 141 MBH | 185 MBH |
| Efficiency (AFUE) | 96.8 % | 96.7 % |
| Domestic hot water | Integrated condensing system: heat plus hot water through the Condensing Energy Manager and plate heat exchanger | Integrated condensing system: heat plus hot water through the Condensing Energy Manager and plate heat exchanger |
| Control | Condensing Energy Manager | Condensing Energy Manager |
| Fuel | Natural gas or propane with easy conversion | Natural gas or propane with easy conversion |
| Hot water first-hour rating | 245 gal/hr | 320 gal/hr |
| Venting | Multiple venting options: sidewall direct vent, through-the-roof and chimney | Multiple venting options: sidewall direct vent, through-the-roof and chimney |
| Construction | Over 70 lb of 316L stainless steel; 37 stainless-steel super turbulators; AL294C condensate collector and flue | Over 70 lb of 316L stainless steel; 37 stainless-steel super turbulators; AL294C condensate collector and flue |
Published ratings: the Energy Kinetics Accel CS EK2C-150 is rated 150 MBH input, 141 MBH heating capacity and 96.8% AFUE; the Energy Kinetics Accel CS EK2C-200 is rated 200 MBH input, 185 MBH heating capacity and 96.7% AFUE. Energy Kinetics Accel CS EK2C-200 lists 50 MBH more input than Energy Kinetics Accel CS EK2C-150 (200 MBH against 150 MBH). Energy Kinetics Accel CS EK2C-150 carries the higher published AFUE at 96.8%, against 96.7%.
The hot water first-hour rating differs: the Energy Kinetics Accel CS EK2C-150 lists 245 gal/hr, while the Energy Kinetics Accel CS EK2C-200 lists 320 gal/hr.
Both records print the same domestic-hot-water arrangement (Integrated condensing system: heat plus hot water through the Condensing Energy Manager and plate heat exchanger), control (Condensing Energy Manager), fuel (Natural gas or propane with easy conversion) and venting (Multiple venting options: sidewall direct vent, through-the-roof and chimney), per the cited sources.
Energy Kinetics
The Energy Kinetics Accel CS EK2C-150 is the first EK2C model and the highest-AFUE row in the line: 150 MBH input with 141 MBH capacity at 96.8% AFUE and a 245 gal/hr hot-water first-hour rating on the 316L stainless-steel condensing platform.
Energy Kinetics
The Energy Kinetics Accel CS EK2C-200 is the largest Accel CS model with the highest printed hot-water rating: 200 MBH input with 185 MBH capacity at 96.7% AFUE and a 320 gal/hr hot-water first-hour rating on the 316L stainless-steel condensing platform.
The Energy Kinetics Accel CS EK2C-200 lists 200 MBH, against 150 MBH on the Energy Kinetics Accel CS EK2C-150, per the cited documentation.
The Energy Kinetics Accel CS EK2C-150 carries the higher published AFUE at 96.8%, against 96.7%.
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Sources and verification
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.