This is the approach that was taken on the retrofit of PSNH Merrimack Unit 2, the first retrofit of a coal-fired boiler in the United States.
The PSNH Merrimack Unit 2 changed the energy industry in the U.S.
mnli hypothesis: The PSNH Merrimack Unit 2 changed the energy industry in the U.S. premise: This is the approach that was taken on the retrofit of PSNH Merrimack Unit 2, the first retrofit of a coal-fired boiler in the United States.