2024 42 USC 13452 – Natural gas and electric heating and cooling technologies

2023 42 USC 13452 – Natural gas and electric heating and cooling technologies

2022 42 USC 13452 – Natural gas and electric heating and cooling technologies

2021 42 USC 13452 – Natural gas and electric heating and cooling technologies

2020 42 USC 13452 – Natural gas and electric heating and cooling technologies

2018 42 USC 13452 – Natural gas and electric heating and cooling technologies

2017 42 USC 13452 – Natural gas and electric heating and cooling technologies

2015 42 USC 13452 – Natural gas and electric heating and cooling technologies

2014 42 USC 13452 – Natural gas and electric heating and cooling technologies

2013 42 USC 13452 – Natural gas and electric heating and cooling technologies

2012 42 USC 13452 – Natural gas and electric heating and cooling technologies

2010 42 USC 13452 – Natural gas and electric heating and cooling technologies