Client: HEET
Authors: Tanya Stasio, Joshua Castigliego, Sagal Alisalad, and Liz Stanton, PhD.
March 2022
On behalf of the HEET, Researchers Tanya Stasio and Joshua Castigliego, Assistant Researcher Sagal Alisalad, and Director and Senior Economist Liz Stanton, PhD explored the feasibility of injecting green hydrogen and/or upgraded biogas (also known as “renewable” natural gas) into Massachusetts’ existing gas supply as a building decarbonization strategy. AEC compared these alternatives to gas heating and modern electric heat pumps in terms of price, feasibility, supply, and safety, and found that upgraded biogas and green hydrogen are infeasible, expensive, and unsafe strategies for decarbonization of building heating. Moreover, a green hydrogen/fossil gas blend is not feasible before 2040; For a green hydrogen/fossil gas blend to be a viable heating fuel, gas utilities would need to replace all of Massachusetts’ leaky-prone pipes.
AEC also estimated annual home heating costs for an average Massachusetts home using different heating options and found that by the mid-2030’s heating with air-source heat pumps, ground-source heat pumps, and/or networked geothermal systems will be more affordable than heating with fossil gas.