Search Climate Insights Directory

The report finds that heat pumps are the lowest-cost heating and cooling option for most Canadian households over the system's lifetime, though adoption is hindered by high upfront costs, information gaps, and structural barriers for renters. It recommends streamlining rebates, establishing one-stop shop services, and updating building codes to include cooling requirements.

Heat pumps are identified as a cornerstone for sustainable buildings, capable of significantly reducing CO2 emissions by replacing fossil fuel heating. While technologically mature and often cheaper over their lifetime than gas boilers in several major economies, their rollout is hindered by high upfront costs, poor building insulation, and a shortage of skilled technicians. The document highlights that meeting 2030 climate pledges will require tripling the global heat pump workforce to over 1.3 million and implementing strategic policies such as financial incentives, building codes, and innovative business models like heat-as-a-service.

The report examines the use of energy service agreements (ESAs) to overcome financial and structural barriers to decarbonizing affordable multifamily housing in California, specifically addressing split incentives and upfront costs.

The report analyzes a partnership between Hydro-Québec and Énergir to transition buildings to bi-energy heating (electricity and natural gas). While the agreement reduces natural gas consumption by over 70% and is more cost-effective for Hydro-Québec than full electrification, the authors warn of potential 'carbon lock-in' due to 15-year contracts and the uncertain availability of renewable natural gas to cover remaining fossil fuel use by 2050.

Embodied carbon, which accounts for 11 percent of global greenhouse gas emissions, refers to the emissions released during the lifecycle of building materials. Reduction strategies include using carbon-storing materials like mass timber, adopting 3D printing and robotic automation, and implementing material efficiency through modular construction. In the US, the Inflation Reduction Act provides nearly $10 billion for reducing embodied carbon, while several states have adopted 'Buy Clean' laws. RMI research indicates that low-cost embodied carbon solutions can reduce emissions by 19 to 46 percent with cost premiums under 1 percent.

The document examines how selecting materials with low embodied carbon or carbon-storing properties during building retrofits can prevent emissions spikes and transform buildings into carbon sinks. It analyzes exterior insulation systems and affordable multifamily housing projects in the Northeast to demonstrate that sustainable material substitutes are currently available to help meet 2030 decarbonization goals.

The Home Efficiency Rebate program, established by the Inflation Reduction Act, provides $4.3 billion to incentivize whole-home retrofits for single-family and multifamily dwellings. Funding is distributed to state energy offices (SEOs) via formula, with rebate amounts scaling based on energy savings and doubling for low-income households. The guide recommends that states avoid subsidizing new fossil fuel appliances, stack incentives, and prioritize low-income access by setting spending goals of 40% to 80% of program funds for these households. It also suggests providing upfront rebates and utilizing zero-interest loans for Low Income Housing Tax Credit (LIHTC) properties to avoid tax complications.

The report examines the opportunity to phase out residential central air conditioners in Canada in favor of heat pumps. It argues that because the two technologies are mechanically similar, a market transformation strategy could bypass significant adoption barriers. The authors project that installing heat pumps instead of central air conditioners from 2025 to 2035 would result in C$12.6 billion in net benefits, including C$10.4 billion in energy bill savings and a reduction of 19.6 million tonnes of CO2 equivalents. The document identifies barriers such as low consumer familiarity, high upfront costs, and emergency replacement cycles, and proposes implementation routes including national equipment mandates, building code updates, and upstream incentives for distributors.

The report examines the potential for decarbonizing Canada's residential building sector by replacing central air conditioners with heat pumps. It identifies five primary barriers to adoption—lack of familiarity, the infrequent nature of HVAC replacement, short decision windows during emergencies, limited stock, and higher initial costs. The authors model a scenario where all new central air conditioners are replaced by heat pumps from 2025 to 2035, projecting a net benefit of 12.6 billion CAD, including 10.4 billion CAD in energy bill savings and a reduction of 19.6 million tonnes of CO2 equivalent. The document proposes several policy interventions, including national equipment regulations, updated building codes, and upstream incentives for distributors and manufacturers, while highlighting the importance of energy justice for low-income tenants and vulnerable populations.

The briefing proposes a phased framework for building decarbonization—moving from efficiency to electrification, renewable energy, and finally the removal of embodied carbon—to reach absolute zero. It argues that because the necessary technologies already exist, the primary barrier is cost and adoption speed. By performing segmentation analysis on real estate subsegments, such as large commercial office buildings, financial actors can provide targeted interventions that drive demand, push technologies up their learning curves, and lower prices for the broader market.

The report analyzes the impact of the Inflation Reduction Act (IRA) on the U.S. building sector, highlighting its potential to reduce annual emissions by 32 to 33 million metric tons of CO2e by 2030. It details various residential rebates (HEEHRA, HOMES), tax credits (25C, 25D, 45L), and commercial incentives (179D), while emphasizing that these must be paired with stricter appliance standards and updated building codes to overcome slow stock turnover. The document provides specific implementation guidance for State Energy Offices and utility regulators to ensure an equitable transition, particularly for low-to-moderate-income households.

The Pembroke-Hopkins Park Energy Efficiency Pilot (PEEP) provides an alternative to fossil fuel infrastructure in rural Illinois by implementing energy efficiency and electrification upgrades in low-income homes. The project, led by the Community Development Corporation of Pembroke and Hopkins Park (CDC-PHP) in collaboration with RMI and other partners, replaces propane and wood heating with electric air source heat pumps and induction stoves while improving insulation. Early results show reduced energy bills and improved indoor comfort for participants. The project aims to serve as a transferable model for other disenfranchised rural communities across the United States by focusing on community trust and relatable examples of clean energy success.

This guide outlines a five-step process for US homeowners to transition to all-electric, energy-efficient homes. It emphasizes the importance of setting personal goals, conducting energy assessments, hiring reputable contractors, and utilizing financial incentives provided by the Inflation Reduction Act (IRA). The recommended technical path includes improving insulation and sealing, installing electric heat pumps for heating, cooling, and hot water, and switching to induction stoves.

The document assesses the viability of low-carbon fuels for New York's building sector, concluding that they are inefficient and costly compared to direct electrification. It highlights that green hydrogen requires significantly more clean electricity than heat pumps and poses infrastructure risks like pipeline embrittlement. Additionally, it notes that biomethane supplies are insufficient to meet demand and that both biomethane and synthetic methane introduce new methane emission risks. The brief advocates for prioritizing energy efficiency and electrification to meet the goals of the Climate Leadership and Community Protection Act.

RMI advocates for a comprehensive transformation of the global economy across ten key fronts to meet the 1.5C climate target. These priorities include increasing political ambition, decarbonizing buildings and transportation, phasing out coal and gas, scaling green hydrogen, and enhancing emissions transparency. The organization emphasizes the need for a three- to six-fold increase in zero-carbon capital investments and the integration of mitigation and adaptation efforts, particularly in the Global South, to ensure an equitable transition.

The document lists professional biographies for six individuals involved in energy and climate policy, including representatives from National Grid, the Business Council for Sustainable Energy, the American Clean Power Association, the Alliance to Save Energy, the Solar Energy Industries Association (SEIA), and Johnson Controls.

The National Cooling Action Plan (NCAP) for Grenada identifies that buildings and the refrigeration and air conditioning (RAC) sector are major contributors to national greenhouse gas emissions. The report presents emission pathways and mitigation potentials, noting that an enhanced ambition scenario based on international best practices could reduce building sector emissions by 62% by 2050 compared to a low ambition scenario.

The policy brief advocates for targeted, refundable tax credits to drive the transition to zero-carbon buildings and deep energy retrofits in the US. It proposes six specific tax credit mechanisms—including improvements to existing credits like 45L and 179D and the creation of new ones for lead safety and clean heating—to overcome cost barriers, support low-income housing, and scale domestic manufacturing of heat pumps.

Demand flexibility—the ability to shift energy demand based on real-time signals—could reduce New York City building emissions by approximately 40% as the grid decarbonizes. Beyond carbon, it can lower a building's peak electricity consumption by 30% to 50%, reducing reliance on peaker plants and lowering grid operational and infrastructure costs. The document highlights that electrified buildings offer more flexable load and that integrating a time-of-use carbon metric into Local Law 97 would provide building owners with a more cost-effective route to compliance.

The briefing highlights the role of Energy Management Information Systems (EMIS) in decarbonizing New York City's large buildings. It notes that while many buildings have basic monitoring, they lack the analytics to optimize energy use, particularly in tenant spaces. The document asserts that EMIS can lead to a median energy consumption reduction of 8% and is essential for meeting the requirements of Local Law 97, which mandates significant greenhouse gas emission reductions by 2050.