The Path to Drawdown: High-Efficiency Heat Pumps
Buildings and construction account for roughly 38% of global CO2 emissions and about 35% of total energy-use. More than one-third of that is for heating and cooling, which could cut energy use by up to 30-40%.
Heat pumps are the technology that can most effectively increase heating and cooling efficiency. Heat pumps extract heat from the air and transfer it inside-out for cooling, and outside-in for heating the building. The ground, air, or water can be the source of or outlet for that heat.
Heat pumps are a technology that’s well-understood, easy to adopt, and already in use around the world. They can supply indoor heating, cooling, and hot water, all from one integrated unit. With high efficiency, they can dramatically reduce building energy use. When paired with renewable energy sources, they can virtually eliminate all emissions from heating and cooling.
According to Project Drawdown, high-efficiency heat pumps need to keep growing mildly between now and mid-century to help achieve decarbonization:
- <::marker> In 2018 high-efficiency heat pumps comprised 3% of the market for delivered heat globally
- <::marker> To stay below 1.5°C of global warming, high-efficiency heat pumps need to grow enough to account for 4.3% of that market by 2060
- <::marker> That’s 0.86% growth annually between 2018 and 2060
If they can grow at this rate, heat pumps can help avoid up to 9.3 gigatons of GHG emissions.