# A Review of Worldwide Strategies for Promoting High-Temperature Heat Pumps
## 4 The Promotion of IHPs over the World
### Usa
It was further strengthened by the Residential Cold Climate Heat Pumps Technology Challenge introduced in December 2021 [106];
* Japan-USA Clean Energy Partnership: this partnership aims to accelerate the adoption of HPs in domestic and local markets, fostering a collaborative approach between Japan and the USA to promote clean energy technologies [91];
* ICEE HOT (Installing Clean Efficiency Energy Hastens Our Transition) Act: enacted in May 2022, this act provides discounts for distributors and manufacturers of heat pumps, HP water heaters, and HP clothes dryers made in the USA, incentivizing the production of these energy-efficient appliances [107];
* HEATR (Heating Efficiency and Affordability through Tax Relief): this legislation offers tax incentives to manufacturers to increase the production of HPs and phase out inefficient air conditioners (ACs), promoting more efficient heating solutions [108];
* Defense Production Act Invocation: in June 2022, the Defense Production Act was invoked to boost the manufacturing of key energy technologies, including HPs, ensuring a stronger focus on energy independence and technological advancement [109];
* Inflation Reduction Act: this act includes provisions to support energy efficiency and the adoption of renewable energy technologies, contributing to a broader strategy to reduce inflation through sustainable practices [110];
* New Efficiency Ratings for AC and Heat Pumps: effective January 2023, new efficiency ratings for ACs and HPs were introduced, setting higher standards for energy performance and encouraging the use of more efficient cooling and heating systems [111]. These initiatives and regulations collectively aim to enhance energy efficiency, reduce emissions, and support the transition to cleaner energy technologies in the building sector. Numerous recent initiatives have aimed to bolster the development and utilization of HP technology, specifically in the industrial sector. This focus is particularly significant in light of the imperative to decarbonize industries, aligning with the USA environmental goals. The Biden Administration has set ambitious targets, including achieving 100% carbon pollution-free electricity by 2035 and net-zero GHG emissions by 2050. These objectives are outlined in Executive Order 14008 [112], which presents pathways toward a net-zero economy by 2050. The industrial decarbonization strategy in the USA aligns with the Justice40 Initiative, which ensures that at least 40% of the benefits from federal climate and clean energy investments reach disadvantaged communities [113]. The Industrial Decarbonization Roadmap provides a cohesive technical approach, focusing on four key pillars: energy efficiency; industrial electrification; low-carbon fuels, feedstocks, and energy sources; and CCUS [114]. One crucial aspect of industrial electrification involves the adoption of HTTHPs. The USA's Department of Energy (DOE) has allocated significant funding to accelerate domestic manufacturing of HPs, leveraging President [PERSON]'s Inflation Reduction Act and the Defense Production Act (DPA) [115; 116]. These investments not only promote energy efficiency but also support the Justice40 Initiative's goals. Moreover, research initiatives led by institutions like Purdue University aim to develop HTTHP technology capable of significantly reducing energy use and GHG emissions in various industrial applications [117]. The DOE's Industrial Efficiency and Decarbonization Office, through its roadmap, funds projects to reduce the industrial carbon footprint, facilitating the transition to a net-zero emissions economy. Its decarbonization efforts span across multiple sectors, including chemicals, iron and steel, food and beverage, cement and concrete, and paper and forest products. These projects focus on enhancing energy efficiency, developing clean technologies, and reducing emissions. Through collaborations between universities, national laboratories, and companies, the USA is advancing toward a cleaner, more sustainable industrial sector.