the nationalaudit office has pointed _ been working?fice has pointed out _ been working? the nationalaudit office has pointed out it - been working? the nationalaudit office has pointed out it has - been working? the national audit i office has pointed out it has helped to make the technology is more affordable so the main scheme they haveis affordable so the main scheme they have is a boiler upgrade scheme offering households seven and a half thousand pounds to upgrade their heat pump which makes it comparable to a gas boiler but the key finding is not enough people know about heat pumps or they are needed within homes to help reduce emissions. the other main concern was the government dithering over hydrogen. heat pumps are a green alternatives to gas boiler and they use electricity instead of gas and that means is we use more renewable energy to produce electricity then fewer emissions will be produced but hydrogen is another alternative and over the last year we have seen hydrogen trials counselled across the uk and the national aud