The turbines burn only 40 percent of the natural gas they would if they were fueled by natural gas alone, and better heatrecovery technology would lower that figure to 30 percent.
这些涡轮机只需要燃烧原本需要量的40%即可，而更先进的热能回收技术可以把这个值降低到 30%。
2
We did consider a heatrecovery ventilation system, a box and pipes that bring in fresh air.
我们的确曾经考虑过热回收通风系统，用一个机箱和一些管道引入新鲜空气。
3
Very well sealed buildings, on the other hand, like this one will have a heatrecovery ventilator, which brings in outdoor air.