The efficiency of the furnace more than doubled.

锅炉的效率提高了一倍多。

youdao

The gist of the present furnace design with high thermal efficiency and fuel utilization.

本设计的要点是加热炉高的热效率，提高燃油的利用率。

youdao

Flue gas can also beset up waste heat recovery system to increase the thermal efficiency of furnace.

也可以设置烟气余热回收系统来提高加热炉的热效率。

youdao

For example, a gas furnace must have at least a 95% efficiency rating to qualify for the credit.

FORBES: Energy Tax Breaks: About To Expire

"The efficiency and sustainability of the new furnace will also make a major contribution to our efforts to create an 'all-weather' company in Europe, " said Mr Kohler.

BBC: Wales

The old blast furnace was decommissioned in July last year before being completely rebuilt, incorporating the latest technology to improve energy efficiency, environmental performance, safety standards and capacity.

BBC: Tata Steel's ?185m Blast Furnace No 4 starts up