The automatic control level and heat efficient for coal heating boiler is lower for most of domestic boiler so far.

目前国内大部分燃煤采暖用锅炉房自动化控制水平普遍较低，热效率也不高。

youdao

However MIT's method to convert light and heat into electricity is much more efficient than previous versions.

然而，MIT将光和热转化为电力的方法比之前的版本要更有效。

youdao

That meant the destruction of vast grasslands, which released equally vast amounts of methane-a gas far more efficient at trapping heat than carbon dioxide is.

这意味着，大片草地被毁灭，从而也产生了大量的沼气- - -一种比二氧化碳更有效的燃气。

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The walls were built extra thick to save heat and energy-efficient appliances kept energy use low.

VOA: special.2009.10.27

He also wants to speed up sales of home appliances that use efficient heat pumps--made, of course, by domestic manufacturers.

FORBES: Magazine Article

Electric companies say that electric heat is 100% efficient compared to natural gas which is about 90% efficient.

FORBES: Just The Facts? How About Just The Right Context

The new regulations in Massachusetts, which will take effect in June, will promote smaller and more efficient combined-heat-and-power biomass facilities that require less fuel and have lower net carbon dioxide emissions over time.

FORBES: Massachusetts Addresses "Biomass Loophole" and Limits Subsidies