He says five homeowners in The Netherlands are testing the heating device in their homes.

他说荷兰有5户人家在家中测试这种加热设备。

For example, the company makes fans and heating devices that do not use blades like most other products on the market.

例如，与市场上大多数产品不同，该公司生产的风扇和加热设备没有使用叶片。

We don't want to run any engine-operated equipment or gas or propane-powered heating devices indoors because of the risk of carbon monoxide.

我们可不想在室内运行任何由发动机驱动的设备或由燃气或丙烷驱动的加热设备，因为有一氧化碳中毒的危险。

Ben invented this heating device around 1740. Franklin stoves directed heat from a fireplace into a room instead of letting most of it go up the chimney.

Ben 在 1740 年左右发明了这种加热装置。 富兰克林炉子将壁炉的热量引导到房间， 而不是让大部分热量从烟囱上升。