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1. The combustion efficiency of a non-weather-
ized oil furnace must be at least

Sagot :

luisvaschetto

The combustion efficiency of a non-weatherized oil furnace must be at least 75%. It uses a secondary heat exchanger to extract heat.

Condensing furnaces

A condensing oil furnace is a heating device that needs a source of oil in order to generate heat.

This device (condensing oil furnace) may use a secondary heat exchanger to extract more heat from gases.

The condensing oil furnaces exhibit a high efficiency ranging from 75% to 90+%.

Learn more about condensing oil furnaces here:

https://brainly.com/question/6486936

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