Heat exchangers (or heat recovery units) help make the overall HVAC system more efficient by capturing some of the building's already heated air and using it to warm the cold incoming air going into the system."A. True B. False:

True

Explanation:

A heat exchanger is a device that transfer thermal energy form one medium to another. It assist in the cooling and heating of homes and buildings thereby helping machines work effectively.

1. government controls industry through policy

2.government is both a consumer and a producer

4. government can use policy t influence economy

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