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Author Question: Describe the heat exchanger in a natural gas fired unit heater. What will be an ideal ... (Read 38 times)

jeatrice

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on: Jul 22, 2018
Describe the heat exchanger in a natural gas fired unit heater.
 
  What will be an ideal response?

Question 2

What are two most recent greenhouse covering materials that reduce fuel costs more than the other earlier coverings.
 
  What will be an ideal response?


fur

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Reply #1 on: Jul 22, 2018
Answer to Question 1

Hot exhaust from the fire box passes up through sheet metal tubes while
cool greenhouse air is passed over the outside of the tubes where it picks up heat
from the tubes and then blows out into the greenhouse.

Answer to Question 2

Double layer panels of acrylic plastic and polycarbonate.


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