Air ducts lose or gain heat whenever your hvac equipment is running. If the temperature inside your duct is different from the air outside, then a heat loss or gain will occur. This loss or gain is something that needs to be considered when designing
Let us say your trusty old furnace reaches the finish of their existence. You need to buy a replacement, which means you call your heating and cooling company plus they hurry to make certain you do not freeze throughout the following cold snap. They'