(e.g why does 70 degrees on “cool” feel colder than 70 degrees on “heat”)?
In: Technology
Most people have covered the whole AC and furnace thing, I wanted to go over how a house HVAC works in comparison to a car HVAC (assuming both as a new-ish model) because I think it’s important to know this to understand the other answers.
Your car HVAC tries it’s best to output air at the temp that you set it to. So if you set it to 70, it tries to output 70 degree air, regardless of what temperature it is outside (or inside).
In your house HVAC, you set the temperature that it starts/stops at. The heat and cool setting determines the min or max of the setting you chose.
Example: if it’s 75 degrees in your house and your thermostat is set to 70-cool, the AC turns on (because it’s higher than the max) and shuts off when the thermostat reaches 70 degrees or less.
Set it to 70-heat and nothing happens because it’s already passed 70. However, when the sun sets and temperature drop to below 70, the heat turns on (because it’s now less than the minimum). Until it reaches 70, then turns off.
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