why do digital thermostats have both heat and cool settings, as opposed to a singular temperature control

Question

(e.g why does 70 degrees on “cool” feel colder than 70 degrees on “heat”)?

In: Technology

Answer 1

70 is the goal temp, but HVAC systems use much cooler or much hotter air to efficiently get the temp to that level. An AC might blow 40 degree air, while a furnace blows 100 degree air. Each does do until the hot/cold air mixes with the ambient air to hit the desired temp.

Also, an AC turns on and cold until temp drops to 70, while a furnace turns on to warm until it heats up to 70.