Ultimately, it should be whatever temperature makes you comfortable, but I'd say a normal temperature would be around 65 degrees or so.
Whatever it is set to on your heater's control keypad.
55 degrees above zero Fahrenheit
Depending on the year, make, model along with if it has single or dual a/c systems and what the outside temperature is, it can be between 36 to 48 degrees...... Simply, the A/C vents temperature should be whatever you set the thermostat as.
One way to tell if you're low on coolant on a central AC unit is to feel the air coming out of the vents. If the air is warm or room temperature, it is a sign that you are low on coolant.
replace? why not fix it?
Turning the thermostat to a higher temperature does not make the air coming out of the vents hotter on a central AC with a heat coil. The temperature setting on the thermostat simply tells the system when to stop cooling or heating, but it doesn't affect the actual temperature of the air being produced. The heat coil or furnace is responsible for heating the air, not the thermostat setting.
no
Coming out of the vents around 43 degrees
There should be at least a 12 degree split between the incomming air and the air comming out of the vents.
yes it would save money :)
Smoke could be coming from the vents of your car for a number of reasons. You may have an internal car fire.
Types of volcanic vents include central vent, fissure vent, and parasitic vent. Central vents are the main opening from which lava and gases are expelled. Fissure vents are elongated fractures in the Earth's crust from which lava can erupt. Parasitic vents are smaller secondary openings located near the central vent through which additional lava may be emitted.