How often should you have a home air conditioning unit recharged?
Whether the leak is miniscule or not is not the issue. If your system is leaking refrigerant, you must have it repaired. Any technician that puts refrigerant in a leaking system and does not identify the leak is not worth keeping. Answer is, since it is a sealed system, if the unit is losing coolant there is a problem, there is a leak. However, as a practical matter and since the leak may be miniscule, having your system checked every couple of years is not a bad idea.
measuring how effective your air conditioning is at the supply air diffusers will not be an accurate gauge of it's function. The temperature measurements should be taken just above and below the evaporator coil. The return temperature (below the coil, if not possible, then upstream of the blower) should be 15-20 degrees Fahrenheit higher then the supply temperature. Keep in mind that this temperature difference is affected by the blower speed as much as it…
There are many places to go to for information on heating and air conditioning in Toronto. One can start with Home Depot to get some advice on they type of air conditioner they would need for the size of their home. One can also go to smaller dealers such as Reliance Home Comfort to find out about their options regarding HVAC.