I highly recommend Carini Heating and Air if you have any kinds of problems with your furnace or air conditioning system in San Diego! This is the 2nd time I've used them, the first being when I replaced my heater and most recently when there was not enough air coming into my daughters room and the upstairs bathroom. I'm not technical enough to fully understand what they did but now the air is great in both of these rooms and everywhere else in the house. Air balancing is what they called it. As a single mom I feel very safe calling this company and everyone they sent over has been respectful, friendly and clean.