What are the two tubes coming out from an outdoor AC unit? Those are the refrigerant lines (what I would call Freon lines) that feed the condenser (the thing outside; half of a split system. The other half is the coil inside your furnace’s plenum chamber). The big one (cold) is the suction line. The small one is the liquid line (hot; no need for insulation). What do you call the part of air conditioners that is put outside? If you have a central HVAC system, then you have what’s called a split-system air conditioner. This means that part of...

What are the benefits of up-to-date HVAC systems? A general guideline is that units over 10 years old are worth replacing. If your equipment requires frequent repairs. Eventually buying a new unit is more economically feasible than constantly repairing an old one. If your energy bill is consistently going up. What they did to increase the efficiency of air conditioner? One of the best ways to boost the efficiency of your air conditioner is to keep the vents free from debris. Take some time to walk around your house and take stock of the vents. These are either going to...