When we’re buying a home in San Diego, we know that our AC and heating unit is called an HVAC system, which stands for Heating, Ventilation and Air Conditioning. There’s an entire glossary for HVAC, but what we don’t know are specific terms that identify designs within the HVAC system. We’re going to tell you all about a ductless mini split air conditioner and guide you on how to buy one.
What is a ductless mini-split?
In simple terms, this means that part of the unit is inside and part of it is outside. Typically, the outdoor device is known as the condenser and the inside device is the evaporator. The line units connect these two devices together to cool different zones of the home. This isn’t quite a central air conditioning system, but it’s similar. You can use either one device or both to cool the area and your inside unit could easily be mounted to either the ceiling or your walls.
Remember that you must also purchase tubing when you decide to install a ductless mini-split. These tubes will make sure your outdoor and indoor units are connected. Without these tubes, you will not be able to run your units together.
What does “zone” mean?
A zone is a room. If you have multiple rooms and lots of walls, rather than an open concept, you’re going to have to count each room as a zone. When you have more zones, you need more BTU’s within your air conditioner. Typically, you’ll have one indoor unit per room if your space is large, but remember: the larger the room square foot wise, the more BTUs you’ll need. If you know the size of your room but now how many BTUs you need your air conditioner, there are plenty of online calculators that can help.
There are single and multiple zones, as well. The outdoor unit may be for only one zone in your house, whereas there are other units that are meant for multiple zones indoors. If you want everyone to stay cool, make sure you purchase and install a cooperating outdoor unit.
Can I use multiple units at the same time?
If the BTUs of the units inside add up to a BTU number that is larger than your outdoor unit, then you cannot run every unit at the same time on maximum. This will short out your air conditioner system and it will not work.
Can I install it myself?
Ductless split air conditioners should be installed by a licensed HVAC contractor. San Diego has plenty of them. You cannot install these units yourself, as they must follow regional and state codes. However, this type of unit is much less complicated to install than central air but it’s not as simple as your normal window AC unit.

Posted by airmakers 

