Ductless mini-split HVAC systems offer greater flexibility compared to whole-home units, making them ideal for rooms where large systems, including window-mounted units, won’t fit. However, it has its limits. In today’s post, OK Heating and Air Conditioning takes a look at the places that ductless mini-split HVAC systems shouldn’t be installed in.
Areas To Avoid
Like whole-home HVAC systems, ductless mini-splits are split into two units. The outdoor unit houses the condenser, while the indoor unit houses the evaporator and air handler. Unlike window-mounted systems, ductless mini-splits do not require a large opening to bridge the two units — a hole that’s big enough to accommodate the piping is all it needs. This provides greater flexibility in where the outdoor and indoor unit can be placed, as the length of piping (for power, refrigerant and moisture) can be variable. The following are some of the areas you will want to avoid for placement:
- Areas that obstruct airflow. The outdoor unit requires airflow to expel heat gathered indoors, so it must not be placed in an enclosure. The indoor unit likewise needs to have good airflow to properly cool (or heat) the room, so it must never be placed behind furniture, curtains or doors.
- Areas that receive direct sunlight. HVAC systems are designed to withstand most weather conditions, but protecting them from the elements can help prolong their service lives. This is why HVAC companies recommend placing the outdoor unit out of direct sunlight. A small awning or shed would work, provided that the sides are open to allow airflow.
- Unstable surfaces. If you must mount the outdoor unit on the ground, make sure it’s placed on a level and stable slab or concrete pad. The motors inside generate a lot of vibration, which can result in the unit falling over.
General Placement Tips
Here are a couple more tips for good ductless mini-split HVAC system placement.
- Think about maintenance access. You’ll be doing basic maintenance tasks like cleaning the air filters and inspecting the piping for leaks, so you’ll want to make sure both indoor and outdoor units are within reach.
- Avoid bare patches of soil in your yard. During dry seasons, soil can generate a lot of dust, some of which will likely end up in the outdoor unit. As described above, it needs good airflow to remove heat from the condenser coils; dust and dirt would be like an insulating layer that would slow down heat transfer, affecting the HVAC system’s efficiency.
Call OK Heating for Your HVAC Needs
Planning on getting a ductless mini-split? How about a new gas heater? In either case, give our team at OK Heating and Air Conditioning a call at (925) 371-2665. You can also fill out our contact form to schedule a free estimate.