Choosing the Right Air Conditioning System
Air conditioning is a well-known and popular means of controlling the temperature of an internal space and is used in many applications.
We all agree that air conditioning systems are a welcome addition to an office or home, especially during our hot South African summers.
The most common air conditioning units in use today are split types, which means that the condenser (outdoor unit) is separate from the evaporator (indoor unit). The two parts are connected by piping which transfers the energy back and forth by refrigerant gas.
This means that the condenser can be placed some distance away from the evaporator unit which makes it quieter and more aesthetically pleasing, although their placement is limited by pipe run length.
What to consider when selecting your cooling solution:
• Capacity (Cooling/heating power) A usual guideline is 600 – 650BTU’s/m²
• Operational noise, inside and outside
• Physical positioning of units, both inside and outside
• Aesthetic Appearance
• Going off the grid
Mid-Wall Split Air Conditioning Units
Mid-wall splits blow air in one direction from the wall they’re mounted on. They are sometimes considered obtrusive as they jut out from the wall. They range from 9000 – 24000 BTU’s.
Under-Ceiling Split Air Conditioning Units
Under-ceiling units are often used for large halls or server rooms where large heat loads are found. Whilst they blow in just one direction like a mid-wall they offer greater reach and therefore cover a larger area, which means that their cooling or heating impact can reach much further away, covering a greater area.
Output capacities range from: 18000 – 60000 BTU’s, often doubling the capacity of the largest mid-wall unit. Under-ceiling units are also considered obtrusive as the whole body of the unit is exposed in the room. They offer longer pipe runs than mid-walls units.
Cassette Split Air Conditioning Units
Cassette split units are often used in commercial applications where large numbers of people are stationed, and they distribute air evenly in multiple directions.
Some manufacturers also produce round cassette units which are excellent in delivering controlled air in an even spread.
The primary advantage of a cassette unit is that the body of the unit is recessed into the ceiling making it a completely non-obtrusive installation.
Output capacities range from: 18000 – 60000 BTU’s
Ducted Hide-Away Split Air Conditioning Systems
Ducted units are are versatile in their applications. The advantage are that they supply air to multiple different areas, offer more aesthetically pleasing finishes and have lower operating noise.
These units also come in very large output options and again, concealment is a huge advantage! Output capacities range from: 24000 – 96000 BTU’s
VRF/V (Variable Refrigerant Flow/Volume) Split Air Conditioning Systems
This is considered the ultimate in HVAC energy saving and aesthetic design. VRF/V systems incorporate a single condenser into multiple evaporators.
Computerised sharing of heating and cooling loads results in up to 50% energy-saving (IE: Heat recovered from hot zones is diverted to cold zones) VRF systems offer unparalleled flexibility in their placement of outdoor units – ideally suiting modern architecture.
Moreover, with just a single outdoor air conditioning unit to a small office or home, the outdoor aesthetic is unparalleled!