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Air Conditioning Systems

From small air conditioning systems suited to shops and small offices to large equipment cooling for data centers, Metropolitan can install a variety of modern air cooling systems for any commercial space. Find out more about the cooling technology we can install below.

Typically, air conditioning units for smaller commercial spaces where only one or two internal units are required are called split systems. A split air conditioning system consists of one or two internal units and an external condenser, which is placed outside of the room you wish to cool or heat.

Heat pump systems provide the capability of either cooling or heating the space, which make them ideal for smaller commercial spaces.

Indoor units come in an array of different setups, wall-mounted, under ceiling cassette, floor standing, 1, 2 or 4 way cassette or concealed within a ceiling void.

The outdoor unit contains a compressor and a condenser coil, while the indoor unit contains an expansion coil, an air filter and a fan.

Why should you choose a split air conditioning system?

Split air conditioning systems provide a fantastic solution for a space that requires accurate temperature control, whereby a heat pump system can provide both heating and cooling depending on the requirements at the time giving the user complete control of their environment at the touch of a button.

With various brands on the market offering a huge range of styles for the indoor units, at Metropolitan we are an approved install of all systems so we can meet your specific design requirements. Some of the brands we use frequently include Mitsubishi, Daikin, Toshiba and LG. To find out more about what system would be best for your commercial space, get in touch.

Large commercial air conditioning systems

Larger commercial buildings such as shopping centers, large office spaces and banks have many different air temperature requirements than their smaller commercial counterparts. From the sheer volume of people to the usage of a huge array of lighting and technology designed to be on display throughout the day, how large spaces such as these are cooled can be expensive and complex.

In many large commercial buildings where a centralized plant system is already in situ, these systems will use a central chiller that cools water which is subsequently distributed around the building through various pumps and heat exchanging equipment and cools the space via a number of indoor units, known as fan coils.

Much like smaller commercial spaces, heating the space is just as important as cooling, so low temperature hot water (LTHW) is also run in parallel to the chilled water, heated by a central boiler plant and then routed into the same fan coil units. Temperature sensors within the space then modulate the control valve on both the LTHW & Chilled water coils, thus controlling the temperature of the air feeding the space.

In some instances, a centralized plant system is not the most efficient way of providing cooling to a space, which is where a larger refrigerant-based AC system fits in, commonly referred to as a VRV or VRF system.

What are the advantages of an air conditioning system served by centralized plant?

In a large building where we need to control the amount of equipment being used to control temperature, a centralized system can be most efficient. This minimizes the amount of equipment requiring maintenance and can also significantly reduce energy consumption, as all the heating or cooling of the water is done once, rather than in various condensers due to having a number of AC systems installed.

Much like a split system, there are various types of indoor unit, from floor standing down flow or up flow unit’s serving a computer room or data center, to ceiling mounted fan coils which utilize ductwork to distribute the conditioned air to the space.

Metropolitan work with a number of successful large commercial AC manufacturers such as Dunham Bush and Ability. To find out which system would be suitable for your needs, get in touch.

What are the advantages of a VRF, VRV or Hybrid air conditioning system?

Much like a split system, a VRV or VRF system consists of an outdoor condenser unit, but this is larger in size and allows for the connection of a number of indoor units, cooling a larger area than a traditional split system.

This system will also allow for simultaneous heating or cooling of individual indoor units, for instance one room requires cooling but a different room across the corridor requires heating, this can be achieved from one system.

There are some limitations to a refrigerant based system, for example length of pipe run (generally a max of 100 meters), plant space and noise. Where these issues prevail, the latest technology is a hybrid system that uses water as opposed to refrigerant and combats these problems.

Water is incredibly more effective at absorbing energy (in this case, heat) than air, and is consequently distributed to the fan coils where it can absorb as much heat as it can. The water is then sent back to the chiller system where it can be regulated and heat is removed using a cooling tower. This cycle is repeated over and over in order to keep large buildings at a steady temperature. The VAV is what controls how much air you pump into the building, thereby providing temperature control which you can monitor and change.

The main advantage of this is that it is the most cost-efficient method for large commercial buildings as the electrical output is extremely low.

One of the main benefits of using water to chill a large space, however, is that it’s non-corrosive; meaning it’s not hazardous to humans. What’s more, chilled water systems distribute water within a closed loop that is never exposed to external elements and, as such, does not need any chemical treatment. This results in another cost-efficiency when compared to using other, more costly, refrigerants.

Equipment cooling for computer rooms or data centers

Computer room air conditioning, commonly known as a CRAC, is one of the most fundamental working elements of any large data center. Without it, servers and mainframes could easily overheat resulting in a loss of business. CRAC units monitor a computer room’s climate, from temperature control to humidity to air distribution.

CRACs are able to cool large servers and mainframes by passing air over an inbuilt cooling coil and distributing to the room either at high or low level.

Metropolitan frequently install these systems as manufactured by the market leaders such as Uniflair, Flaktgroup, Denco and Vertiv to name a few. To find out how we can set up a CRAC unit that’s bespoke to your data center’s needs, just get in touch.