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Water-Cooled or Vented A/C?

As with water-cooled air-conditioning systems for the residential market, where traditional split-systems are either not desirable or permissible then twin-vented systems are the most popular choice and have seen a boom over the last year as the favoured choice for garden offices in particular due the change in popular working practices as a result of the pandemic. 


There are several manufacturers on the market offering similar solutions however it is our belief that the Powrmatic Vision range offers the best overall solution and we outsell these by a factor of 20:1 over alternate manufacturers.  With low-carbon impact and an energy saving ratio of almost 3 to 1, the Vision DC Inverter technology, capacities are optimised so to have the best comfort with the lowest power consumption and noise level making these systems a very popular choice.

These all-in-one vented systems are a stylish and economical choice of both heating and cooling your space in a very energy efficient manner and we provide a full supply and installation service normally completed within only one day avoid disruption to you as a preferred contractor for Powrmatic.

Whilst the vented systems are currently the most popular, Powrmatic's Vision H20 (Water-Cooled) systems are at least as impressive in that they offer even more performance in the same sized unit without the need for any outside penetrations whatsoever (hence there should be no planning requirements necessary).  There is normally a more involved installation process making the systems more expensive to install initially, but they are very cost-effective compared to the other manufacturers currently available in our experience.  Again, other manufacturers offer water-cooled systems but none with the space saving and other characteristics of the Vision H20, which has a very low water use profile and consequent running cost for this type of system.  Please refer to the technical data in the Powrmatic brochure on the products page.

Pros of Water-Cooled Air Conditioners


Since they don’t have to run as often to keep the inside air cool, water-cooled air conditioner units typically use less energy than air-cooled air conditioners.

Consistent Cooling

Water-cooled units constantly circulate air into a space, but they don’t discharge hot air, unlike air-cooled units, which need an exhaust vent to expel hot air outside.

Good in Extreme Heat

Water-cooled units are typically operable between 18 and 40 degrees Celsius and are more effective in top temperatures than air-cooling units.

Size and Placement

Water-cooling units tend to be smaller than air-cooling units, and since they don’t require an external air duct, they can be portable and have more options for placement.


Water-cooled units produce colder air more consistently.


Water-cooled air conditioners are the most effective choice in rooms with limited space for air conditioning or rooms without an air duct for exhaust air to move in and out. These can be an excellent choice for residential air conditioning and large buildings.

Cons of Water-Cooled Air Conditioners


Water-cooled air conditioners must have access to a power source, a water source and a drain to eliminate wastewater unless in a more expensive heat-pump closed-loop system.

Water Waste

A constant flow of water is required while the unit is operating, which can result in a substantial amount of water usage, which can be more expensive and may require a larger water supply for more significant buildings if demand is high at the same time for all units in operation (hotels for example).

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