At CAS-hire.co.uk we focus on educating customers about our range of portable air conditioning units helping them find the correct model to meet their cooling requirements. Our range of portable air conditioners are ideal for computer rooms, server rooms and offices and also for cooling any other larger areas such as galleries, factories, production lines, processes , television production sets and studios. We can provide you with our knowledge and information based on over 25 years of experience in dealing primarily with air conditioning and specifically hire of portable air conditioning units.
To choose the correct portable air conditioning hire units, you need answers to the following points.
- In each individual case a heat load calculation will be required to assist determine the most suitable sized unit selection. e.g. no. of people, windows and which direction they face, lights, pc’s, servers, printers, vending machines, amplifiers, ovens etc
- What are the ventilation exhaust routes available? e.g. how many windows open, ceiling voids with ventilation, doorways etc
- Do you require moving the portable air conditioner from room to room?
- If you are moving a portable air conditioner often, you should consider the cooling needs of the different rooms that you will be using it in and try to get a model that covers all aspects your requirements best.
- A portable air conditioner that drips all condensation will need to be emptied more often, but it will exhaust warm, dry air. A unit that exhausts all moisture will never need to be emptied, but the air it exhausts will be moist, and should not be vented somewhere that this moisture would create a problem (such as a dropped ceiling).
- How many electrical power outlets do you have and have you checked you have suitable capacity available on your ring mains electrical power supply (e.g. fuse box) to accommodate more than one air conditioning unit?
- How much space is there available in each room to accommodate portable air conditioning units?
If you select a unit that doesn't have enough capacity to properly cool your room, it will probably run all the time as a spot cooler only and not lower the temperature as much as you would like. Alternatively, if you select a unit that is substantially oversized, it will run for too short a cycle, this reduces the room temperature quickly and the compressor will shut off. When the compressor cycle does not run for a long enough period to properly dehumidify your room the room will reduce temperature, but you may have a higher humidity level than you'd like. Also please note that the room sizes that each machine is rated for are approximations and high levels of sun, high ceilings, or the presence of people, computers, machinery, and the like will increase the cooling burden in the room. Also, most portable air conditioners have different fan settings to help alleviate the problem of too much cooling power.
What is a portable air conditioner?
A portable air conditioner is an air conditioner that is mobile. Unlike ceiling suspended, wall fixed, or central air conditioning units, portable air conditioners do not require permanent installation. Commonly, these units have caster wheels for easy manoeuvrability and are generally 75cm to 125cm tall.
Do portable air conditioning units require venting?
Yes, all refrigerant based portable air conditioning units require to expel hot air they remove from the room. These units generally are supplied with flexi ducts to vent the hot air exhaust to a suitable outdoors or well vented area. For example, through a wall or into a false suspended ceiling void.
Can we just let the portable air conditioning units operate properly without an exhaust duct to vent?
Portable air conditioning units are designed to operate with a flexi duct attachment. If you do not direct the hot air that is being generated by the machine outside or suitably vented area (other than the same room that you are trying to cool), the portable air conditioner will not regulate and cool very effectively at all.
What is the standard length of exhaust pipe / flexi duct hose that the portable air conditioning unit is provided with?
Exhaust duct lengths vary by model, but generally they are 4-7 feet in length. They are mainly made of a temperature-resistant plastic reinforced with metal.
Can we extend the exhaust duct / hose? We can provide extension ducts on request. The duct must be the same diameter as the exhaust hose supplied with the unit. However, we would advise that the longer the exhaust duct gets, the less efficiently the portable air conditioning unit will perform. We advise that you should avoid making the exhaust duct longer than 9-10 feet unless you hire an inline fan to attach the exhaust duct to insure the hot air can be suitably cleared from the duct. Note any 90° bends or greater turns in the exhaust duct will substantially reduce the effective length of the exhaust hose.
Can I use a portable air conditioner to cool my server room? Portable air conditioners are an excellent way to regulate and assist computer server room temperatures. Even with fixed installed air conditioning system, computer server rooms have more specific area cooling requirements than general office comfort cooling and portable units can be used to direct air flow into more specific areas.
Why do portable air conditioning units collect water? When portable air conditioners cool the air, they also dry it. The water they extract out of the air by form of condensation is collected into an inbuilt water tank or exhausted out the exhaust hose.
If I use the external drain option, how far can the water be pumped? Only our SKU155 and SKU177 models come with drain pumps- the other portable ducted models all come with gravity drains. This allows the water to only drain lower than the unit and as far away from the machine as gravity will take it. Most commonly, the drain line is run to a large bucket or water container that is then emptied regularly. If you hire our SKU155 and SKU177 models you can drain the water up to16ft away or above the height of the unit itself.
What type of electrical power supply do portable air conditioners require? All of the portable air conditioners that we carry operate on 230 Volt/ 50Hz. This is standard household voltage.
Is a portable air cooler / evaporative cooler the same thing as a portable air conditioner? No. An air cooler / evaporative cooler uses water as its cooling agent as opposed to refrigerant gas used in an air conditioning unit. Air coolers do not have a hot air duct that requires to be vented however they do require cold water to be topped up regularly to maximum efficiency. We do recommend that they are used in well vented areas to reduce excessive humidity build up.
Basic size guide
- Small rooms (up to 18sq/m or 6m x 3m) we recommend units that can offer a cooling capacity of 8500btu or 2.5kw.
- Medium sized rooms (up to 24sq/m or 6m x 4m) we recommend units that can offer a capacity of 12000btu or 3.5kw
- Larger sized rooms (up to 36sq/m or 6m x 6m) we recommend units that can offer a capacity of 14000btu or 4.1kw or greater
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All products are
equipped
with a two-speed fan and adjustable grille. 
