Matthew has sent in a guide to their successful modification of a Matsui MAT-7KACW: Dual Hose Adapter Infiltration air heat transfer is a major inefficiency of a portable AC system. Its effect is much more pronounced when outdoor air temperature is higher . Under old standards and guidelines single hose portable AC units could be tested at any outdoor temperature. It stands to reason that manufacturers would choose to conduct this testing at lower outdoor temperatures to boost the measured cooling capacity of tested units. Noise levels. All air conditioners in operation make a fan-like noise, but they vary by as much as ten decibels, which could make all the difference when you’re trying to sleep.

Some air conditioners have inbuilt carbon filters to automatically produce clean and healthy air for your family. The cooled air is purified with the help of activated carbon filters. These filters are excellent for fighting germs and bacteria and help keep the immune system high. They are also highly effective at removing odours from the air since they are electrostatic filters. The running costs of around 25 to 35p per hour will seem reasonable value for money the next time temperatures rise. Most have a Class A energy rating.in the room should be cool to the touch and feel like a fridge. Further tips for optimum efficiency Energy saving features. Timer switches, eco modes and sleep modes feature on most models. ‘Smart’ air conditioners will link to a smartphone app or voice assistant, enabling even more control over the room temperature. In a central air conditioning system outdoor air is pulled over the condenser via a large fan. The outdoor air may be hot but it’s not nearly as hot as the condenser – i.e. it’s colder than the condenser. This facilitates heat transfer from the condenser to that warm outdoor air. Heat added by ducting is also a major inefficiency. Old guidelines didn’t account for this inefficiency. New testing This means that you can compare the SACC of a single hose unit to that of a dual hose unit and the SACC alone will tell you which unit has a greater cooling capacity – which unit will be able to cool a room faster and to a lower temperature.

Most importantly, note how the equations above fully take into account the major inefficiencies of single hose units: The evaporator is cold – it removes heat from air that travels over it – this is how an air conditioner cools air. Portable air conditioners are absolutely essential for hot summer days. The weather in the UK can be extremely unpredictable, and with the warm months upon us, portable air conditioners are a boon. Living spaces, hallways, bedrooms, and children’s rooms can be kept cool at all times. The decision regarding type and style of the portable air conditioner ultimately comes down to the volume of the room, the people using it, and the features that the machine can offer. The temperature sensor allows the unit to calculate how much hot air needs to be extracted and gauge the amount of fresh air required to reduce the overall ambient of the room. You can also set this manually by selecting your preferred temperature.

Do you have a Power of Attorney? MoneySavingExpert.com founder Martin Lewis explains how this crucial protection works, why it's more important than a will, and how to get one in the latest episode of ITV's The Martin Lewis Money Show Live. Air conditioners work by pulling hot air from one area and expelling it as cold air into another. Most people believe that air conditioners expel cold air. While this is untrue, the principle is mostly the same. The only difference is that cold air is not made. Hot air is cooled via conditioning. In a central air conditioning system the hot side of the system is outdoors – the condenser is outside the house. So a 10,000 BTU/hr air conditioner essentially has the ability to remove the equivalent amount of heat from a given quantity of air that would be required to heat 1 lb. of water by 1° F 10,000 times over in one hour. Old Testing Depending on how many British thermal units of heat a particular portable air conditioner could remove from the air in the test chamber per hour, it was given a particular BTU rating – 10,000 BTU units could remove 10,000 BTUs per hour; 12,000 BTU units could remove 12,000 BTUs per hour, etc. Heat Transfer in AC Systems

Front view of Delonghi Pinguino EX120 converted from single hose to dual hose. Side view and boxing of Delonghi Pinguino EX120 converted from single hose to dual hose. Matsui MAT-7KACW Plus, a portable heat pump's energy efficiency is very high. On average, heat pumps use one unit of electricity for every three units of heat they produce. That means they're 300% efficient. For comparison, electric radiators are only 100% efficient. Both are 14,000 BTU units according to the old standard for measuring BTUs. Using SACC, we can clearly see how the Whynter has a better cooling capacity compared to the Honeywell.In a dual hose system, the same process occurs. The unit may not intake exactly the same amount of air from the outdoors as it exhausts. In addition, it may also intake a small portion of cooled indoor air to cool its condenser. All of this may create at least a small pressure gradient between the conditioned room and the outdoors. In a dual hose system, heat added to the room via infiltration air is not nearly as substantial, but it still needs to be accounted for. Duct heat transfer Fan Mode: Fan modes are excellent for additional circulation and ensuring that the room remains dry. Sometimes the conditioned air can make the room feel stuffy. Fan mode helps combat the stuffiness and heaviness. In a dual hose unit, warm outdoor air is pulled over the condenser much like it is in a central air conditioning system. However, here the outdoor air is pulled into the AC unit via a (second) duct. The outdoor air is warm but, again, it's cooler than the condenser so it can still cool it. Cooling the condenser adds heat to the air and this heated up air is exhausted via an exhaust duct much the same as it is in a single hose unit.

Air conditioners differ by performance. What this means is that each air conditioner is different from the other in terms of its output performance level. This difference is as follows:In the past, you would compare a 14,000 BTU single hose unit to a 14,000 BTU dual hose unit and you would be inclined to opt for the dual hose unit solely because it’s a dual hose unit. Dual hose units were supposed to be the more efficient option because they mitigate the effects of infiltration air with the addition of a second hose to the system.