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Fresh air taken through the air handler ensures pressurization and ensures AC air leaks out through any crack or opening.

Fresh air taken through the air handler ensures pressization and ensures AC air leaks out through any crack or opening.

When the refrigerators and car Ac's are with R-134a It can be used for residential also. Only reason I could apprehend is the most of the coils / chasis for WAC are made for R-22 and probably R-410...

Limitations of evaporative cooling are it cannot be used where the relative humidity level is high like in most of the coastal towns.

For evaporative cooling to be effective you need wet bulb depression i.e. difference between dry bulb temperature and wet bulb temperature . Higher the difference(wet bulb depression evaporative...

Relative humidity level of around 50% should be comfortable for human comfort and if the chilled water temperature is 7 degree C it should do the job.Again it depends on the outside air quantity as...

You can find out the moisture removed if you measure the incoming air moisture content and leaving air moisture content and at the air quantity to find out the water removed

Relative humidity will be high if the unit is oversized or when the internal heat gain is lower than whjat is considered.
If the indoor air handling unit is belt driven we can recalculate the load...

Are we not doing wrong selling? Customer might have taken respsonsibility and in the initial years it may work as most of the AC units are soversized due to Ambient variation and load variation....

Getting Fresh air is difficult unlike in central system is not feasible in MINI SPLIT OR WINDOW Units. The moment fresh air is not added two things which are important gets defeated i.e. 1 Fresh...

if it is thirty years old it must be energy guzzler compared to the current version equivalent machines. The compressors equipped may be semi hermetic or hermetic reciprocating which is out dated...

Check air quantity which may be low then also humidity can be low. the reason for air quantity lower may be fiter is blocked.
Check cleaning filter and see any improvement

Shift the humidistat below 1.8 M from floor so that the room humidity is sensed rather than return air which may be mixture of fresh air and supply air where the present humidistat is located.

it...

Basically flexible duct shall be restricted only maximum 1 to 1.5 Meter long 20 feet is almost more than 6 meters which is technically not correct.20 feet of surface area of the duct oustide is...

Crank case heater is must to ensure the refrigerant with oil does not affect the compressor and its lubrication.Many of the scroll compressors atleast at lower capacities are not provided.

Elephants also slip some times. The leak must be at Brazing joint.If it is in copper tube it may be due to corrosion as we have seen some of the cold room used for animal house the copper cooling...

Yes Mr.Joe is correct the charge of power element will be different for R410 a & R-22.

Sorry for misleding the form.

As long as the anbient does not go higher it may work. At higher ambient the pressure difference may be high affecting the performance.

Lee Iaccoca In his autobiography suggest to get into Fod Business whenever Recession is there as every one has to eat sandwich.

If you are HVAC& R Professional You can teach the local technicians...

Even if the filter is dirty noise will come as I have observed in many units or the duct may not have vibration isolation by way of flexible canvass.

With background you have may not be adequate for maintenance company as it is labour intensive and required skilled technicians if you have survive and sustain in the competitive market.
Best for...

Check velocity across filter if it higher than 400-500 feet per minute then also static will be high.

please get the temperatures at Return air both dry bulb and RH% or wet bulb temperature, The similar readings at otlet i.e canvass and also room.
Check the supply air and return air ducts are...

please get the temperatures at Return air both dry bulb and RH% or wet bulb temperature, The similar readings at otlet i.e canvass and also room.
Check the supply air and return air ducts are...

Naturally as first floor is there the Ground floor does not go beyond 80 degree F.For the first floor what is the roofing assuming it is Galvanum or sheet even though you may have insulation it would...

Basically all the drain shall have U trap so that the water seal is maintained to prevent cold air going out as well as outside air coming inside.

Height of U trap shall be slightly more than fan...

Earlier days many company had a philosophy of meeting implied needs after ascertaining the needs whether it is new one or Retrofit. Offcourse they would have charged accordingly after all the...

What is Techview kindly enlighten me

Ask for Service Back and check from existing users the service quality.

recently in one of the site where there are 12 number RTAA air cooled chillers. One chiller was burnt and cause is not clearly identified.Probable cause attributed is solemoid on the compressor short...

can some one elaborate how filter can be used for long time .My understanding is once black soot is formed on any filter it has to be replaced. How black soot is removed by cleaning? I am looking for...