Indoor

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In a perfect world, most cooling coils should operate efficiently for twenty years or more. Lack of proper maintenance, inappropriate applications, corrosion, and less-than-stellar modern-day construction all affect the life expectancy of cooling coils. There are three major reasons for premature cooling coil replacement as follows:   Increased air resistance due to the plugging of the coil surface. What causes this plugging? There is an increase...

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Hot Water Coil

Water Cooling and Heating Coils   Water is the most widely used heat transfer medium because it’s readily available and low in cost. Water can be used as a heat transfer medium if the temperature range is between 15 degrees Fahrenheit (when mixed with glycol) when cooling and a high of 210 degrees Fahrenheit when heating.   Chilled Water Coils   When maintaining an acceptable living or working condition in...

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Basic Horizontal Unit

Many fan coil unit installations are in condos, apartments, townhouses, hotels, and other types of lodging. Most systems are two or four pipe heating/cooling systems and usually use chilled water for cooling and hot water for heating. These units can be permanent or temporary residences occupied by an owner, tenant, or paying customer, which may mean they are more demanding.   There are 3 types of units...

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Coil Delivery

Replacement coils are different than most parts of an air conditioning or heating system. Replacement coils are not in stock and will need to be fabricated. You can select thermostats, valves, fan parts, and even compressors in stock, but rarely an HVAC coil. Today, there are a lot of alternatives available to replace coils, but how many have a successful history and a precise system to...

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Indoor Central Station Air Handlers

  For years, owners have looked at dilapidated, rusted out air handling units in their mechanical rooms and thought, “If I could only get rid of this old unit and replace it with a newer, more sophisticated design.” This is possible, provided you stop listening to the usual pitch by those who tell you to rehabilitate the old unit. After rehabilitation, you are still left with...

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