RAE Corp

ABOUT RAE COILS

Discover the Difference
Many manufacturers claim they have fast delivery and quick response times, but fail to follow through on their commitment. Our customer service will exceed your expectations. We respond with prompt pricing information and standard lead times of 10 to 15 working days. Your emergency coil needs can be met with our 5 Day Express shipment program! We provide quick, accurate, and dependable information when you need it… NOW.  

Quality
We have been building our quality reputations since 1971. This is evident by a product that meets your dimensions, performs according to your specifications, and arrives on time. Our quality control is not a “department,” it is a way of doing business!  

Meeting Customer Needs and Solving Problems
Every day we look forward to meeting your technical needs, helping to solve your budget and delivery problems, and providing you with the product you deserve. Our sales engineers work to match your specifications to your budget requirements while our manufacturing technicians strive to be on time every time.  

It’s as Easy as 1, 2, 3
We can duplicate or reproduce virtually any type of coil regardless of size, age or origin. Just give us the size of the existing coil and we’ll do the rest. Our entire organization is ready to work for you!!

PRODUCTS

Chilled Water Coils
Chilled water coils are most often used in commercial buildings. Chilled water coils respond to the cooling effect of surfaces when wet by moisture condensed from the air. The sum of sensible heat transferred by a dehumidifying cooling coil represents total heat values. Sensible heat transfer, whether cooling or heating, refers to the change in dry bulb temperature only. The system characteristics that affect a chilled water coil's performance are gallons per minute, velocities, and temperature ranges of the fluid through the tubes as well as the cubic feet per minute, velocities, and temperatures of air across the coil fins.

Hot Water Coils
Hot water coils, due to the ability of the water to freeze, will generally be found in a reheat portion of a heating system. Normally this insures that air below 35º will not come into contact with the reheat coil at a temperature between 45º and 75°. Hot water coils are typically located in duct work where zone heating takes place.

Steam Coils
Steam Distributing coil applications are primarily for below freezing air applications.  The inner distributing tubes supply hot steam down the entire length of tubes, thus warming the condensate that has been formed inside the tubes.

Standard Steam coil applications are for above freezing applications.  This coil requires standard oversized holes in tube sheets for expansion and contraction requirements.
Most HVAC preheat coils use 100% outside air with low pressure steam.  In very large HVAC systems, longer coils (over 60" long) are required to meet the performance.  These longer lengths could cause the 5/8" steam distributing coils to clog with condensate.  This clogging reduces capacity because steam and condensate may take up the same space at the same time. It also may cause condensate freeze up.  Therefore, 1" steam distributing coils are recommended for these applications.

DX Coils
DX coils are commonly used in air conditioning refrigeration applications and many types of commercial refrigeration systems. Air to be cooled or dehumidified is circulated through the finned surface. Multiple rows and various tube patterns are used to achieve the desired heat transfer from the air to the circulating refrigerant. Copper tubes with copper or aluminum fins are most commonly used for efficient heat transfer.

Air conditioning systems need to operate efficiently at maximum design loads as well as partial load conditions. Many types of system capacity controls are used to match the load requirement with system capacity. With refrigerant evaporator coils, this generally takes place in the form of surface reduction and/or one of the following:

• Single Circuit
• Face Split Circuits
• Row Split Circuits
• Intertwined Circuits

VAV (Variable Air Volume) systems use buildup coil banks or large air handling units with one refrigeration system. To balance system capacity to load requirements, some form of face or row control is required. During the time of reduced capacity, it is imperative to maintain a fully active dehumidification process at the heat transfer coil. This is best accomplished by row control on standard DX coils or by use of "intertwined" refrigerant circuits. Row control is used for partial load surface balance. Whichever circuit is deactivated first results in full face area operation of the remaining circuit, keeping the full volume of air in contact with active coil surfaces.

Booster Coils
RAE Corporation is pleased to offer 61 different sizes of stock booster coils. Many of the sizes are the headerless type in order to accommodate minimal GPM flows and to keep water velocities above laminar flow situations. However, on several of the larger sizes, headers are used in order to minimize water pressure drops and maximize capacities. Booster coil sizes range from 6" x 6" to 24" x 48" and are available in both one and two rows deep. With such a wide range of sizes, RAE Corporation should be able to cover many of your reheat applications needs with our stock booster coil program. Give us a call today, and we will have your order shipped out within 24 to 48 hours.

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Equipment Direct Sales, Inc.
20 Scanlon Drive
Randolph, MA 02368
Phone: (508) 580-4466
Fax: (508) 580-2996