Coil Company replacement coils are designed as an UPGRADE and improvement to the original manufacture’s heat exchangers, either Microchannel type or Fin/Tube type. While many OEM’s use foreign-made or “automotive” quality coils or thin wall fin/tube, Coil Company builds in long-life quality. The heat exchanger “Upgrade” feature is due to thicker tube walls, a more robust design to withstand thermal cycling, and E-Coating to assure long life corrosion protection.


Secondary surface (fins) are of the plate-fin design using aluminum or copper, with die-formed collars. The fin design is to be flat, waffle, or sine-wave in a staggered tube pattern to meet performance requirements. Fins are to be free of oils and oxidation. Collars will hold fin spacing at the specified density and cover the entire tube surface. Aluminum properties are to be Alloy 1100 per ASTM B209, O (soft) temper. Copper is to be Alloy 11000 per ASTM B152-06 with a soft (anneal) temper.


Coil casing material shall be of G90 galvanized steel, 16 gauge minimum. Heavier material, stainless steel, copper, or aluminum casings are to be provided as required. Intermediate tube supports are to be provided on all coils 50” and longer fin length. Coil casings on the top and bottom of coils are to have double-flange construction, allowing for vertical stacking of coils.


Tubes and return bends shall be constructed from seamless UNS C12200 copper conforming to ASTM B224 and ASTM E527. Properties shall be O50 light annealed, with a maximum grain size of 0.040mm. Seamless tubes are to be mechanically expanded into plate fins to form an everlasting bond between primary and secondary surfaces.

Pressure Testing

Coils shall be tested at 550 psig using dry nitrogen, submerged underwater. Dual-operator verification shall determine that all coils are leak-free. Coils shall be certified to withstand 750 psig working pressures.


Evaporator coils shall be designed with brass liquid distributors (as required) and copper sweat suction connections. Distributors shall be capped using soft-solder for ease of cap removal; suction connections shall be capped.


Headers are to be constructed of seamless UNS C12200, Type L copper material sized to match specified connection size. Headers are to have finished integral spin-closed ends designed to withstand test pressure.

Materials and Specifications

Tube O.D.
Tube Thick
Fin Thick
Optional Tube
.016 | .022
.025 | .035 | .049
Optional Fin
.006 | .0075
.0075 | .010
.0075 | .010
Fin MaterialAluminumOptional -Copper; Stainless Steel
Casing Material16 gauge Galv. SteelOptional - 12, 14, and 18 Gauge Galv. Steel •
12, 14, and 16 Gauge 304 & 316 Stainless Steel • 14 Gauge Aluminum
Tube MaterialCopperOptional - Stainless Steel, Cupro Nickel, Carbon Steel
Connection MaterialCopperOptional - Steel, Red Brass
Header Material CopperOptional - Stainless Steel, Cupro Nickel, Carbon Steel


The equipment we build is specially made to meet your exact engineering requirements, but we also understand time critical projects require quick turn around. Our expedited production program allows us to offer coil shipments in as little as 10, 5, 3 and 1 working days guaranteed.

20 Business Days
Standard Shipment
10 Business Days
Added Premium
5 Business Days
Added Premium
3, 2, & 1 Business Days
Call for Pricing & Availability


We strive to provide the most stress-free and easy to complete process in the industry. With every purchase, we provide a product-specific Installation, Operation, and Maintenance manual to help guide you through a lifetime of easy operation. Should you have any questions about your product you can contact us for further assistance.


Want to know more? Here is the full product spec sheet that lays out product-specific details that can make a difference when it comes to your system performance and longevity. If you're not seeing exactly what you need, you can reach out to one of our highly trained sales engineers and we will take it from there!


Not sure exactly what you need or how to ask for it? Fill out this easy to use step by step guide, that when completed will provide all the necessary information to our highly trained sales engineers. Not sure how to find the information needed in the drawing? Check out our how-to videos on coil measuring and drawing completion!