Replacment hvac COils
DX Evaporator Coils
Refrigeration Coils
Cooney Technologies designs DX evaporator coils to your exact dimensions, circuiting, and refrigerant, so the new coil lands in the existing footprint and gets the system back online.
AHRI, UL, and ASME certifications available upon request. Engineered & Fabricated in the USA. Trusted by thousands of facilities across North America.
Replace It Right. Leave it Better.
Designed around your unit, not pulled from a catalog
Cooney Technologies designs and supplies dx evaporator coils for new installations, retrofits, and direct replacements. Whether you have a drawing, a model number, or an existing coil that needs to be measured, our team helps verify the details before the coil is fabricated.
When a Cooney Technical Sales Representative measures your coil on site, the replacement is backed by our Form Fit Function Guarantee.
Three ways to get your replacement quoted:
Book a Site Visit
Our team can measure to guarantee dims, connections, casing, materials, access, and operating conditions for a perfect fit.
How to Measure a Coil
Blank coil drawings & how to measure a coil guide make it easy to record coil details for a quick order replacement coil.
Get a Quote Now
Already have a drawing, nameplate data, or dimensions? Skip straight to pricing. An engineer reviews every order.
Coils Options
Standard & Custom Coil Configurations
DX coils — also called direct expansion coils, refrigerant evaporator coils, coil evaporators, or simply evaporator coils — move heat by boiling refrigerant inside the tubes. Get the tube size, wall thickness, and circuiting wrong and the system never performs the way it's supposed to. We build them right.
Evaporator Coils
| Tube Diameter | Aluminum | Copper | Cupro-Nickel 90/10 | Carbon Steel | Stainless Steel 304 & 316 |
| 5 MM | 🔵 | ||||
| 5/16" | 🔵 | ||||
| 3/8" | 🔵 | 🔵 | 🔵 | 🔵 | |
| 1/2" | 🔵 | 🔵 | 🔵 | 🔵 | |
| 5/8" | 🔵 | 🔵 | 🔵 | 🔵 | 🔵 |
| 7/8" | 🔵 | 🔵 | 🔵 | 🔵 | 🔵 |
| 1" | 🔵 | 🔵 | 🔵 | 🔵 |
Evaporator Coils
| Tube Diameter | Aluminum | Copper | Cupro-Nickel 90/10 | Carbon Steel | Stainless Steel 304 & 316 |
| 5 MM | 🔵 | 🔵 | |||
| 5/16" | 🔵 | 🔵 | |||
| 3/8" | 🔵 | 🔵 | 🔵 | ||
| 1/2" | 🔵 | 🔵 | 🔵 | 🔵 | 🔵 |
| 5/8" | 🔵 | 🔵 | 🔵 | 🔵 | |
| 7/8" | 🔵 | 🔵 | 🔵 | 🔵 | |
| 1" | 🔵 | 🔵 | 🔵 | 🔵 |
• Type L Copper
• Type K Copper
• Carbon Steel (Schedule 40 or 80)
• Cupro-Nickel (Schedule 40)
• 304 Stainless (Schedule 40 or 80)
• 316 Stainless (Schedule 40 or 80)
• Aluminum (Schedule 40)
• Aluminum (.063, .090, .100, .125)
• Carbon Steel (10,12,14,16ga)
• Copper (.0647 (48oz)
• Copper (.091 (67oz)
• Copper (.125 (96oz)
• Galvanized Steel (8,10,12,14,16,18,20ga)
• 304 Stainless Steel (10,12,14,16,18,20ga)
• 316 Stainless Steel (10,12,14,16,18,20ga)
Coil coatings can help to extend the lifespan of your coil, while improving clean-ability and performance.
Coated coils are ideal for protecting coils in corrosive environments and coils with high UV exposure such as pharmaceutical and medical facilities, industrial manufacturing plants, and coastal environments.
| • Epoxy Polmer (E-Coat) with UV Top Coat • Epoxy Polmer (E-Coat) • Baked on Phenolic • Finkote 2 • Finkote 2 UV Top Coat |
• FinkoteCc • FinkoteHp • FinkoteZx • Heresite • Heresite UV • ElectroFin • ElectroFin UV |
• Blygold Anti-Corrosive • Blygold Anti-Microbial • Black Poly Coated Fin • Iridite • More Options Available Upon Request |
Built for the job
Options that match the application
If the original design isn't the right answer anymore, we can adjust the replacement around current operating conditions.
- Shaped coils: A-coils, slant coils, and custom for tight spaces
- Built to fit specific refrigerants (i.e. HFC, HFO, ammonia, CO₂)
- Custom fin spacing & connection and orientation changes
- 15, 10, and 2-day expedite options when available
DX Coil Replacement Questions, Answered.
What is a DX coil?
A DX (direct expansion) coil is the evaporator coil in a refrigeration circuit. Liquid refrigerant boils inside the tubes and absorbs heat directly from the airstream, cooling the air in rooftop units, air handlers, and split systems.
What's the difference between a DX coil and a chilled water coil?
A DX coil cools air with refrigerant boiling inside the tubes. A chilled water coil cools air with water supplied by a central chiller. DX is common in packaged and split equipment; chilled water is common in larger central-plant systems. If your system uses chilled water, see our replacement chilled water coils.
Can I replace a DX coil with a different refrigerant than the original?
Often, yes, but it is an engineering decision, not a swap. Moving from R-22 to a modern refrigerant, or from R-410A to R-454B or R-32, changes operating pressures, capacity, and metering requirements. Cooney Technologies engineers the replacement coil for the target refrigerant and reviews the circuit before fabrication.
What information do you need to quote a replacement DX coil?
Casing dimensions, connection sizes and locations, fin and tube data, circuiting, refrigerant, and capacity or nameplate data. Our measuring templates walk through every field. If you'd rather not measure it yourself, request a site visit and we'll capture everything in person.
Why do DX and evaporator coils freeze up?
Low airflow, low refrigerant charge, and low load are the usual suspects: the coil surface drops below freezing, condensate turns to ice, and the ice further blocks airflow in a self-feeding cycle.
How long does a custom replacement DX coil take?
Lead time depends on construction, materials, and current shop load, with 15, 10, and 2-day expedite options when available. The fastest way to a real date is a quote: submit your measurements or request a site visit and we'll confirm lead time with your pricing.
Need help replacing a refrigeration coil?
Send us your coil details, or request a site visit and we’ll help confirm the right replacement before it is built.