In-house component · Heat exchanger coils
The coil is the product.
So we make it ourselves.
Evaporator and condenser coils are built on Ezentech's own lines — fin pressing, hairpin bending, tube expansion, brazing and leak testing under the same roof as the units they go into.
Why in-house
Tolerances travel
with the coil.
A fin-and-tube coil sets the cooling capacity, the airflow resistance and, with the expansion device, the rated ISEER of the finished unit. Buying it in means inheriting someone else's fin pitch, tube expansion and brazing quality.
Ezentech presses the fins, forms and expands the copper hairpins and brazes the return bends on its own lines, so the geometry printed on the specification sheet is the geometry that ships.
- Evaporator rows, every model
- 2
- Evaporator tube, inner-grooved
- 7 mm
- Condenser tube, inner-grooved
- 5 mm
- Refrigerant the coils are built for
- R32
Coils we build
04 coils
- Indoor evaporator coil
- Two-row slit-fin coil on 7 mm inner-grooved tube at 21 × 12.7 mm pitch, in 620, 725 and 887 mm lengths to match the 830, 930 and 1100 mm chassis.
- Learn more
- One-row condenser coil
- 5 mm inner-grooved tube, 670 × 11.52 × 429 mm or 805 × 11.52 × 507 mm, for the 3-star outdoor cabinets.
- Two-row condenser coil
- 805 × 23.04 × 546 mm in the 900 × 360 × 600 mm cabinet — the extra surface behind the 5-star rating.
- Learn more
- Window coils
- The 887 mm evaporator and a 718 × 17.46 × 480 mm condenser, both built into the single 660 mm window cabinet.
- Learn more
Coil geometry
Fin, tube, rows —
as printed on the sheet.
The evaporator and condenser geometry behind every model, beside the coil itself.
2-row slit-fin · 7 mm tubeFin-and-tube coil · 2-row slit-fin, 7 mm tube
| Parameter | Value |
|---|---|
| Evaporator — every model | |
| Number of rows | 2 |
| Tube pitch (a) × row | 21x12.7mm |
| Fin type | Slit |
| Tube outside dia. | 7mm and IGTmm |
| Evaporator coil length × height, by platform | |
| 830-17" | 620x25.4x378mm |
| 930-20" · 930-22" | 725x25.4x378mm |
| 1100-22" · Window | 887x25.4x378mm |
| Condenser — every model | |
| Tube outside dia. and type | 5mm and IGT |
| Refrigerant | R32 |
| Condenser coil, rows and expansion | |
| 1-row · 12K 3★ | 670x11.52x429 · Capillarymm |
| 1-row · 17K 3★, 18K 3★ | 805x11.52x507 · Capillarymm |
| 2-row · 17K 5★, 18K 5★, 22K 3★ | 805x23.04x546 · EEV / Capillarymm |
| 1-row · 18K window, 22K window | 718x17.46x480 · Capillarymm |
Values as printed on the manufacturer specification sheet. See every model.
On the line
How a coil
is made here.
Process
05 steps
Fin pressing
Aluminium fin stock is pressed with the slit-fin pattern and collar that set the tube pitch and the air-side surface.Hairpin bending and lacing
Inner-grooved copper tube is cut and bent into hairpins, then laced through the fin pack in the row and pitch printed on the sheet.Tube expansion
Hairpins are mechanically expanded so the tube wall locks against the fin collar — the contact that carries the heat.Return-bend brazing
Return bends and the header manifold are brazed to close the circuit, with the inlet and outlet line-set formed to the unit.Leak test and dry
Every circuit is pressure-tested and dried before it goes to assembly and R32 charging.
Buyer questions
Before you
write the RFQ.
Frequently asked
04 questions
What coil geometry do Ezentech units use?
Evaporators are two-row slit-fin coils on 7 mm inner-grooved tube at 21 × 12.7 mm pitch. Condensers use 5 mm inner-grooved tube in one row (3-star) or two rows (5-star split models).
Can Ezentech supply coils as a component, without the unit?
Coil manufacturing is an in-house capability that primarily feeds Ezentech's own units. Component supply for a partner's programme is discussed case by case in the RFQ.
Why does the 5-star model have a different condenser?
On the sheet, the 5-star split models carry a two-row 805 × 23.04 × 546 mm condenser coil against one row on the 3-star models — more heat-rejection surface at part load, paired with an electronic expansion valve.
Are the coils built for R32?
Yes. Every model on the sheet runs R32, and the coil circuits, expansion devices and line sets are specified for it.
Planning a programme that needs heat exchanger coils? Send the requirement — capacity, volume, chassis — and we will come back with a production plan.
Start the conversation
Let’s build
your next range.
From spec to shipped — send us your requirement and get a structured, engineering-backed quote.
OEM / ODM · Private label · Contract manufacturing