Your Custom Coil - From Drawing or Sample to Validated Production

Upload your drawing, old sample photo or parameter sheet. Domi Refrigeration can review custom condenser coils, evaporator coils, fin-tube coils, microchannel heat exchangers and non-standard thermal components for refrigeration, HVAC, heat pump, industrial cooling and liquid cooling projects.

For OEM buyers, Domi can review custom coil design requirements and respond as a custom coil manufacturer before quotation and first-sample approval.

CONVERSION PATH

Start the Custom Review with What You Have

5-Step Workflow

From requirement review to sample validation and bulk production.

Upload Any Starting Point

Drawings, sample photos, old coils, CAD files or parameter sheets.

No MOQ for First Sample

Start with one sample for evaluation before bulk production.

24-Hour Technical Response

Engineering review response for qualified custom projects.

NON-STANDARD BUYER PAIN POINTS

Standard Coils Do Not Always Fit Custom Equipment

Many buyers come to Domi because standard coils cannot match their equipment structure, performance target, replacement dimensions or installation limits. This page is designed for non-standard projects where drawings, samples, photos or incomplete parameters must be turned into a manufacturable heat exchanger solution.

I only have an old sample.

Send old coil photos, dimensions and connection positions. Domi can review replacement feasibility.

My equipment space is limited.

Custom tube routing, fin size, coil dimensions and connection direction can be reviewed according to the installation space.

My project has special materials.

Copper, aluminum, stainless steel, coated structures and hybrid materials can be discussed based on corrosion, weight, cost and heat transfer requirements.

I need a sample before committing to bulk order.

Sample development can help verify dimensions, fit-up, appearance and project-specific performance before production.

CUSTOM DEVELOPMENT TIMELINE

5-Step Custom Coil Development Timeline

The workflow below is structured for buyer clarity. Actual timing depends on product complexity, material availability, tooling requirement, testing scope and client approval speed.

STEP 1

Upload Drawing, Sample or Parameter Sheet

Timeline: Day 0

Send 2D drawings, 3D files, old coil photos, sample dimensions, working medium, pressure, capacity target or installation space.

STEP 2

Engineering Review and Feasibility Check

Timeline: Within 24 hours

Domi reviews structure, material, tube routing, fin size, connection direction, refrigerant or fluid, pressure condition and manufacturability.

STEP 3

Quotation and Technical Confirmation

Timeline: After feasibility review

Confirm coil type, dimensions, material, surface treatment, sample cost, testing requirement, packaging method and production plan.

STEP 4

First Sample Fabrication

Timeline: After quotation approval

Produce first sample for buyer approval. First sample MOQ policy must be confirmed before final publication.

STEP 5

Validation and Production Preparation

Timeline: Project-specific timeline

Review sample dimensions, fit-up, leakage, appearance, testing requirement and packaging before bulk production.

UPLOAD ENTRANCE

Upload Your Drawing, Sample Photo or Parameter Sheet

You do not need a complete drawing to start. You can send an old sample photo, rough dimensions, installation space, equipment model or parameter sheet. Domi will review the project and tell you what information is still needed.

If the customer does not meet these conditions, they can also check the styles on our brochure and choose to use our ready-made molds and styles.

Start Your Custom Coil Review

FIRST SAMPLE SUPPORT

Start with a First Sample Before Bulk Production

For custom heat exchanger and coil projects, buyers often need a sample before approving bulk production. Domi can support sample development for drawing-based, sample-based and non-standard coil projects, helping buyers confirm fit-up, dimensions, structure and packaging before mass production.

Lower Project Entry Barrier

Start with a sample review instead of committing to a large production order immediately.

Validate Fit-Up First

Check dimensions, connection position, installation space and appearance before bulk production.

Reduce Procurement Risk

Confirm the sample before arranging repeated production or long-term OEM supply.

TECHNICAL RESPONSE

24-Hour Technical Response for Custom Coil Projects

Fast engineering response is critical for non-standard projects. After receiving drawings, photos or parameters, Domi can review the basic project information and provide an initial technical response for qualified custom coil inquiries.

Structure Feasibility

Review coil shape, tube route, fin size and installation limits.

Material Suggestion

Review copper, aluminum, stainless steel, coated or hybrid material options.

Missing Data List

Tell buyers what information is still needed before quotation or sample.

Next-Step Recommendation

Recommend whether to proceed with quotation, sample, drawing confirmation or further engineering review.

CUSTOM OPTIONS

Custom Options for Non-Standard Coils and Heat Exchangers

Coil Diameter and Dimensions

Length, width, height, thickness, tube diameter and installation space.

Fin Size and Fin Pitch

Fin height, fin spacing, fin material, fin thickness and airflow resistance.

Tube Route and Circuit Design

Tube path, circuit layout, bending structure, connection direction and refrigerant path.

Material Selection

Copper, aluminum, stainless steel, steel wire, coated or hybrid structures.

Product Type

Condenser, evaporator, fin-tube coil, microchannel heat exchanger or custom coil assembly.

Working Medium

Refrigerant, water, glycol, coolant, oil or other project-specific fluids.

Surface Treatment

Anti-corrosion coating, epoxy coating, hydrophilic treatment or other project-based options.

Packaging Method

Carton, pallet, crate, protective frame or custom export packaging.

CUSTOM PRODUCT TYPES

Custom Coil and Heat Exchanger Types We Can Fabricate

Custom Condenser Coil

Custom condenser coil fabrication for equipment with limited space, coating or connection requirements.

Custom parameters: Tube diameter, fin size, coil dimensions, connection direction and coating.

Problem solved: Fits condenser performance into limited equipment space.

Custom Evaporator Coil

Evaporator coil design support for custom cabinets, air paths, defrost requirements and fit-up limits.

Custom parameters: Fin spacing, airflow direction, defrost requirement, tube path and mounting position.

Problem solved: Supports stable cooling performance and fit-up in custom cabinets.

Custom Fin-Tube Coil

Fin-tube coil development for airflow, face area, circuit and material constraints.

Custom parameters: Tube rows, fin pitch, face area, circuits, material and airflow condition.

Problem solved: Balances heat transfer, airflow and installation constraints.

Custom Microchannel Heat Exchanger

Compact heat exchanger review for lightweight thermal systems and non-standard mounting needs.

Custom parameters: Core size, port structure, channel design, mounting structure and refrigerant compatibility.

Problem solved: Supports compact thermal systems and lightweight heat exchanger design.

Custom Commercial Refrigeration Coil

Custom coil support for display cases, cabinets, beverage coolers and food-service equipment.

Custom parameters: Cabinet space, coating, airflow, replacement size and low-noise requirement.

Problem solved: Solves space, corrosion and cooling stability problems in commercial equipment.

Custom Industrial Refrigeration Coil

Large or non-standard refrigeration coil review for cold storage, chillers and process cooling.

Custom parameters: Large size, refrigerant type, pressure review, modular structure and packaging method.

Problem solved: Supports non-standard cold storage, chiller and process cooling projects.

Custom Liquid Cooling Heat Exchanger

Custom thermal component support for coolant loops and compact liquid cooling systems.

Custom parameters: Fluid path, pressure drop, coolant compatibility, material and installation space.

Problem solved: Supports targeted heat removal for compact or high-performance thermal systems.

Replacement Coil Fabrication

Replacement coil review when the old model is discontinued or standard parts are unavailable.

Custom parameters: Old sample dimensions, connection location, equipment model, refrigerant and urgency.

Problem solved: Helps replace discontinued or unavailable coils.

RFQ CHECKLIST

What to Send for a Faster Custom Coil Quote

Basic Project Information

Drawing or Sample Information

Technical Parameters

Production and Packaging

REPEATABLE PRODUCTION

From Custom Requirement to Repeatable Production

The custom fabrication workflow is designed to turn uncertain inputs into a controllable engineering, sample and production path.

Step 1: Requirement Intake

Collect drawings, samples, parameters, application information and buyer expectations.

Step 2: Engineering Review

Review structure, thermal needs, material, pressure, airflow, installation and manufacturing feasibility.

Step 3: Quotation and Technical Confirmation

Confirm scope, sample cost, material, timeline, testing requirement and packaging plan.

Step 4: Sample Fabrication

Produce first sample according to confirmed drawing, sample or parameter sheet.

Step 5: Sample Validation

Check fit-up, appearance, dimension, leakage, thermal requirement or buyer-specific approval points.

Step 6: Bulk Production Preparation

Confirm tooling, inspection checklist, packaging method, production batch and delivery schedule.

Step 7: Repeat Order Support

Maintain drawing version, production notes and packaging requirements for future repeated orders.

LOWER-RISK START

A Lower-Risk Way to Start a Custom Coil Project

Upload Before Quotation

Buyers can send drawings or photos first before committing to sample or production.

Sample Before Bulk Order

The first sample helps validate dimensions and structure before larger purchase decisions.

Engineering Feedback First

Technical review helps identify missing data and feasibility issues early.

Export Packaging Planning

Packaging is reviewed before shipment to reduce deformation, fin damage and transport risk.

FAQ

Custom Coil Fabrication FAQ

Can I request a custom coil if I only have a sample photo?

Yes. You can send old coil photos, main dimensions, connection positions and application details. Domi can review whether sample-based custom coil fabrication is feasible.

Do I need a complete drawing before contacting Domi?

No. A complete drawing is helpful, but you can also start with sample photos, rough dimensions, equipment model or a parameter sheet.

Is there a MOQ for the first sample?

No MOQ for first sample can be offered only if confirmed by the client. Final sample policy should be verified based on product structure, material and tooling requirement.

Can Domi respond within 48 hours?

Response time depends on project complexity and the completeness of drawings, samples and operating data. Complex projects may require additional information before final quotation.

What custom parameters can be changed?

Custom parameters may include coil dimensions, tube diameter, fin size, fin pitch, tube route, connection direction, material, coating, working medium and packaging method.

Can Domi fabricate replacement coils for discontinued equipment?

Yes. Buyers can provide old coil photos, dimensions, connection locations, refrigerant type and equipment model for replacement coil feasibility review.

How long does prototype-to-production take?

Prototype-to-production timing is confirmed after technical review. It depends on complexity, material availability, tooling, sample approval and testing scope.

Can custom coils be tested before bulk production?

Testing requirements can be reviewed based on product type, pressure, refrigerant, thermal performance needs and buyer specifications.

Can Domi support both small samples and bulk OEM orders?

Domi can support sample development and later bulk production review after drawings, specifications, quality requirements and packaging details are confirmed.

How do I start a custom coil fabrication project?

Upload your drawing, sample photo or parameter sheet, and include application, dimensions, material, working medium, pressure, quantity and destination country.

CUSTOM COIL RFQ

Upload Your Drawing, Sample or Parameter Sheet Today

Start with what you have: a drawing, old coil photo, rough dimension, 3D file or parameter sheet. Domi Refrigeration can review your custom heat exchanger or coil project and recommend the next step for sample development and production.

Send Your Custom Coil Requirement

Upload your drawing or sample photo and include material, dimensions, operating conditions, quantity and testing requirements.