What products does HK Dongda Supply Chain Limited supply?

We supply water cooled ice bath chillers from 0.3HP to 1.5HP, all-in-one cold plunge units in stainless steel and acrylic, far infrared sauna blankets, portable sauna tents and steam bath boxes, and infrared heating mats including red light and PEMF models.

Do you offer OEM, ODM and private-label services?

Yes. Our design team supports logo application, pattern and colour design, retail packaging and structural customization, such as our 0.5HP customized chiller with 1000 L/H flow and a 4-point outlet design.

Which certifications are available for your products?

We hold certifications and audits from SGS, CTTC, BSCI, ISO, OEKO-TEX and GRS. Applicable models such as the FUL-B stainless steel cold bath tub carry CE, FCC and RoHS certification. Documents can be requested per SKU.

Are your water chillers compatible with US and European power supplies?

Our 1.5HP ice bath water chiller is available in 110V and 220-240V versions to match North American, European and Asian power grids. Please confirm voltage and plug standard when ordering.

What refrigerants do your chillers use?

Our chillers use eco-friendly R290 or R32 refrigerant, aligned with European and US environmental policies for low global-warming-potential cooling.

How do I choose the right chiller horsepower for a cold plunge tub?

Chiller sizing depends on tub water volume, ambient installation temperature, target water temperature, usage frequency, local voltage and tub insulation. Home tubs are usually served by 0.3HP to 0.5HP units, while multi-user commercial recovery centres typically need 1.5HP. Share these data points and our engineers will recommend a matched model.

How can I get a catalog or product samples?

Use our Request a Catalog page or contact our export team by email or WhatsApp. We aim to reply to every B2B enquiry within 24 hours.

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White Paper Analysis

The Global Shift: Clean Water Technology in Cryotherapy Systems

Analyzing water microbiology, dual-path sanitation standards, and thermodynamic efficiency parameters governing modern commercial and residential ice bath chillers.

Continuous Ultra-Violet Water Purification

Traditional cold plunge tubs rely on manual water replenishment or heavy chemical dosers that cause respiratory discomfort and skin irritation. Our high-output C-band ultraviolet (UV-C at 254 nm) chambers disrupt micro-organism DNA, neutralizing 99.9% of bath bacteria, algae, and bio-film formations dynamically during each cycle without destabilizing water chemistry.

Active Mechanical & Ozone Dual Scrubbing

By pairing high-density 20-micron pleated sediment filters with integrated corona-discharge ozone generators, suspended organic matter and skin oils are systematically oxidized before reaching the titanium plate heat exchanger. This clean-water protocol ensures the chiller maintains peak thermal transfer rates over extended operating hours.

Thermodynamic Pulldown & Heat Exchange

Engineered with oversized pure titanium evaporators, Dongda chillers deliver continuous corrosion resistance against both fresh and saline plunge solutions. The system maintains stable cooling curves down to 2°C (35.6°F) even under high ambient gym temperatures, mitigating compressor wear via variable-speed thermodynamic cycling.

Manufacturing Efficiency

China Factory Scalability & Engineering Superiority

Combining the dense supply ecosystem of the Greater Bay Area with strict European and American safety compliance frameworks.

Integrated Industrial Clusters

Direct sourcing of high-purity refrigeration grade copper, titanium coils, rotational-molded polymers, and industrial PCBA boards within a 50km radius eliminates logistic delays and accelerates custom prototyping cycles.

Multi-Regulatory Conformity

Standard builds are tailored to pass CE, FCC, RoHS, and UL electrical safety mandates with certified leakage protection, emergency shut-off valves, and food-grade internal water conduit systems.

Eco Refrigerants (R290 / R32)

Proactive compliance with the European F-Gas Regulation and US EPA AIM Act mandates. Our engineering integrates ultra-low GWP R290 (propane) and efficient R32 closed systems for zero ozone depletion.

Stringent End-of-Line QA

Every single chiller undergoes continuous 48-hour pressure testing, thermal pulldown stress trials, and water tightness verification prior to export palletization and moisture-barrier crating.

200+

Certified Technicians & Line Operators

600K+

Cumulative Monthly Component Capacity

2°C - 45°C

Bi-Directional Precision Temperature Control

100%

Hydrostatic & Electrical Safety Pre-Tested

Engineering Matrix

Industrial Chiller Configurations & Thermal Capacities

B2B buyer benchmarking for residential, commercial recovery center, and varsity sports installations.

Chiller Specification	0.3 HP Compact Unit	0.5 HP High-Flow Model	1.5 HP Commercial System	FUL-B Integrated Plunge Tub
Target Water Volume	Up to 300 Liters (80 Gallons)	300 - 550 Liters (145 Gallons)	500 - 1,200 Liters (315 Gallons)	Integrated Ergonomic Tub Assembly
Refrigerant Standard	Eco-Friendly R290 (GWP < 3)	Eco-Friendly R290 (GWP < 3)	Next-Gen R32 (Zero ODP)	R290 / R32 Options
Sanitization Architecture	Cartridge + Inline Ozone Option	Integrated High-Flux UV Chamber	Industrial Ozone + UV Dual Array	Self-Contained Dynamic Circulation
Circulation Flow Rate	600 - 800 L/H Internal Pump	1,000 L/H High-Volume Pump	1,800 - 2,500 L/H Self-Priming	Calibrated Flow Vectoring
Grid Voltage Compatibility	110V 60Hz / 220-240V 50Hz	110V 60Hz / 220-240V 50Hz	Universal Dual Voltage Switchable	Global Multi-Territory Hardwiring
Primary Market Application	Boutique Home Inflatable Plunges	High-End Residential & Spas	High-Traffic Gyms & Athletic Clubs	Turnkey Commercial Recovery Studios

Application Scenarios

Commercial Deployment Scenarios Across Global Markets

From Olympic-tier training centers to private wellness suites, discover how enterprise buyers optimize their facilities with high-performance water cooling loops.

High-Density Urban Wellness Studios

Boutique contrast therapy centers across North America and Western Europe demand whisper-quiet decibel ratings (<52 dB) and minimal floor footprint. Our all-in-one chillers combine space-saving horizontal airflow venting with smart app-controlled heating and cooling transitions.

Professional Athletics & Performance Clubs

Heavy usage patterns require rapid pulldown recovery times between athlete immersions. Dongda's 1.5HP systems prevent thermal rebound by circulating massive water volumes over high-efficiency titanium heat exchangers, guaranteeing constant 3°C water stability.

E-Commerce & Private Label Scalability

Direct-to-consumer fitness brands benefit from our fully customized unboxing packages: customized CNC aluminum fascia plates, brand-colored powder-coated chassis, intuitive plug-and-play quick-connect hoses, and localized region-specific manuals.

Buyer Knowledge Base

Frequently Asked Questions & Technical Procurement Guide

Expert answers addressing thermodynamic performance, sanitization protocols, power supply variants, and container logistics.

How does continuous UV sterilization differ from conventional chemical filtration?

UV-C sanitization subjects circulating water to short-wavelength ultraviolet radiation at 254 nm. This instantaneously alters microbial cellular structure without creating chemical byproducts, harsh chlorine fumes, or causing skin dryness during high-frequency cold immersion therapy.

Why are titanium heat exchangers critical for cold plunge chillers?

Plunge water frequently accumulates body oils, salts, dissolved minerals, and low-level disinfectants. Stainless steel and copper evaporators can degrade, causing pinhole freon leaks. Pure titanium provides absolute corrosion immunity, guaranteeing sustained multi-year cooling efficiency.

Can Dongda chillers accommodate varying international power standards?

Yes. Our product lines feature switchable or dedicated dual-frequency compressors (110V/60Hz for North American NEMA sockets and 220-240V/50Hz for European, Australian, and UK configurations) with integrated industrial GFCI leakage surge protection.

What is the typical thermal pulldown duration from 25°C to 3°C?

Pulldown speed is governed by tub insulation, ambient conditions, and water capacity. On a standard insulated 350-liter cold plunge paired with our 0.8HP to 1.5HP chiller, water cools from ambient room temperature to 3°C in approximately 3 to 4.5 hours.

What customized OEM/ODM options are available for new brands?

We provide comprehensive private label engineering: custom mold creation for outer casing shells, tailored Tuya/Smart Life mobile app firmware, laser cut branding, quick-disconnect hose diameters, and multi-language retail packaging.

How does Dongda handle sea freight protection and shipping drop tests?

All chiller export orders are packed in heavy-duty honeycombed corrugated cartons or reinforced plywood crates with custom form-fitting high-density EPE foam cradles, exceeding ISTA-1A drop and vibration resistance benchmarks.

Featured Catalog Tier 2