What services do you provide?

We provide detailed explanations for factories, wholesalers, purchasers, dealers, consumers, and engineering/design firms. For service dissatisfaction, contact us via email or phone.

What is the warranty policy?

We offer a 1-year warranty from shipment or 18 months from production, whichever comes first, covering free parts for manufacturing defects.

Do you support OEM and ODM?

Yes, we support OEM and ODM with customization for logo, panel design, packaging, and manual localization.

20kw Combi Gas Boiler for Instant Hot Water Supply

Name: 20kw Combi Gas Boiler for Instant Hot Water Supply
Brand: Zhongshan Doublemax Electrical Appliances Co., Ltd.
SKU: 2255756145

Guangdong, ChinaZhongshan Doublemax Electrical Appliances Co., Ltd.

US$325.00

50-99 Pieces

US$250.00

100-999 Pieces

US$195.00

1,000+ Pieces

Product specifications

760X480X320

Sample price:US$500.00/piece.Request sample

Product profile

Customization

Available

After-sales Service

1% Spare Part

Warranty

Model NO.

HBG-K15B

Brand

Doublemax

Installation

Wall-Mounted

Power (W)

32kw

Exhaust Way

Forced Exhaust Flue

Gas Heater Type

Gas Heating

Ignition

Electronic Pulse Ignited

Heating Area

up to 249 FT²

Material

Metal

Overheat Protection

Yes

Power Source

Gas

Use

Bathroom, Bedroom, Living Room

Energy Efficiency Rating

Class a

Heat Efficiency

Over 90%

Display Type

LED

APP-Controlled

Voltage (V)

110-220V

Transport Package

760X480X320 84

Specification

660X410X253

Trademark

oublemax

Origin

China

HS Code

841810

Production Capacity

200000/Year

Key features

Dual Function Heating: Provides both central heating and instant hot water supply in one compact unit.

High Energy Efficiency: Achieves over 90% heat efficiency with Class A energy rating for cost savings.

Flexible Customization: Offers customizable panel, logo, color, and language options for branding.

Multiple Safety Protections: Features overheating, anti-dry burn, flame failure, and overpressure protection.

Compact Wall-Mounted Design: Space-saving installation suitable for apartments, villas, and small homes.

Constant Temperature Control: Maintains stable water temperature with intelligent LED digital display.

Quiet Operation: Operates at noise levels below 45 dB for a peaceful living environment.

Comprehensive Warranty: Includes 1-year warranty from shipment or 18 months from production with free parts.

Company profile

Zhongshan Doublemax Electrical Appliances Co., Ltd.

Guangdong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service AvailableExport Year: 2009-05-01 CertifiedNearest Port: Shenzhen Port, Guangzhou Port, Zhongshan PortAverage Response Time: ≤3.22h CertifiedTerms of Payment: LC, T/T, D/P, etc.

AI-Powered supplier vetting

SummaryZhongshan Doublemax Electrical Appliances Co., Ltd. is a China-based limited company established in 2017, operating from Guangdong with 44 employees and a 6,000 m² manufacturing plant. It produces a broad range of kitchen and water-heating appliances, operates more than 10 production lines, and exports to multiple regions. The supplier reports ISO9001:2008 quality-system certification, TUV Rheinland site-audit passage, and various product certifications, while its management-system certification field is recorded as NIL. Innovation evidence includes a stated 36-engineer R&D team, experienced personnel, and appearance-design patents, although another record lists six total R&D engineers. Export activity reportedly began in 2009, but the available transaction evidence includes only one buyer-linked transaction in 2025. After-sales service, financial credibility, and customization capability cannot be conclusively assessed from the provided information.

Supplier typeThe supplier is identified as a combined business and limited company based in China, specializing in electrical and consumer electronics. Its stated products include range hoods, gas and electric water heaters, stoves, ovens, induction cookers, and related parts.

CertificationsThe supplier reports passing TUV Rheinland site certification audits and holding ISO9001:2008 quality-system certification; it also states that more than 50% of products passed CE, CB, COC, SASO, EMC, and KUCAS certification. However, supplier management-system certification is separately recorded as NIL, so the evidence supports product and quality certifications but not comprehensive management certification.

R&D capabilityThe supplier states that its R&D team includes 36 engineers with more than 10 years of high-end kitchen-appliance experience and that it holds multiple appearance-design patents. A separate record lists six total R&D engineers, creating an internal inconsistency, but the slices still provide explicit evidence of dedicated R&D and patent activity.

Production capacityThe supplier reports a 6,000 m² manufacturing plant, 44 employees, more than 10 production lines, and a broad appliance portfolio. Its stated manufacturing scope and infrastructure indicate established production capability, although actual capacity by product, utilization, and delivery performance are not provided.