Water heater manufacturers in Asia range from global appliance groups in China and Japan to specialist electric water heater factories in India, Malaysia and Vietnam. This guide profiles 10 of them, ranked by a public set of criteria built for importers and distributors, with a comparison table and a supplier checklist. SONHA Water Heater is our brand; we explain below how we ranked every company, including ourselves.
| At a glance The 10 water heater manufacturers in Asia profiled here are SONHA Water Heater (Vietnam), Midea Group and Haier (China), Havells (India), Rheem (part of Japan’s Paloma Group), Joven and Alpha Electric (Malaysia), Rinnai (Japan), KD Navien (South Korea) and Vanward (China). Seven of them focus on electric water heaters, and the other three are known for gas models. Each profile uses the same fields so you can compare them quickly; the ranking criteria follow the list. |
1. Top 10 Water Heater Manufacturers in Asia
The 10 profiles below cover electric water heater specialists and gas-focused groups from Asia. Each profile follows the same fields, including headquarters, founding year, water heater range and the buyers it suits best.
1.1. SONHA Water Heater (Vietnam)
SONHA Water Heater is our electric water heater business within SONHA Group, which started in 1998 with stainless steel water tanks. We have made water heaters since 2016, and we now build storage, instant and heat pump models for export buyers.
- Headquarters: Vietnam
- Founded: 1998 (water heaters since 2016)
- Water heater range: storage, instant and heat pump
- Key specifications:
- Manufacturing experience: 10+ years
- Production area in Vietnam: 4,880 m²
- Export markets: 5+ (Asia, North America, Africa and Australia)
- Annual capacity: 1M+ units a year
- Standards & certifications: CB, CE and international standards
- Suited to: importers and distributors that need market-specific configurations and flexible order sizes
Additionally, SONHA Water Heater factory is certified to ISO 9001:2015 by TÜV NORD. Every unit passes an electrical safety test at outgoing quality control before packing. Our product lines include:
- Storage water heaters: Daria, Lumix, Daria Digital, SONHA series and many more, 15–30 Liter enamel-coated tank, using 200W to 2500W heating element (SUS316L, INCOLOY 840, INCOLOY 800, COPPER), ELCB and PU foam insulation.
- Large capacity: Daria Max 50, 80 and 100 L, available in 220–230 V or 110–127 V, rated to 0.75 MPa.
- Instant water heaters: 4,500 W, with or without a booster pump, ELCB and IPX4 protection.
- Heat pump water heaters: All-in-one 200–270 L heat pump systems using R290 refrigerant, plus 160–300 L split systems.
We also support OEM water heater manufacturing with private-label packaging and labels, trial orders and small or mid-size orders. Standard lead time is 30–45 days, or 45–60 days for OEM and ODM projects, on FOB, CIF or CFR terms.
1.2. Midea Group (China)
Midea Group is a Chinese electrical appliance manufacturer founded in 1968, with a product range that includes water appliances alongside air conditioning and kitchen equipment. An electric water heater manufacturer of this scale suits buyers who want one supplier across several appliance categories.
- Headquarters: Beijiao, Shunde District, Foshan, Guangdong, China
- Founded: 1968; listed on the Shenzhen Stock Exchange since 2013
- Water heater range: electric water heaters within a broad home appliance portfolio
- Suited to: high-volume buyers sourcing several appliance categories from one group
- Consider: confirm minimum order quantities and OEM terms early, since large groups set their own order thresholds
1.3. Haier (China)
Haier is a Chinese home appliance group founded in 1984 in Qingdao, with water heaters as one category in a wide appliance range. Distributors that already carry refrigerators or washing machines can add storage water heaters from the same source.
- Headquarters: Qingdao, Shandong, China
- Founded: 1984
- Water heater range: electric storage water heaters within a full home appliance portfolio
- Suited to: distributors that want to bundle water heaters with other household appliances
- Consider: water heaters are one of many categories, so check how much support the water heater line receives in your region
1.4. Havells (India) – Electric Water Heaters for South Asian Markets
Havells is an Indian electrical equipment company founded in 1958 and headquartered in Noida, making water heaters alongside fans, lighting and cables. The company serves a large home market with a wide distribution network.
- Headquarters: Noida, Uttar Pradesh, India
- Founded: 1958
- Water heater range: electric water heaters within a wider electrical equipment range
- Suited to: buyers serving South Asian markets or looking for a broad electrical product range
- Consider: the business is centred on the Indian market, so check export configurations for your country
1.5. Rheem Asia
Rheem is a water heating and HVAC manufacturer founded in 1925 and headquartered in Atlanta, United States. The company has operated as an independent subsidiary of Paloma Industries, the Japanese group based in Nagoya, since 1988, and its markets include Singapore.
- Headquarters: Atlanta, United States; parent company Paloma Industries, Nagoya, Japan
- Founded: 1925; part of Paloma since 1988
- Water heater range: residential and commercial water heaters and boilers, sold under several brands
- Suited to: distributors that want an international water heater brand with a presence in Asian markets such as Singapore
- Consider: Rheem runs many brands and regional units, so confirm which entity and plant will supply your market and whether private-label OEM is available
1.6. Joven (Malaysia)
Joven is a Malaysian brand that has made water heaters in Malaysia since 1983, with ISO 9001 certification and a focus on instant and storage models. Its range is designed for tropical homes where instant shower heaters are common.
- Headquarters: Malaysia
- Founded: 1983
- Water heater range: instant and storage water heaters
- Suited to: buyers in warm climates where instant water heaters are common in homes
- Consider: a specialist range with fewer large-capacity and heat pump options than diversified groups
1.7. Alpha Electric (Malaysia)
Alpha Electric is a Malaysian water heater manufacturer based in Shah Alam, Selangor, whose instantaneous water heater won a Product Excellence Award at Malaysia’s Industry Excellence Award 2001. The company focuses on instant water heaters for bathrooms and showers.
- Headquarters: Shah Alam, Selangor, Malaysia
- Recognition: Product Excellence Award, Industry Excellence Award 2001 (Malaysia)
- Water heater range: instant water heaters for bathrooms and showers
- Suited to: buyers focused on instant shower heaters for Southeast Asian markets
- Consider: the range centres on bathroom water heating rather than whole-home or heat pump systems
1.8. Rinnai (Japan)
Rinnai is a Japanese gas appliance manufacturer founded in 1920 and headquartered in Nagoya, known for gas tankless water heaters. A tankless water heater manufacturer of this type suits markets where homes use natural gas or LPG.
- Headquarters: Nagoya, Japan
- Founded: 1920
- Water heater range: gas tankless water heaters and other gas appliances
- Suited to: distributors in markets with piped gas or LPG supply
- Consider: the focus is gas, so it fits fewer projects that require electric storage water heaters
1.9. KD Navien (South Korea)
KD Navien is a South Korean company founded in 1978 as KD Machinery, which began making condensing gas boilers about a decade later. Its condensing tankless water heaters are designed for high-efficiency gas heating.
- Headquarters: South Korea
- Founded: 1978
- Water heater range: condensing gas tankless water heaters and boilers
- Suited to: buyers in colder markets that use gas for space and water heating
- Consider: the range centres on gas and boilers rather than electric water heaters
1.10. Vanward (China) – Gas Water Heaters
Guangdong Vanward New Electric was founded in 1993 and is headquartered in Foshan, offering gas instant, air source and electric water heaters. The company is listed on the Shenzhen Stock Exchange.
- Headquarters: Foshan, Guangdong, China
- Founded: 1993
- Water heater range: gas instant water heaters, air source heat pumps and electric water heaters
- Suited to: buyers whose main demand is gas water heaters
- Consider: gas is the core category, so check the depth of the electric range for your market
2. Water Heater Manufacturers in Asia Compared Side by Side
Choose among these water heater manufacturers by energy type first, then by target market and OEM needs. Electric specialists suit storage and instant projects; Japanese, Korean and some Chinese makers suit gas tankless demand. Unlike consumer lists of water heater brands, the table below compares suppliers for trade buyers and uses only the facts in each profile.
| Water Heater Manufacturer | Country | Founded | Main water heater types | Suited to |
|---|---|---|---|---|
| SONHA Water Heater | Vietnam | 1998 (water heaters since 2016) | Electric storage, instant, heat pump | OEM projects, market-specific voltage and capacity |
| Midea Group | China | 1968 | Electric, within a broad appliance range | High-volume, multi-category sourcing |
| Haier | China | 1984 | Electric storage, within a full appliance range | Bundling with other household appliances |
| Havells | India | 1958 | Electric | South Asian markets |
| Rheem | United States (Paloma Group, Japan) | 1925 | Residential and commercial water heaters | An international multi-brand group |
| Joven | Malaysia | 1983 | Instant, storage | Warm-climate instant demand |
| Alpha Electric | Malaysia | Not published (award 2001) | Instant | Instant shower heaters |
| Rinnai | Japan | 1920 | Gas tankless | Piped gas or LPG markets |
| KD Navien | South Korea | 1978 | Condensing gas tankless, boilers | Colder, gas-heated markets |
| Vanward | China | 1993 | Gas instant, air source, electric | Gas-led demand |
If your buyers need electric water heaters in specific voltages, capacities and private labels, start with the electric specialists. If your market runs on gas, shortlist the gas tankless makers and compare their local service networks.
3. How We Ranked These Water Heater Manufacturers in Asia?
We ranked the Asian water heater manufacturers above on five criteria that matter to an importer or distributor: product range, export readiness, certifications, B2B flexibility and fit for small-to-mid-size distribution. The order reflects fit for those buyers, not company size or revenue. A larger group may suit a buyer whose needs differ.
- Product range: whether the company makes instant, storage and heat pump water heaters, or focuses on one energy type such as gas.
- Export readiness: whether products can be configured for the destination market, including voltage, plug type and capacity.
- Certifications: evidence of safety testing to the IEC 60335 series. IEC 60335-2-21 covers storage water heaters and IEC 60335-2-40 covers heat pumps, supported by CB or CE certificates.
- B2B flexibility: OEM and ODM options, private labels, trial orders and acceptance of small or mid-size orders.
- Fit for importers and distributors: how directly the company sells to overseas trade buyers rather than mainly to its home retail market.
Facts about other companies come from neutral sources such as Wikipedia, trade promotion agencies and industry publications, linked in each profile. Facts about SONHA Water Heater come from our own published specifications. SONHA Water Heater is our brand, so we list a point to consider for every company, including our own.
4. Why Importers Source from Water Heater Manufacturers in Asia?
Importers source from water heater manufacturers in Asia because the region combines a large home market with full supply chains for electric, gas and heat pump models. The Asia Pacific market is estimated at USD 11 billion in 2025 and expected to grow about 6% a year to USD 18.6 billion by 2034. Japan holds a substantial share of the regional market because tankless heaters are popular there.
Each water heater manufacturing hub in Asia has a different profile:
- Vietnam: water heater manufacturers in Vietnam offer growing OEM capacity for electric water heaters, used by buyers who want to diversify supply beyond a single country.
- China: water heater manufacturers in China include large-scale appliance groups with complete component supply chains for electric, gas and heat pump water heaters.
- Japan and South Korea: gas tankless and condensing technology, built for high-efficiency home heating.
- India: electrical equipment companies that serve a large domestic market with storage and solar water heaters.
- Malaysia: specialist makers of instant and storage water heaters for tropical climates in Southeast Asia.
A water heater supplier from any of these hubs can serve export markets. The right choice depends on your energy type, voltage, certification needs and order size, which the next sections compare.
5. How to Choose a Water Heater Manufacturer in Asia
To choose a water heater manufacturer in Asia, check five things in order: product range and market configuration, certifications, factory capability and quality control, OEM flexibility and order size, and lead time with landed cost. A supplier that passes all five can ship products that clear customs and sell without rework.
5.1. Product Range and Market Configuration
A manufacturer’s range should match how your customers heat water:
- An instant water heater heats water on demand for one outlet.
- A storage water heater keeps a tank of hot water for several outlets.
- A heat pump water heater moves heat from the air and uses less electricity; ask any heat pump water heater manufacturer which refrigerant and climate range its units are designed for.
The product also has to fit your grid and sockets. There are about 15 plug types in use worldwide, labelled Type A to Type O.
5.2. Certifications and Compliance
Safety certification decides whether a water heater can enter your market. Storage models are tested to IEC 60335-1 with IEC 60335-2-21; instant models use IEC 60335-2-35; heat pump water heaters fall under IEC 60335-2-40.
- CB Scheme: a test report other countries can accept, which reduces repeat testing.
- CE marking: required for many markets that follow European rules.
- National certificates: some destination countries add their own approval or inspection.
- HS code: electric storage water heaters are classified under 8516.10, which affects import duty.
Request scanned certificates with the issuing body’s name, and check that the model numbers match your order.
5.3. Factory Capability and Quality Control
Factory capability shows whether an electric water heater factory can deliver consistent quality at your volume. Ask for annual capacity, ISO 9001 certification, and the quality control applied to each batch, such as a 100% electrical safety test before packing.
Tank build matters for warranty costs. Check the inner tank coating, magnesium anode rod and PU foam insulation. Tank water heaters typically last 8–12 years, so tank quality drives long-term claims. Arrange a factory audit or third-party inspection before your initial shipment.
5.4. OEM/ODM Flexibility and Minimum Order Quantity
OEM flexibility lets a water heater distributor build its own brand instead of reselling a factory label. Ask whether the supplier designs private-label packaging and rating labels, adjusts specifications, and accepts trial orders.
Minimum order quantity varies by manufacturer and product. Large groups often set higher thresholds, while specialist OEM water heater manufacturers may accept small or mid-size first orders. Confirm the quantity per model and colour, not just per container.
5.5. Lead Time, Incoterms and Landed Cost
Landed cost is the unit price plus sea freight, import duty, certification and inland logistics. Compare suppliers on landed cost, not ex-works price.
- Lead time: ask for standard and OEM lead times separately, and plan orders before the winter selling season.
- Incoterms: FOB, CIF and CFR shift freight and insurance responsibility between you and the supplier.
- Payment terms: T/T deposits and letters of credit are common for first orders.
- Supply diversification: sourcing from more than one Asian country reduces exposure to tariff changes on a single origin.
No single supplier fits every buyer among the water heater manufacturers in Asia. Start with your energy type and market configuration, then compare certifications and OEM flexibility, and judge offers on landed cost.
If you need electric storage, instant or heat pump water heaters configured for your voltage and brand, SONHA Water Heater can quote a trial order. View our electric water heater range or contact our export team.
6. Frequently Asked Questions
6.1. How do I verify a water heater manufacturer in Asia before ordering?
Verify a water heater manufacturer in Asia in four steps: check that product specifications meet your needs, confirm market-specific requirements such as plug type and power, verify international certifications such as CB and CE under IEC 60335 safety standards along with national requirements (factory audits, energy labels, marking, etc,..), and ensure certificate model numbers match the products quoted.
6.2. What certifications should an Asian water heater supplier have?
An Asian water heater supplier should have CB certification under IEC 60335 safety standards, which is widely accepted and supports applications for national certifications. For the European market, CE certification and CE marking are required.
6.3. Can water heater manufacturers in Asia supply 110V models?
Yes. Export-focused manufacturers build 110V models for markets such as Mexico, where homes typically use 110–117 V and Type A plugs. Confirm voltage, plug and capacity on the rating label before ordering. Our Daria Max storage range, for example, is available in 110–127 V in 50, 80 and 100 L sizes.
6.4. Are water heaters made in Vietnam good quality?
Water heaters made in Vietnam can meet export requirements when the factory holds IEC-based test reports, CB or CE certificates and ISO 9001 quality management. Quality depends on the individual factory, so request certificates, samples and an inspection. Our own Vietnam factory, for example, tests every unit electrically before packing.
6.5. What lead time should I expect when sourcing water heaters from Asia?
Lead time depends on the product and on whether the order is standard or OEM, so ask every supplier for both figures. At SONHA Water Heater, standard orders take 30–45 days and OEM or ODM projects take 45–60 days, shipped on FOB, CIF or CFR terms. Plan orders before the winter selling season.
6.6. Does SONHA Water Heater offer OEM water heaters?
Yes. We offer OEM and ODM water heaters with private-label packaging and rating labels, trial orders and small or mid-size orders. Each project follows six steps: consultation, OEM engineering and sample, order confirmation, manufacturing, final inspection, and global delivery with after-sales support.
Contact SONHA Water Heater’s export team at:
- Email: export@sonha.com.vn
- WhatsApp: +84 983 604 297
