Rasonic RWH-CT21L Black 21L Rapid Heating Electric Water Heater-Central Type
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The Rasonic RWH-CT21L Rapid Heating Electric Water Heater is a high-performance central type water heater designed for efficient hot water supply. Featuring a powerful 3,000W heating element and a 19-liter stainless steel water tank, this unvented unit delivers rapid heating to 75℃ with a preheat time of approximately 5 minutes to reach 40℃. Its slim black tempered glass design offers a modern aesthetic while optimizing space. Built with durability and safety in mind, it includes multiple protection mechanisms and comes with a 10-year warranty on the stainless steel water tank.
Key Features
- Rapid Heating Technology: Equipped with new rapid heating technology to significantly increase heating speed and efficiency, shortening preheat waiting times.
- 19L Capacity: Provides ample hot water for showering, ensuring a stable and comfortable supply.
- Slim & Stylish Design: Its sleek, space-saving profile with a sophisticated black tempered glass cover integrates seamlessly into modern interiors.
- Intuitive Control: Features an LED temperature display for clear readings and a knob control for precise temperature adjustment.
- Water Efficiency: A built-in flow-restrictor device maintains water flow intensity while reducing overall water consumption.
- Stainless Steel Water Tank: Ensures long-term durability and resistance to corrosion.
- Special Air Pressure Shower Head: Designed for safe, reliable, and durable performance.
Technical Specifications
- Model: RWH-CT21L
- Type: Rapid Heating Unvented Electric Water Heater - Central Type
- Color: Black Tempered Glass
- Rated Power: 3,000W
- Rated Voltage: 220V
- Frequency: 50Hz
- Water Tank Capacity: 19 Litres (Approx.)
- Maximum Water Temperature: 75℃
- Preheat Time: Approx. 5 minutes (to reach 40℃)
- Product Dimensions (W x D x H): 420 x 170 x 655 mm
- Net Weight (Approx.): 17.2 kg
- Full Tank Weight (Approx.): 36.2 kg
- Maximum Water Supply Pressure: 600kPa (6 bar)
- Pipe Connection: 1/2"
- Output Pipe Connection: x 2 (Cold & Hot water supply)
- Waterproof Standard: IPX1
Safety & Durability
- Automatic Temperature Control: Maintains desired water temperature for consistent comfort.
- Pressure & Temperature Relief Valve: Ensures safe operation by releasing excess pressure or temperature (99℃/1,000kPa).
- Overheat Protection: Automatically shuts off if water temperature exceeds 110℃, preventing potential hazards.
- Anti-vacuum Valve Device: Effectively prevents hot water in the tank from siphoning back under abnormal conditions, protecting the water tank and heating element.
- Product Warranty: 1-year warranty.
- Water Tank Warranty: 10-year warranty on the stainless steel water tank.
Specifications are subject to change without prior notice.
The product information above is for reference only; everything is subject to the brand's official website.
Rasonic RWH-CT21L Black 21L Rapid Heating Electric Water Heater-Central Type Review
Installation
Electric Water Heaters
Standard Installation
| Item | Charge |
|---|---|
| Site inspection (non-refundable) | Installed by agent; charges apply separately |
| Instant type (three-phase or single-phase) | Installed by agent; charges apply separately |
| Shower type | Installed by agent; charges apply separately |
| Pressure type, 6.5 gallons or below | Installed by agent; charges apply separately |
| Pressure type, 10 gallons or above | Installed by agent; charges apply separately |
| Horizontal type | Installed by agent; charges apply separately |
| Remove and dispose of old unit | Installed by agent; charges apply separately |
Standard Installation Scope
| Type | Included |
|---|---|
| Instant type | Includes 3 ft exposed wiring Includes 4 ft plastic-coated hot/cold copper pipe |
| Shower type | Includes 10 ft exposed electrical cable Includes 4 ft plastic-coated hot/cold copper pipe and 2 fittings |
| Pressure type | Includes 10 ft exposed electrical cable Includes 3 ft plastic-coated hot/cold water pipe and 7 fittings |
Electric Water Heater Additional Installation Charges (For Reference Only)
| Item | Charge |
|---|---|
| Plastic-coated hot/cold copper pipe (per ft) | HK$30 |
| White discharge-valve copper pipe (within 8 ft) | HK$100 |
| Copper pipe fitting (each) | HK$30 |
| Pressure reducing valve | HK$400 |
| Add tee water connection if no water inlet is available | HK$200 |
| Install one electrical point (includes 15 ft cable and circuit breaker) | HK$800 |
| Install branched electrical point (includes 10 ft cable) | HK$250 |
| Extend power cable (per ft) | HK$20 |
| Extend power cable (three-phase ×4, per ft) | HK$80 |
| Staircase handling (per floor per item) | HK$30 |
| Tung Chung and Ma Wan installation surcharge (per order) | HK$100 |
| Discovery Bay installation surcharge (per order): 3 units or fewer | HK$300 |
| Discovery Bay installation surcharge (per order): more than 3 units | HK$600 |
Delivery Charges
Basic Delivery
| Item | Charge |
|---|---|
| Delivery (per item) | HK$100 |
| Tung Chung, Ma Wan and Discovery Bay surcharge (per delivery) | HK$100 |
| Carrying distance to delivery location exceeds 100 m | Additional charges apply |
Note: Charges may differ if delivery is arranged by an agent. Please contact us for details.
Staircase Handling
Except for village houses, where 14 steps count as one floor, other buildings count 10 steps as one floor. The first 5 steps are free of charge.
| Item | Charge |
|---|---|
| General appliances | HK$30 / item / floor |
| Window AC, 3/4 HP to 1 HP | HK$30 / item / floor |
| Window AC, 1.5 HP to 2.5 HP | HK$50 / item / floor |
| Window AC, 3 HP or above | To be discussed |
| Split AC, refrigerator, washing machine | HK$50 / item / floor |
| Built-in oven, steam oven, chimney hood, built-in / freestanding dishwasher | HK$50 / item / floor |
Note: Charges may differ if delivery is arranged by an agent. Please contact us for details.
General Notes
- The above installation fees are quoted for work handled by BBE’s appointed contractor / appointed registered electrical contractor.
- Charges may differ if delivery/installation is handled by other agents or contractors. Please contact us for details.
- A compliant power supply must be provided by the customer near the appliance.
- Items not listed in this fee schedule must be discussed with the technician.
- The installation location must be confirmed by the customer. Relocation or reinstallation after installation at the customer’s request will be quoted separately.
- Installation schedule: Hong Kong Island (Tue, Thu, Sat); Kowloon (Mon to Sat); New Territories (Mon to Sat).
- Delivery coverage excludes outlying islands, restricted areas and overseas locations.
- Delivery or installation is generally arranged during office hours. For non-office hours such as evenings or public holidays, please check feasibility in advance.
Why us?
Why Choose BBE?
The trusted choice for more than 300,000 households in Hong Kong. We focus on exceptional quality, professional guidance, and a more peace-of-mind shopping experience.
Multiple Large Showrooms
Experience in person · Compare on the spot
Visit our flagship showrooms in Mong Kok, Causeway Bay, and Tuen Mun. Explore more than 1,000 European, American, and Japanese kitchen appliances, and get on-site recommendations from professional advisors for selection and installation.
Real Customer Service · Dedicated Follow-up
Order confirmation · Peace of mind follow-up
Each order is handled by a dedicated team who contacts and confirms details to ensure smooth delivery and installation. You can also reach real customer service via WhatsApp anytime.
1-to-1 Expert Consultation
Instant support · Professional answers
Get real-time professional support via WhatsApp. Whether you need help comparing appliance specifications, checking dimensions, or answering installation questions, our expert team will respond promptly.
100% Official Stock
No parallel imports · Clear warranty coverage
All appliances are official products from the Hong Kong总代理. Enjoy at least one-year manufacturer warranty and a 7-day replacement guarantee for faulty items, for added peace of mind after purchase.
Award-Winning
Recognized by brands · Valued service
Our service quality is recognized by the industry and top brands. We have received the TGC Sales Gold Award from the Gas Company and Daikin’s Diamond-level “Daikin Star” honor, along with multiple partner awards and distributor recognitions.
Safe Shopping · Professional Installation
One-stop service · More peace of mind
Our website uses SSL encryption, supports multiple electronic payment methods, and provides a one-stop professional delivery and installation service, making the entire shopping process more convenient and reassuring.
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