JR GAS & WATER INSTALLER ASSESSMENT
Our Electric Instantaneous Hot Water Installer Verdict
This is the part of the product page we consider most important. It is our assessment of the product from the installer's side: construction, mounting, water connections, electrical integration and ongoing support, rather than a repeat of the specification sheet.
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JR GAS & WATER LOCAL INSTALLATION
Local Hot Water Installation Areas
View all hot water service areas🏷️ Brand – Stiebel Eltron
🔢 Model Number –
📦 Volume – 27L
📏 Width – 225mm
📐 Height – 466mm
🌍 Manufactured In – Germany
🛠️ Cylinder / Heat Exchange Material –
🛡️ Cylinder / Heat-Exchange Warranty – 7 Years
🔇 Noise Level – dBa
⚖️ Dry Weight – kg
⚡ Energy Source –
📡 WiFi Controller Built-in or Compatible –
⏲️ Built-In Timer –
💡 LED/LCD Status Indicator – Yes
📊 Coefficient of Performance (COP) –
STIEBEL ELTRON INSTANT ELECTRIC INSTALLATION
Stiebel Eltron DEL 27 Plus Installation Brisbane & Gold Coast
JR Gas & Water supplies and installs the Stiebel Eltron DEL 27 Plus across eligible Brisbane and Gold Coast service areas. It is a high-output three-phase electric instantaneous water heater designed to provide electronically controlled hot water on demand without a conventional storage tank.
The DEL 27 Plus is rated at 28kW on a 415V three-phase supply and draws approximately 38.9A per phase. Stiebel Eltron designs the model for one or several draw-off points, making it suitable for selected whole-home and multi-outlet applications where the available electrical supply and expected flow demand are appropriate.
Because electric instantaneous systems place a substantial load on the electrical supply while operating, correct selection depends just as much on the property as the appliance. Three-phase capacity, switchboard condition, circuit protection, cable sizing, incoming water temperature, expected simultaneous demand and the plumbing layout all need to be considered before installation.
Stiebel Eltron DEL 27 Plus at a glance: The DEL 27 Plus is a German-made 28kW three-phase instantaneous electric water heater with electronic 3i control, 20–50°C temperature adjustment, 2.5L/min minimum switch-on flow and multi-outlet capability. It requires approximately 38.9A per phase at 415V, with Stiebel Eltron recommending confirmation of 40A-per-phase supply capacity before installation. JR installs the DEL 27 Plus across eligible Brisbane and Gold Coast areas subject to electrical and hydraulic suitability.
Stiebel Eltron DEL 27 Plus Supply & Installation at a Glance
Product Type
Three-phase electronically controlled instantaneous electric water heater.
Rated Output
28kW at 415V with approximately 38.9A rated current per phase.
Best Suited To
Selected larger apartments, homes and multi-outlet applications with suitable three-phase electrical capacity.
Installation Area
Professional supply and installation across eligible Brisbane and Gold Coast service areas.
Who Is the Stiebel Eltron DEL 27 Plus Best For?
Homes With Suitable Three-Phase Power
The DEL 27 Plus requires a substantial three-phase electrical supply. It makes the most sense where the property already has suitable capacity or where the electrical infrastructure has been specifically designed for this type of load.
Multiple Outlet Applications
Stiebel Eltron designs the DEL Plus for one or several draw-off points. The 27 Plus is the highest-output model in the range and can suit selected homes needing more capacity than the DEL 13 or DEL 18 Plus.
Properties Where Tank Space Is Limited
At only 466mm high, 225mm wide and 116mm deep, the DEL 27 Plus can provide a practical hot water solution where installing a conventional storage cylinder would use valuable floor space.
PRODUCT SUITABILITY
Is the Stiebel Eltron DEL 27 Plus Right for My Home?
A Good Choice If...
Your property has confirmed three-phase capacity, you want tankless electric hot water, your expected flow demand suits a 28kW unit and you value precise electronic temperature control in a compact wall-mounted appliance.
Consider Another Option If...
The home does not have suitable three-phase supply, simultaneous demand is very high, or the required electrical upgrade would make a storage, heat pump or gas continuous-flow system more practical overall.
JR Should Check First If...
You are converting from storage hot water, replacing an older instant-electric system with a different electrical load, have limited switchboard capacity or expect several high-flow outlets to operate simultaneously.
How Much Hot Water Can the DEL 27 Plus Deliver?
Instantaneous electric hot water output depends on the temperature rise required. The colder the incoming water and the hotter the selected outlet temperature, the less flow one heater can maintain at the target temperature.
Stiebel Eltron's Queensland product-selection guide uses approximately 18L/min at a 22°C temperature rise as the reference performance figure for the DEL 27 Plus. The manufacturer describes this as approximately two mixed showers under the stated conditions.
This is why litres per minute should never be assessed without temperature rise. Brisbane and Gold Coast inlet-water temperatures, shower flow rates and simultaneous use can all affect real-world delivery.
How Does the Stiebel Eltron DEL 27 Plus Work?
The DEL 27 Plus heats water as it flows through the appliance rather than maintaining a tank of stored hot water. When sufficient flow is detected, the bare-wire heating system activates and the electronic controller adjusts power to achieve the selected outlet temperature.
Stiebel Eltron's 3i Technology continuously monitors key operating conditions and adjusts output to maintain a stable delivery temperature up to the available capacity of the heater.
The process is straightforward: a hot tap opens → the heater detects water flow → the electronic control determines the required power → the bare-wire heating system heats the water as it passes through → hot water is delivered at the selected temperature.
Key Features of the Stiebel Eltron DEL 27 Plus
28kW Three-Phase Output
The DEL 27 Plus is the highest-output model in the DEL Plus range and is rated at 28kW on a 415V three-phase supply.
3i Electronic Control
Three sensors monitor operating conditions so the unit can electronically control power and maintain the selected hot water temperature within its performance limits.
20–50°C Temperature Adjustment
The DEL Plus allows direct temperature adjustment between 20°C and 50°C and includes temperature memory functions for user convenience.
50°C AS3498 Output
The Australian DEL Plus is designed to limit hot water output to 50°C in accordance with AS3498, eliminating the need for a separate tempering valve in applications where the compliant 50°C outlet is appropriate.
ECO Mode
Selectable ECO modes can limit maximum flow to help maintain a stable outlet temperature and reduce unnecessary water and energy use.
Compact German-Made Design
The unit measures only 466 × 225 × 116mm, weighs 3.2kg and is manufactured in Germany.
Stiebel Eltron DEL 27 Plus Specifications
| Specification | Details |
|---|---|
| Brand | Stiebel Eltron |
| Model | DEL 27 Plus |
| Article Number | 236742 |
| Product Type | Three-phase electric instantaneous water heater |
| Rated Output at 415V | 28kW |
| Rated Current at 415V | 38.9A per phase |
| Electrical Supply | 3/PE three phase |
| Manufacturer Supply Guide | 40A per phase capacity to be confirmed by electrician |
| Minimum Switch-On Flow | 2.5L/min |
| Maximum Permissible Pressure | 1MPa |
| Temperature Adjustment | 20–50°C |
| Maximum Outlet Temperature | 50°C |
| Dimensions | 466 × 225 × 116mm |
| Weight | 3.2kg |
| Nominal Internal Capacity | 0.4L |
| Heating System | Bare-wire heating system |
| IP Rating | IP25 / IP24 at electrical connection on finished walls |
| Multiple Outlets | Yes |
| Pre-Heated Water Compatible | Yes, incoming water must not exceed 50°C |
| Temperature Memory | Yes |
| Display | Backlit multifunction display |
| Country of Manufacture | Germany |
| Approvals | WaterMark WMKA00301 / AS3498 |
| Domestic Manufacturer Warranty | 7 years full parts and labour |
| Commercial Manufacturer Warranty | 1 year full parts and labour |
INSTALLATION REQUIREMENTS
What Is Required to Install the Stiebel Eltron DEL 27 Plus?
The DEL 27 Plus is physically compact, but its electrical requirements are substantial. Electrical suitability should be confirmed before assuming a property can support the appliance.
Suitable 415V three-phase electrical supply
Approximately 40A available per phase
Correct circuit protection and cable sizing
Electrical installation compliant with AS/NZS 3000
Suitable switchboard capacity
Appropriate hardwired electrical connection
Suitable hot and cold water pipework
Maximum permissible water pressure not exceeded
Practical wall-mounting location
Access for future servicing
Protection from weather if installed externally
Licensed plumbing and electrical installation
Having three-phase power at the property does not automatically mean there is enough spare capacity for the DEL 27 Plus. Stiebel Eltron recommends having an electrician confirm the available amps per phase.
What's Included With Stiebel Eltron DEL 27 Plus Installation?
Standard Installation
The selected JR installation package covers the applicable plumbing and installation work shown in the live product selector. A like-for-like replacement can be relatively straightforward where the existing location, water services and electrical circuit already suit the DEL 27 Plus.
Testing & Commissioning
The unit is filled, connected, tested and commissioned, with water flow, electrical operation, selected temperature and overall system performance checked before handover.
Possible Additional Work
Switchboard upgrades, new cabling, circuit protection changes, three-phase supply work, plumbing alterations, pressure control or relocation can increase the installation scope and may require additional quotation.
How Much Does Stiebel Eltron DEL 27 Plus Installation Cost?
Current supplied-and-installed pricing is shown through the live JR product and installation selector above. This keeps the displayed price aligned with the selected package and avoids hard-coding an installation figure that may not suit every property.
The main cost variable with the DEL 27 Plus is often electrical work. A true like-for-like replacement where the existing three-phase circuit already meets the manufacturer's requirements can be simpler than a conversion requiring new three-phase cabling, switchboard modifications or additional supply capacity.
Plumbing relocation, pressure-control work, difficult access and changing from another hot water technology can also alter the final installation price.
BRISBANE INSTALLATION
Stiebel Eltron DEL 27 Plus Installation Brisbane
JR Gas & Water supplies and installs the Stiebel Eltron DEL 27 Plus across eligible Brisbane service areas. It can be particularly relevant to apartments, compact homes and properties where an existing three-phase instantaneous water heater is already installed and a tankless replacement is preferred.
For Brisbane replacements, checking the existing circuit breaker and cable capacity is one of the first steps. Older three-phase instantaneous systems do not all have the same electrical load, so the existence of an old three-phase heater does not automatically confirm that the DEL 27 Plus can be connected without electrical changes.
JR also services eligible surrounding areas including Logan, Ipswich, Moreton Bay and Redlands, with final installation scope based on the individual property and electrical setup.
GOLD COAST INSTALLATION
Stiebel Eltron DEL 27 Plus Installation Gold Coast
Gold Coast DEL 27 Plus installations need to balance electrical capacity with the property's expected hot water demand. The compact unit can work well where floor space is limited, but the high instantaneous electrical load means correct electrical design remains essential.
For apartments and townhouses, body-corporate or building electrical infrastructure may also influence whether the required three-phase capacity is available. For detached homes, switchboard capacity and the existing incoming supply should still be confirmed before the system is ordered as a new conversion.
Where an existing compatible Stiebel Eltron or other three-phase instantaneous heater is being replaced, the job may be considerably simpler if the electrical and water services already satisfy the DEL 27 Plus requirements.
Can the Stiebel Eltron DEL 27 Plus Replace My Existing Hot Water System?
Replacing Three-Phase Instant Electric
This is usually the closest replacement pathway. The existing circuit breaker, cable sizing, water connections and mounting position still need to suit the DEL 27 Plus.
Replacing Electric Storage
Changing from storage to instantaneous removes the cylinder but introduces a much higher electrical load while hot water is being used. Significant electrical work may be required.
Replacing Gas Continuous Flow
The compact wall-mounted format can be similar, but the energy source is completely different. A suitable 28kW three-phase electrical supply must be established before conversion is practical.
Replacing a Smaller DEL or DHB-E
Moving from a 13kW or 18kW model to the DEL 27 Plus can materially increase electrical demand, so the existing circuit cannot simply be assumed suitable for the larger heater.
Which Stiebel Eltron DEL Plus Size Do I Need?
| Feature | DEL 13 Plus | DEL 18 Plus | DEL 27 Plus |
|---|---|---|---|
| Rated Output | 14.5kW | 19.4kW | 28kW |
| Rated Current | 20A/phase | 27A/phase | 38.9A/phase |
| Supply | 3 phase | 3 phase | 3 phase |
| Minimum Switch-On Flow | 2.5L/min | 2.5L/min | 2.5L/min |
| Temperature Range | 20–50°C | 20–50°C | 20–50°C |
| Dimensions | 466 × 225 × 116mm | 466 × 225 × 116mm | 466 × 225 × 116mm |
| Typical Reason to Consider | Lower-demand applications | Medium-demand applications | Highest-output DEL Plus option |
The correct model should be selected from both hot water demand and electrical capacity. Choosing a larger instantaneous heater does not help if the property cannot supply the required current.
DEL 27 Plus vs Stiebel Eltron DHE 27 AU
The DEL 27 Plus and DHE 27 AU are both 28kW-class three-phase Stiebel Eltron instantaneous water heaters, but they target different levels of control and outlet-temperature flexibility.
| Feature | DEL 27 Plus | DHE 27 AU |
|---|---|---|
| Rated Output | 28kW | 28kW |
| Supply | Three phase | Three phase |
| Maximum Temperature | 50°C | 60°C |
| Control Technology | 3i | 4i |
| Display | Backlit multifunction | Premium multifunction control |
| Key Positioning | High-output 50°C whole-home / multi-outlet option | Premium higher-temperature and advanced-control option |
The DEL 27 Plus can be a strong fit where a compliant 50°C maximum outlet temperature is suitable. The DHE 27 AU may be more appropriate where the application needs higher selectable temperatures or its more advanced control platform.
COMMON QUESTIONS
Stiebel Eltron DEL 27 Plus Installation FAQs
How much does Stiebel Eltron DEL 27 Plus installation cost?
Current supplied-and-installed pricing is shown in JR's live product selector. Final cost depends heavily on whether the property already has a compliant three-phase circuit or requires switchboard, cabling or supply upgrades.
Can JR install the DEL 27 Plus in Brisbane?
Yes. JR installs electric instantaneous systems across eligible Brisbane service areas, subject to plumbing and electrical suitability.
Can JR install the DEL 27 Plus on the Gold Coast?
Yes. Installation is available across eligible Gold Coast areas where the property has suitable three-phase capacity and the hot water demand matches the appliance.
Does the DEL 27 Plus require three-phase power?
Yes. The DEL 27 Plus is a three-phase instantaneous heater rated at 28kW and approximately 38.9A per phase at 415V.
Is having three-phase power enough to install the DEL 27 Plus?
Not necessarily. Stiebel Eltron recommends having an electrician confirm that sufficient amperage is available per phase. The DEL 27 Plus requires approximately 40A per phase capacity.
Can the DEL 27 Plus run two showers?
Stiebel Eltron's Queensland guide uses approximately 18L/min at a 22°C temperature rise as a reference equivalent to two mixed showers. Actual performance depends on incoming water temperature, outlet temperature and shower flow rates.
Does the DEL 27 Plus need a tempering valve?
The Australian DEL Plus is designed to deliver water not exceeding 50°C in accordance with AS3498, so a separate tempering valve is not required where that compliant 50°C outlet is appropriate.
Can the DEL 27 Plus be installed in a cupboard?
Yes, subject to the installation instructions and service access. Stiebel Eltron states that the DEL Plus does not require a flue, ventilation, relief drain or safe tray.
Can the DEL 27 Plus be installed outside?
It can only be installed outdoors where it is protected from the weather, such as within a suitable enclosure or meter box, in accordance with Stiebel Eltron's installation requirements.
Can the DEL 27 Plus accept pre-heated water?
Yes. Stiebel Eltron states that the DEL Plus can accept pre-heated water, including from solar or heat pump sources, provided incoming water does not exceed 50°C.
What warranty does the DEL 27 Plus have?
Stiebel Eltron currently provides a 7-year full parts-and-labour warranty for domestic use and 1 year for commercial use, subject to its warranty conditions.
Can the DEL 27 Plus replace a storage hot water system?
Potentially, but the electrical requirements are very different. A storage system uses lower electrical power over a longer period, while the DEL 27 Plus requires a large three-phase load while hot water is being drawn.
Stiebel Eltron DEL 27 Plus Warranty and Maintenance
Domestic Manufacturer Warranty
Stiebel Eltron currently provides 7 years full parts and labour for DEL Plus units used for domestic purposes, subject to the manufacturer's warranty conditions.
Commercial Warranty
Stiebel Eltron currently lists 1 year full parts and labour for DEL Plus units used for commercial purposes.
Ongoing Maintenance
Water quality, flow, electrical connections and inlet screening should remain suitable for the appliance, and any servicing should follow Stiebel Eltron's installation and operating instructions.
Why Choose JR Gas & Water for DEL 27 Plus Installation?
Instantaneous electric hot water needs to be selected from the property backwards. The most important questions are available electrical capacity, required hot water flow, inlet water temperature and the number of outlets expected to operate at the same time.
JR Gas & Water has completed more than 10,000 hot water installations across South East Queensland and provides hot water installation across Brisbane, the Gold Coast and eligible surrounding service areas. JR's live product packages help separate straightforward like-for-like replacements from installations requiring additional electrical or plumbing work.
For a high-output system like the DEL 27 Plus, that installation-led approach reduces the risk of buying a technically capable appliance that the property cannot properly support.
COMPARE YOUR OPTIONS
Compare Instant Electric Hot Water Systems
Compare the DEL 27 Plus with other three-phase instantaneous systems and alternative hot water technologies before choosing the final replacement.
READY TO INSTALL
Install the Stiebel Eltron DEL 27 Plus With JR Gas & Water
The Stiebel Eltron DEL 27 Plus is a compact, German-made 28kW instantaneous electric water heater for properties with suitable three-phase electrical capacity and hot water demand that matches its available flow.
The critical pre-installation check is the electrical supply. Where the property already has a suitable three-phase circuit and compatible water services, the DEL 27 Plus can provide a clean, tankless replacement. Where electrical upgrades or a system-type conversion are required, JR can assess the additional work before installation.
Gas continuous flow hot water systems provide hot water on demand, heating water only as it passes through the appliance. With no storage tank, these systems are highly efficient and can provide an endless supply of hot water when correctly sized and maintained.
Like any gas appliance, regular maintenance is recommended to ensure safe operation, maintain peak efficiency and support your manufacturer's warranty.
Homeowner Maintenance – Every 6 Months
Every six months we recommend carrying out a simple visual inspection of your continuous flow hot water system.
Homeowners should:
- Check for water leaks around the unit and pipework.
- Ensure the gas supply is turned on.
- Keep the area around the appliance free from leaves, dirt and debris.
- Ensure the air intake and flue terminal remain unobstructed.
- Inspect visible pipework for corrosion or damage.
- Listen for unusual noises during operation.
- Confirm the unit is producing hot water at the correct temperature.
Why is this important?
Gas continuous flow systems rely on unrestricted airflow and proper gas combustion to operate safely and efficiently.
Blocked vents, debris, water leaks or damaged pipework can reduce performance, increase gas consumption and potentially lead to system faults.
Regular visual inspections help identify problems before they become expensive repairs.
JR 6-Month Gas Continuous Flow Health Check
Recommended Service – $99
Our professional inspection helps ensure your gas continuous flow hot water system continues operating safely and efficiently.
Our technician will:
- Inspect the complete hot water unit.
- Check for water leaks and corrosion.
- Inspect gas pipework and fittings.
- Perform a gas leak test.
- Check burner operation.
- Inspect ignition performance.
- Check heat exchanger condition.
- Inspect the flue and air intake.
- Test water temperature and flow.
- Inspect electrical connections and controller operation (where fitted).
- Check isolation valves and filters.
- Identify components showing signs of wear.
Service Price: $99
Routine inspections help maximise efficiency, reduce operating costs and minimise the likelihood of unexpected breakdowns.
If Your Hot Water System Isn't Working
Before arranging a service, check the following:
- Ensure the gas supply is turned on.
- Check whether other gas appliances in your home are operating.
- Confirm the electrical power is switched on, as most continuous flow systems require electricity for ignition and controls.
- Check the circuit breaker or isolation switch.
- Ensure there is adequate water flow, as the unit will not ignite below its minimum operating flow rate.
- Check the controller for any error codes (where fitted).
- Ensure the air intake and flue terminal are free from obstructions.
- Look for any visible water leaks.
If your system still isn't producing hot water, contact JR Gas & Water for professional diagnosis and repair.
General Signs Your System May Need Attention
Arrange a service if you notice:
- No hot water.
- Fluctuating water temperatures.
- Water not reaching the selected temperature.
- Error codes displayed on the controller.
- Reduced water flow.
- Water leaking from the unit.
- Unusual burner or fan noises.
- Visible corrosion.
- Higher than normal gas consumption.
- Ignition failures or repeated shutdowns.
Early servicing can often prevent costly repairs and keep your hot water system operating reliably.
Protect Your Warranty & Maximise System Life
Routine maintenance helps keep your gas continuous flow hot water system operating safely, efficiently and reliably.
Following the manufacturer's recommended maintenance schedule may also assist in maintaining warranty coverage.
Failure to maintain your system may result in:
- Reduced heating efficiency.
- Increased gas consumption.
- Ignition or burner faults.
- Heat exchanger damage.
- Unexpected loss of hot water.
- Shortened component lifespan.
- Possible reduction or loss of manufacturer warranty, depending on the manufacturer's maintenance requirements.
Preventative maintenance is a cost-effective way to protect your investment, maintain efficient operation and maximise the life of your gas continuous flow hot water system.
Please note: Maintenance requirements vary between manufacturers and models. Always refer to your owner's manual for the maintenance schedule applicable to your gas continuous flow hot water system. JR Gas & Water services all major gas continuous flow hot water brands in accordance with manufacturer recommendations where applicable.
If you're in Queensland and considering a new electric hot water system, JR Gas & Water is the company to choose. Here's why:
Experience and Expertise: JR Gas & Water has over 10 years of experience in the gas and plumbing industry. Their team of licensed and insured professionals is highly skilled and knowledgeable about all aspects of electric hot water system installation, maintenance, and repair. They can provide expert advice on the best system for your needs and ensure a smooth installation process.
Quality Products: JR Gas & Water uses only high-quality products from trusted brands to ensure your electric hot water system is reliable and efficient. They also offer a range of options to suit different budgets and requirements.
Competitive Pricing: JR Gas & Water offers competitive pricing for their electric hot water systems, ensuring that you get a great value for your investment. They also provide a detailed quote upfront, so there are no surprises or hidden costs.
Customer Service: JR Gas & Water is committed to providing excellent customer service. They are always available to answer any questions or concerns you may have and are committed to ensuring your satisfaction.
Local Business: JR Gas & Water is a locally owned and operated business in Queensland. By choosing them for your electric hot water installation, you are supporting a local business and contributing to the local economy.
Warranty and Guarantee: JR Gas & Water provides a warranty and guarantee on all their products and services, giving you peace of mind knowing that your system is covered in case of any issues.
Energy Efficiency: Electric hot water systems can be energy efficient, and JR Gas & Water can help you choose the right system for your needs. They can provide advice on energy-saving features and options, such as timers and thermostats, to help you save on your energy bills.
Safety: JR Gas & Water is committed to safety and ensuring that all installations are done to the highest safety standards. They are also familiar with local safety regulations and requirements, ensuring that your electric hot water system is installed safely and in compliance with all relevant codes.
JR Gas & Water is a reliable and experienced choice for your electric hot water system installation in Queensland. With a commitment to quality products, competitive pricing, excellent customer service, and safety, they can help you make the switch to a more efficient and cost-effective solution for your hot water needs. Contact them today to learn more about their services and how they can help you.