Stiebel Eltron DEL18 vs DEL27 vs DHE18 vs DHE27: Three Phase Power Instant Hot Water Systems Comparison
Instant hot water systems are a popular water heater option in Australian households. This plumbing fixture supplies hot water on demand by using an electrically powered heating element and eliminating the need for cumbersome accessories like storage tanks.
Stiebel Eltron is one of the most trusted brands on the market with various instant hot water systems available. In this blog, we’ll be comparing the DEL18, DEL27, DHE18 and DHE27 models to provide you with the information to make the best choice for your home.
Is it Time to Upgrade Your Instant Electric Hot Water Heater?
Knowing when to upgrade your hot water heater is often a lot simpler than you may think. If your system has exceeded its expected lifespan (usually 8–15 years), is struggling to maintain heat or cutting out completely, or if repairs will cost more than half the initial cost of the system, these are all good signs that it’s time to move on to a new system. The good news is that technology has come a long way in the last decade or so since you bought your last system.
When buying your next system, there are a few factors to keep in mind to ensure you’re buying the best system for you:
- Unit size and whether it is suitable for the size of your home.
- Power of the unit.
- Hot water capacity of the unit.
- Features of the hot water heater.
- Price of the unit, including both short-term and long-term costs.
Pros and Cons of an Instantaneous Hot Water Heater
Pros
- Take up less space: Instantaneous hot water heaters don’t require storage tanks, ventilation or a safe tray, which means they take up a lot less space. This offers installation flexibility as to where you can install your heater.
- On-demand hot water: Instantaneous water means no more wait times to get hot water or waiting for pre-heated water.
- Energy efficient: Because water is heated when needed and not being stored and repeatedly reheated, your instantaneous heater will use less energy than a traditional electric hot water system.
- Longevity: Due to not having a storage tank, three-phase instant hot water systems tend to last longer. Some last between 15 and 20 years.
Cons
- Lower water pressure: Some models of instant hot water systems have been reported to have lower water pressure than other system types.
- Higher installation price: Electric instantaneous hot water systems tend to cost more to purchase and install.
Stiebel Eltron DEL18
Product overview
The Stiebel Eltron DEL18 provides instant hot water to your home without taking up too much space. Whenever you turn on the tap, your heater will turn on and when you turn the tap off your heater will switch off. This size is best suited for apartments or homes with one bathroom. If you need to service two bathrooms, we recommend buying the DEL27.
Price: View latest pricing here
Location: Outdoor
Warranty
- 5 years for domestic parts and labour
- 1 year for commercial parts and labour
Pros
- Electric control allows you to precisely regulate hot water temperature.
- Easy to install.
- Energy efficient.
Cons
- More expensive than other heating options.
- Not adequate for larger houses with two bathrooms.
Stiebel Eltron DEL27
Product overview
The Stiebel Eltron DEL27 has an output of 28kW meaning it’s the best choice if your home has two bathrooms. An ideal model for families or living situations with four to six people, the DEL27 provides reliable hot water while cutting down your energy costs. Your heater will automatically turn on and off with your tap.
Price: View latest pricing here
Location: Outdoor
Warranty
- 5 years for domestic parts and labour
- 1 year for commercial parts and labour
Pros
- Great for larger houses with two bathrooms.
- Cut down on energy costs.
- Easy to install.
Cons
- More expensive initial costs.
- Might be overcompensation for a house with one bathroom.
Stiebel Eltron DHE18
Product overview
Using the latest 4i technology to provide fast and reliable hot water, the Stiebel Eltron DHE18 is a fantastic unit for a smaller home. Ideal for households with one bathroom, the DHE18 is compact and offers versatility with installation options.
Price: View latest pricing here
Location: Outdoor
Warranty
- 5 years for domestic labour
Pros
- Programmable temperature selection to control output water temperature.
- Compact design.
- Sensors to precisely regulate hot water output.
Cons
- More expensive than other models.
- Might not be suitable for a home with two bathrooms.
Stiebel Eltron DHE27
Product overview
The number one priority of the Stiebel Eltron DHE27 is to provide a reliable service and a precise hot water temperature. Using 4i technology, the DHE27 delivers instantaneous hot water with precision and compensates for fluctuations. These units also other a wide range of benefits compared to other models, including temperature control and easy-to-use controls. It can reach a maximum of 50 °C with no tempering valve or storage tank required.
Price: View latest pricing here
Location: Outdoor
Warranty
- 5 years for domestic parts and labour
- 1 year for commercial parts and labour
Pros
- Can adjust the temperature in accordance with your preference.
- Compact, easy-to-install design.
- Sensors to precisely regulate hot water output.
Cons
- Higher initial costs than other instant water heaters.
Which Continuous Flow Hot Water System is Best for You?
There isn’t one choice that will suit every home, so you’ll need to find the best model for you. Size is one of the key factors to consider when choosing your unit. For smaller homes or lower water needs, either the DEL18 or DHE18 will suit you fine. For bigger houses that have more demand, go with one of the larger models. When deciding, consider how many hot water outlets you need to service your household’s needs and what model is best suited to handle this demand. If unsure, discuss your situation with a hot water expert.
Is it time for you to replace your hot water heater? Same Day Hot Water Service is your one-stop shop for all your hot water heater needs. From installation to maintenance and repairs, we can ensure you get the right hot water system for your home. For expert advice or to purchase your new hot water heater, get in touch with our friendly team today.
