Instant Hot Water Systems
SunCity Hot Water supplies, installs, services and repairs Instant Hot Water Systems across the Sunshine Coast, Brisbane, Bribie Island and Gympie — gas continuous flow and German-engineered 3-phase electric, for homes and apartments. Call 1300 728 122.
- Endless hot water on demand
- New installs & fast repairs
- Apartment & high-rise specialists
- Licensed & insured
New Instant Hot Water Installations
Upgrading, renovating or building? We supply and install gas continuous flow and 3-phase electric instant systems, sized to your home or apartment — often the same day.
Get an install quoteInstant Hot Water Repairs
No hot water or an error code? We repair all makes and models of instant and continuous flow systems — gas and electric — with same-day service in most cases and genuine spare parts.
Call for a repairEndless, Efficient Hot Water — On Demand
Instant systems heat water only when you need it, so you get continuous hot water without a bulky storage tank.
Endless Hot Water
Heats water on demand as it flows — so you never run out, no matter how many showers.
Compact & Space-Saving
Wall-mounted with no bulky storage tank — perfect for apartments, units and smaller homes.
Energy Efficient
Only heats water when you use it, with no standby losses from a stored tank.
Gas or 3-Phase Electric
Gas continuous flow or German-engineered 3-phase electric instant systems for high-demand homes and apartments.
Stiebel Eltron DEL & DHE 3-Phase Electric Instant Systems
A large proportion of modern high-rise apartments built in the last decade run on Stiebel Eltron DEL and DHE 3-phase electric instant water heaters — we supply, install and repair them.
Live in a modern apartment? If your building was built in the last 10 years, there's a strong chance your hot water is a Stiebel Eltron DEL or DHE 3-phase electric instant unit. Whether you need a new one installed or an existing unit repaired, our team knows these systems inside out.
Stiebel Eltron DEL Plus
DEL 13 / 18 / 27 Plus
- German engineered and manufactured
- Three output sizes for different applications
- Delivers hot water up to 50°C — no tempering valve required
- 7-year full parts & labour domestic warranty
Stiebel Eltron DHE AU
DHE 18 AU / DHE 27 AU
- German engineered and manufactured
- Premium three-phase continuous flow water heater
- Precise hot water up to 60°C with advanced 4i Technology
- Intelligent electronic temperature control
Upgrading an Older 3-Phase Unit? Meet the Rheem Eclipse
Replacing an ageing 3-phase electric instant system? We most often upgrade our customers to the Rheem Eclipse — a modern 3-phase continuous flow electric water heater that delivers precise, reliable hot water and outstanding value. Prefer to stay with Stiebel Eltron? No problem — we install and repair those too.
- 27kW 3-phase continuous flow
- Endless hot water — no storage tank
- Precise electronic temperature control
- Ideal apartment & whole-home upgrade
Rinnai Infinity Gas Continuous Flow
Prefer gas? Rinnai Infinity delivers endless gas continuous flow hot water — Japanese-built, precise and reliable. We supply, install and repair the full range.
Rinnai Infinity B
The Builders range. Never runs out of hot water, with Puretemp™ temperature stability and quality Japanese design and manufacturing.
Available sizes
Rinnai Infinity B26 Black
Ideal for 2 bathrooms (3 in warmer climates). The reliability of the Builders B26 in a modern black finish, with precise temperature control.
Rinnai Infinity 32
High-capacity continuous flow for larger homes — supplies up to 2–4 shower outlets, so the whole household stays in endless hot water.
Rheem Gas Continuous Flow
6-star Rheem gas continuous flow water heaters — endless hot water on demand, supplied, installed and repaired by SunCity.
Rheem 16L Gas Continuous Flow
6-star gas continuous flow at 16 L/min — ideal for smaller homes, with Rheem Q Factor™ for rapid, stable hot water.
Rheem 20L Gas Continuous Flow
6-star gas continuous flow at 20 L/min — a great fit for average family homes, with steady Q Factor™ temperature control.
Rheem 26L Gas Continuous Flow
6-star gas continuous flow at 26 L/min — for larger homes and multiple bathrooms, with Flamesafe® overheat protection.
Australia's Leading Hot Water Brands
We supply, install & service all major brands.
OMNI X Hot Water Systems
Rheem Hot Water Systems
AquaMAX Hot Water Systems
iHeat Solar Hot Water
iStore Heat Pump Hot Water
Apricus Solar Hot Water
Reclaim Residential
Vulcan Hot Water Systems
Haier Heat Pumps
EvoHeat Heat Pumps
Thermastore
Rinnai Hot Water Systems
Bosch Hot Water Systems
Stiebel Eltron Water Heater
Dux Hot Water SystemsWe Offer a Wide Range of Hot Water Systems
SunCity Hot Water supplies and installs all types of hot water systems, including electric hot water systems, gas hot water systems, solar hot water systems and heat pump hot water systems. Call 1300 728 122 for same-day service.
Our local technicians are part of the SunCity Brisbane hot water systems and Sunshine Coast hot water systems service network — available for same-day hot water system repairs and replacement across South East Queensland. Call 1300 728 122 for same-day service.
FAQs
Instant Hot Water Systems — Frequently Asked Questions
What is an instant hot water system?
An instant hot water system (also called continuous flow, instantaneous or tankless) heats water on demand as it flows through the unit, instead of storing it in a tank. You get endless hot water and never run out, and there are no standby heat losses from a stored tank.
Do you repair instant hot water systems?
What is a 3-phase electric instant hot water system?
A 3-phase electric instant water heater uses a three-phase power supply to heat water instantly at high output — enough for whole-home or apartment hot water without a storage tank. Stiebel Eltron's German-engineered DEL and DHE ranges are the leading choice, and are extremely common in modern high-rise apartments.
Are Stiebel Eltron DEL and DHE systems used in apartments?
Very much so. A large proportion of high-rise apartment buildings constructed in the last decade were fitted with Stiebel Eltron DEL and DHE 3-phase electric instant systems. If you're in a modern apartment and need a new unit or a repair, there's a strong chance it's one of these — and we supply, install and service them.
Is gas or electric instant hot water better?
It depends on your home. Gas continuous flow suits homes with a gas connection, while 3-phase electric instant systems (like Stiebel Eltron DEL/DHE) are ideal for apartments and all-electric homes with the right switchboard. We'll assess your setup and recommend the best option.
Do you install and service instant hot water systems across the Sunshine Coast and Brisbane?
Loved by Local Homeowners
Rated 4.9 out of 5 across hundreds of reviews.
“Booked in the morning, hot water back on by the afternoon. Friendly, tidy and great value.”
“Honest advice and no pushy upsell. Replaced our old system with a heat pump and the bills have dropped.”
“Fantastic service from quote to install. Highly recommend SunCity for anyone needing hot water.”
Need hot water fast?
Get a free quote today — same-day service available across SE QLD.