Hot water
Get your airing cupboard back with the modern replacement for your hot water cylinder
The Sunamp Thermino is up to four times smaller than a traditional hot water cylinder, loses no heat sitting around all day, and is designed to last fifty years and counting.
Or call us on 01209 714600. Sunamp installers across Cornwall, Devon, Somerset and Dorset.
- Up to 4× smaller
- No standing heat loss
- 10-year core warranty
- Pairs with solar & Economy 7
How it’s different
Not the hot water cylinder you’re used to
A traditional hot water cylinder heats a large tank of water and keeps it hot all day, whether you need it or not. That’s standing heat loss, and it’s most of what a cylinder actually costs you.
A Sunamp heat battery stores heat in a compact thermal core instead, and releases it on demand as you run the hot tap. No tank of water sitting around losing heat, and up to four times less space taken up.
The honest comparison
How Sunamp compares with what you’ve probably got now
Here’s how the Sunamp Thermino compares with a traditional hot water cylinder and a standalone electric immersion heater.
| Compared | Sunamp Thermino | Hot water cylinder | Electric immersion heater |
|---|---|---|---|
| How it stores heat | Compact thermal core No standing water tank | Large water tank Kept hot all day | Same tank issue Heats water directly in the tank |
| Heat loss | None Only heats what you’ll use | Constant Loses heat to the room all day | Constant Same as any cylinder |
| Footprint | Up to 4× smaller | Bulky Typically a full airing cupboard | Same bulky tank Plus the heating element |
| Tariffs | Solar, Economy 7, EV tariffs | Tied to the heat source Whatever heats the tank | Economy 7 at best No smarter option |
| Warranty | 10 years on the core | Typically 1 to 2 years On a new cylinder | Elements wear out Often replaced every few years |
| Installation | Fitted as part of your system No rebuild needed | Already installed That’s the problem | Already installed That’s the problem |
Sunamp doesn’t just replace your cylinder. It gives you the cupboard space back too.
Common questions
Electric hot water: what people ask us
The questions we’re asked most often by people researching Sunamp and modern hot water across the South West.
What is a Sunamp Thermino, and how is it different from a hot water cylinder?
A Sunamp Thermino is a heat battery. It stores heat in a compact thermal core rather than keeping a large tank of water hot all day, so there’s no standing heat loss and it takes up to four times less space than a traditional cylinder.
How much does a Sunamp cost to install?
It depends on the size of Sunamp your home needs and what it’s replacing, so we don’t quote a figure without seeing your home. Every quote from our free survey is fixed and given in person, with no obligation.
Do you install Sunamp systems, and where?
Yes. We install Sunamp across Cornwall, Devon, Somerset and Dorset, fitted by our own engineers, never subcontractors.
Is a Sunamp cheaper to run than an immersion heater or hot water cylinder?
Usually, yes, because a Sunamp only heats what you’ll actually use rather than keeping a full tank hot all day. The exact saving depends on how much hot water your household uses, which we can talk through during your free survey.
Can a Sunamp work with solar panels or Economy 7?
Yes. Sunamp pairs well with solar PV, Economy 7 and EV tariffs, so it can make use of whichever cheaper or greener electricity your home already has.
How long does a Sunamp last?
Sunamp systems are designed to last fifty years and counting, with a 10-year warranty on the thermal core.
See if Sunamp is right for your home
See what a Sunamp would free up in your home
The brochure covers Sunamp sizing and how it compares with what you’ve probably got now. Or skip straight to a free, no-obligation survey and a fixed quote in person.