Glass lined tanks — enamel fused to steel at 900 °C
Vitreous enamel fused to steel at 900 °C, CFC-free polyurethane insulation, an Incoloy 800 element and a magnesium anode. Built to pair with a heat pump, a solar collector, gas, or to stand alone.
A tank is not a heat pump, so there is no COP or ambient range here. What matters is the lining, the insulation and the corrosion protection — and how well it pairs with the machine in front of it.
Is this the right range for you?
Two minutes here saves a wasted quotation. The boundaries below are the published ones, not sales judgement.
Yes, if all of these are true
- You need storage to pair with a heat pump or solar
- Your water is hard, or corrosive, or both
- You want a tank that lasts as long as the plant
- 300 to 500 litres covers your storage
Look at another range if
- You need industrial-scale storage — see Ceramic Lined Tanks
- You want tank and machine in one cabinet — see All in One Heat Pump
Applications
Where this range is normally installed.
Key features
What is inside the cabinet, and why each of them is there.
Vitreous enamel fused at 900 °C
Not a coating that is painted on. The glass is fired into the steel, which is why it does not chip off in service.
Magnesium sacrificial anode
Corrodes so the tank does not. Replaceable, and the single cheapest thing you can do to double a tank's life.
Incoloy 800 element
Resists scaling and pitting far better than a standard element in hard Indian water.
CFC-free polyurethane insulation
Standing loss is what a tank costs you every hour it is not being drawn from.
Available in 300, 400 and 500 litres
Benefits
What this range does for the building, rather than what is in the box.
It is the tank that fails, not the machine
In most hot water installations the storage vessel is the first thing to go. The lining and the anode are what decide when.
Pairs with any source
Heat pump, solar, gas or electric — or several at once.
Sized properly, it makes the machine smaller
A heat pump is sized on the day's energy, not the peak draw. The tank rides the morning rush. Undersize it and you pay for a bigger machine.
How much storage do you actually need?
Our commercial hot water calculator sizes the tank alongside the machine — two to six times the hourly output, the rule printed on every Sunniva datasheet. Below two times the machine short-cycles; above six you pay to keep water hot that nobody draws.
And what every Sunniva heat pump gives you
True of the whole range, not just this one.
- Up to 75 % off water heating against electric, LPG or PNG
- Quick payback and strong return on investment
- The longest product life of any common water-heating technology
- Silent operation
- Hot water round the year, independent of sunlight
- Lower carbon emissions
- Negligible maintenance cost
- Saves space against a boiler or a solar-thermal field
Common questions
The ones our engineers are actually asked.
Why does the lining matter so much?
How often should the anode be replaced?
What size tank for my heat pump?
Downloads and related ranges
Performance figures are published test data at the stated conditions and are not a guarantee for a specific installation. Draw-off pattern, pipe runs, water quality, static head and local code all affect the final selection — confirm with Sunniva Encon LLP before ordering.
1
Glass lined tanks — enamel fused to steel at 900 °C
Vitreous enamel fused to steel at 900 °C, CFC-free polyurethane insulation, an Incoloy 800 element and a magnesium anode. Built to pair with a heat pump, a solar collector, gas, or to stand alone.
A tank is not a heat pump, so there is no COP or ambient range here. What matters is the lining, the insulation and the corrosion protection — and how well it pairs with the machine in front of it.
Is this the right range for you?
Two minutes here saves a wasted quotation. The boundaries below are the published ones, not sales judgement.
Yes, if all of these are true
- You need storage to pair with a heat pump or solar
- Your water is hard, or corrosive, or both
- You want a tank that lasts as long as the plant
- 300 to 500 litres covers your storage
Look at another range if
- You need industrial-scale storage — see Ceramic Lined Tanks
- You want tank and machine in one cabinet — see All in One Heat Pump
Applications
Where this range is normally installed.
Key features
What is inside the cabinet, and why each of them is there.
Vitreous enamel fused at 900 °C
Not a coating that is painted on. The glass is fired into the steel, which is why it does not chip off in service.
Magnesium sacrificial anode
Corrodes so the tank does not. Replaceable, and the single cheapest thing you can do to double a tank's life.
Incoloy 800 element
Resists scaling and pitting far better than a standard element in hard Indian water.
CFC-free polyurethane insulation
Standing loss is what a tank costs you every hour it is not being drawn from.
Available in 300, 400 and 500 litres
Benefits
What this range does for the building, rather than what is in the box.
It is the tank that fails, not the machine
In most hot water installations the storage vessel is the first thing to go. The lining and the anode are what decide when.
Pairs with any source
Heat pump, solar, gas or electric — or several at once.
Sized properly, it makes the machine smaller
A heat pump is sized on the day's energy, not the peak draw. The tank rides the morning rush. Undersize it and you pay for a bigger machine.
How much storage do you actually need?
Our commercial hot water calculator sizes the tank alongside the machine — two to six times the hourly output, the rule printed on every Sunniva datasheet. Below two times the machine short-cycles; above six you pay to keep water hot that nobody draws.
And what every Sunniva heat pump gives you
True of the whole range, not just this one.
- Up to 75 % off water heating against electric, LPG or PNG
- Quick payback and strong return on investment
- The longest product life of any common water-heating technology
- Silent operation
- Hot water round the year, independent of sunlight
- Lower carbon emissions
- Negligible maintenance cost
- Saves space against a boiler or a solar-thermal field
Common questions
The ones our engineers are actually asked.
Why does the lining matter so much?
How often should the anode be replaced?
What size tank for my heat pump?
Downloads and related ranges
Performance figures are published test data at the stated conditions and are not a guarantee for a specific installation. Draw-off pattern, pipe runs, water quality, static head and local code all affect the final selection — confirm with Sunniva Encon LLP before ordering.
1