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Sunniva Heatpumps
      • Home
      • Products
      • Blog
      • Founder's Desk
      • Contact us
      • Calculator
        • Commercial Hot Water Heat Pump
        • Swimming Pool Heat Pump Calculator
    • Follow us
    Storage
    Pressurised & non-pressurised

    Ceramic lined tanks — coated against corrosion, clad against loss

    Ceramic-coated against corrosion, with 50 mm rockwool under aluminium cladding. Available pressurised or non-pressurised, for heat pump, solar and industrial storage.

    Size your system Talk to an engineer
    hot out cold in Ceramic coatingRockwool + Al cladding Pressurised or non-pressurised · volumes to order Section — schematic, not to scale

    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

    • The tank sits in a plant room, not a bathroom
    • Your water or your duty is harder than domestic
    • You need capacities beyond a standard cylinder
    • You need a pressurised vessel, or specifically not one

    Look at another range if

    • It is a home or a villa — see Glass Lined Tanks
    • You want tank and machine in one cabinet — see All in One Heat Pump

    Applications

    Where this range is normally installed.

    Heat pump systems
    Solar thermal
    Industrial storage

    Key features

    What is inside the cabinet, and why each of them is there.

    Ceramic corrosion coating

    Chosen where the water chemistry or the duty is harder than a domestic cylinder is built for.

    50 mm rockwool under aluminium cladding

    Mineral wool rather than foam, and a metal jacket rather than plastic — built for a plant room, not a bathroom.

    Pressurised or non-pressurised

    Matched to the circuit rather than forcing the circuit to match the tank.

    Industrial capacities to order

    Benefits

    What this range does for the building, rather than what is in the box.

    Built for plant duty

    Rockwool and aluminium cladding survive a plant room; foam and plastic do not.

    Handles harder water

    Where a domestic lining would be marginal.

    Matched to your circuit

    Pressurised or open-vented as the system requires.

    How much storage does your process need?

    The industrial calculator sizes the buffer or storage volume alongside the machine for each application — a CIP set, a plating line, a jacketed reactor or your own duty.

    Open the calculator

    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.

    Ceramic or glass lined — which do I need?
    Glass lined is the domestic and light-commercial answer: 300 to 500 litres, enamel fired into the steel, anode-protected. Ceramic lined is the plant room answer: harder duty, rockwool and aluminium cladding, pressurised or not, and larger capacities to order.
    Why rockwool rather than foam?
    Temperature and fire. In a plant room the tank may sit near surfaces that a polyurethane foam would not tolerate, and mineral wool does not off-gas.
    What capacities are available?
    Industrial capacities are made to order. Tell us the volume, the working pressure and the water chemistry and we will quote.

    Downloads and related ranges

    All datasheets User manual Service manual Glass Lined TanksCommercial Heat PumpHigh Temperature Heat Pump

    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.

    © 2026 Sunniva Encon LLP. The design and code of this page are our copyright. Results are indicative and offered in good faith — the method is set out above. Confirm the final selection with us before ordering.
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    Welcome to Sunniva Encon, where innovation meets sustainability

    At Sunniva Encon, we specialize in manufacturing high-quality heat pumps designed to meet the unique needs of the Indian market. Since 2012, we've been committed to providing sustainable and efficient heating and cooling solutions.

    Our diverse range of products includes commercial heat pumps, swimming pool heat pumps, high-temperature heat pumps, domestic heat pumps, water-to-water heat pumps, geothermal heating and cooling systems, solar water heaters, electric water heaters, hot water storage tanks, and hybrid solutions.

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