💡 Hot water cylinders work hardest alongside a heat pump — the cylinder stores the heat pump's output for domestic hot water, cutting fossil fuel use to near zero. SEAI grants of up to €1,600 available for hot water cylinders. Apply at seai.ie →
Kingspan Albion Ultrasteel Duplex HP 180L — Ireland 2026
Stainless steel for life — 25-year corrosion-free warranty for hard water areas
Kingspan Albion manufactures this cylinder in Ireland using duplex stainless steel — a grade specifically chosen for resistance to the corrosive effects of Irish hard water and the chloride-rich air in coastal areas. Where a copper cylinder might develop pinhole leaks after 15–20 years in high-hardness water areas (particularly Dublin, Kildare, Meath and coastal counties), the Ultrasteel carries a 25-year corrosion warranty. The 3.0 m² primary coil is fully sized for heat pump low-temperature operation. The lowest standing heat loss of any vented cylinder in this directory at 1.18 kWh/24h.
180L3m² HP coil25-yr warrantyDuplex stainlessVented🇮🇪 Made in IrelandSEAI: part of HP grant
⚙️ Specifications
Capacity
180 litres
Primary (HP) coil area
3 m²
Cylinder type
Vented (gravity-fed cold tank)
Inner material
Duplex stainless steel
Insulation thickness
80 mm
Standing heat loss
1.18 kWh/24h
Max primary temp
80°C
Immersion heaters
2 × 3 kW
Dimensions (H × Ø)
1400 × 545 mm
Weight (empty)
41 kg
Warranty
25 years
Made in Ireland
✅ Yes — Irish manufactured
💰 Pricing & SEAI grant
Cylinder supply price
~€820
Plus installation labour ~€400–€700 · Total installed ~€1,370
💰 Covered by SEAI Heat Pump System Grant (3 Feb 2026)
The cylinder is included as part of your overall heat pump installation cost. The SEAI grant covers the total installed system cost — heat pump, cylinder, controls, pipework and labour — up to:
① Heat Pump Equipment Grant€6,500
② Central Heating Upgrade (inc. cylinder)€2,000
③ Renewable Heat Bonus (fossil fuel switch)€4,000
Maximum total grant€12,500
Apply at seai.ie — receive Letter of Offer before installation begins. BER assessment required (€200 SEAI grant). Homes built before 2007 need Technical Assessment (€200). Installer must be SEAI-registered.
Key highlights
💧
Duplex stainless — immune to Irish hard water
Dublin, Kildare, Meath and many Munster counties have hard water (high calcium/magnesium). Over 15–20 years, hard water deposits and slightly acidic water corrode copper cylinders from the inside. Stainless steel is immune. For any hard water area, Ultrasteel pays for itself in avoided cylinder replacement
🏖️
Corrosion-proof for coastal Ireland
Salty air dramatically accelerates corrosion in coastal properties. The duplex stainless construction makes the Ultrasteel the only cylinder Kingspan recommends without reservation for coastal counties — Clare, Galway, Mayo, Donegal, Kerry, Cork, Waterford, Wexford
❄️
Lowest standing heat loss in this directory
At 1.18 kWh/24h, the Ultrasteel loses less heat overnight than any other vented cylinder listed here — meaning the heat pump reheats less energy every day, directly reducing running costs
🏠 Suitable for
Hard water areasCoastal locationsPremium new buildHeat pumpLong-term installation
Installation note: Vented cylinders require a cold water storage tank (usually in the loft) feeding by gravity. If your home doesn't have a loft tank, discuss with your plumber whether a vented or unvented cylinder is more appropriate for your installation.
✅ What we like
Duplex stainless steel inner — corrosion-proof in hard water and coastal areas
25-year corrosion warranty — the most meaningful long-term guarantee for Irish water conditions
Lowest standing heat loss (1.18 kWh/24h) of any vented cylinder in this directory
3.0 m² HP primary coil — fully optimised for heat pump temperatures
Irish-manufactured — Kingspan Albion facility in Ireland
Lighter than copper equivalent at same capacity
⚠️ Worth knowing
Premium price (~€820 vs ~€650 for copper Joule) — stainless carries a cost premium
180L — slightly smaller than 210L alternatives; may need 210L for larger families
Less widely stocked than Joule Cyclone — may require ordering from specialist distributor
🌡️ Compatible heat pump brands
The Ultrasteel Duplex HP 180L is compatible with all major air-to-water heat pump brands. See the Heat Pump Directory for full specifications, pricing and SEAI grant details on all 19 heat pumps available in Ireland.
The Kingspan Albion Ultrasteel Duplex HP 180L cylinder itself costs approximately ~€820. Installation (remove existing cylinder, connect to heat pump primary circuit, commission immersion backup) adds approximately €400–€700. Total installed cost: typically ~€1,370. This is usually included in the overall heat pump installation quote from your SEAI-registered installer — ask for the cylinder to be itemised on the quote so you can compare against other brands.
In most cases, no — your existing cylinder should be replaced as part of the heat pump installation. Standard cylinders have small primary coils (1.5–2.0 m²) designed for boiler temperatures of 70–80°C. Heat pumps deliver water at 45–55°C and need a much larger coil (typically 2.8–3.4 m²) to transfer adequate heat at the lower temperature. The Kingspan Albion Ultrasteel Duplex HP 180L has a 3 m² primary coil — specifically sized for heat pump low-temperature operation. Using a standard cylinder with a heat pump results in slow reheat, inefficient operation, and higher running costs.
Yes — the cylinder cost is included within the SEAI Heat Pump System Grant (up to €12,500 for houses switching from fossil fuel heating, from 3 February 2026). The grant is applied to the total installed system cost including heat pump, cylinder, controls, pipework and labour — not as a separate per-component payment. Cylinders are not individually grant-funded as standalone items. A BER assessment is required before the grant can be drawn down, and all work must be carried out by a SEAI-registered contractor. The Kingspan Albion Ultrasteel Duplex HP 180L's ~€820 cylinder cost contributes toward the Central Heating Upgrade element of the grant (up to €2,000).
A heat pump cylinder is typically set to 55–60°C to balance legionella risk with heat pump efficiency. Legionella bacteria cannot survive above 60°C. Most heat pump systems include a weekly legionella protection cycle where the immersion heater in the Kingspan Albion Ultrasteel Duplex HP 180L raises the full cylinder to 60–70°C. Day-to-day, the heat pump heats the cylinder to the setpoint temperature (often 50–55°C) — a heat pump's COP drops significantly above 55°C. The Kingspan Albion Ultrasteel Duplex HP 180L's max primary temperature of 80°C accommodates both routine heat pump operation and legionella protection cycles. Your installer will configure the legionella cycle as part of commissioning.
The Kingspan Albion Ultrasteel Duplex HP 180L at 180L is suited to 2–3 person households or properties with limited airing cupboard space. A heat pump heats the cylinder slowly over 2–4 hours (compared to a boiler's rapid reheat) — so the system is usually programmed to heat the cylinder once or twice daily, storing enough hot water for the day's demand. General guideline: allow 40–50 litres per person per day. For a 4-person household with a heat pump: 160–200L minimum. Homes with high shower use or a bath should consider 200–250L.
Standard 304 stainless steel can be susceptible to chloride-induced pitting corrosion in coastal environments — where salt air contains chloride ions. The Kingspan Albion Ultrasteel Duplex HP 180L uses duplex stainless steel, which has a higher chromium and molybdenum content that dramatically increases resistance to chloride attack. Kingspan Albion specifies duplex rather than standard 304 stainless because of the prevalence of coastal locations in Ireland. If your property is within 10km of the coast (Cork, Clare, Galway, Mayo, Donegal, Kerry, Wexford), duplex stainless is the correct specification — copper and standard 304 stainless both degrade faster in salt air over a 25-year lifetime.
Kingspan Albion manufacturing in Ireland means parts, warranty support and replacement components are held locally — not shipped from overseas depots with 2–4 week lead times. For a heat pump system that is your primary heating source, a warranty claim requiring a new cylinder should not leave your home without hot water for weeks. Irish-manufactured cylinders also mean shorter supply chains, typically lower logistics-related carbon, and supporting Irish employment. The 25-year warranty on the Kingspan Albion Ultrasteel Duplex HP 180L is backed by a local manufacturer — not a foreign subsidiary — giving greater confidence in long-term warranty support.
Heat transfer through a coil depends on temperature difference (ΔT), flow rate, and coil surface area. In a boiler system, ΔT is large (boiler at 75°C, cylinder at 55°C → ΔT = 20°C) — even a small coil transfers heat quickly. In a heat pump system, ΔT is small (HP at 50°C, cylinder at 45°C → ΔT = 5°C). With a small ΔT, you need a much larger coil surface area to transfer the same heat. The Kingspan Albion Ultrasteel Duplex HP 180L's 3 m² primary coil compensates for the low temperature differential, allowing the heat pump to operate at lower, more efficient flow temperatures without sacrificing reheat time. Standard boiler cylinders typically have only 1.5–2.0 m² coils — using one with a heat pump results in slow reheat and the heat pump working harder and less efficiently.
For hard water areas (Dublin, Kildare, Meath, parts of Munster) and coastal locations, yes — strongly. Copper cylinders in high-hardness water areas frequently develop pinhole corrosion after 15–20 years, requiring complete cylinder replacement at €800–1,200 installed. The Kingspan Ultrasteel costs ~€170 more upfront and avoids that replacement entirely. Over a 25-year period in a hard water area, stainless is almost always the more cost-effective choice. For soft water areas (most of Connacht, Munster west coast, Donegal), copper is perfectly adequate and the saving is a reasonable decision.
Standard 304 stainless steel can be susceptible to chloride-induced pitting corrosion in coastal environments — where salt air contains chloride ions. Duplex stainless steel has a higher chromium and molybdenum content that dramatically increases resistance to chloride attack. Kingspan specifies duplex rather than standard 304 stainless because of the prevalence of coastal locations in Ireland where standard stainless would still corrode over a 25-year lifetime. If your property is within 10km of the coast, duplex stainless is the correct specification.
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🏡 Built for holiday lets, Airbnb hosts & short-term rental
Guest EV charging — automated, no host involvement required
Holiday home and short-term let owners with a heat pump and EV charger can offer guest charging on Pure Energy — fully automated. Set up once, generate a QR code, and let guests book, check in and check out without any host involvement. Include complimentary charging as a listing USP or set a per-session charge.
☀️ Pure Energy🔄 Smart Energy🚀 Boost Energy
📱
Zero host involvement
Guests book, check in and check out via the app — you receive notifications without lifting a finger
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Pure Energy as a USP
Market your property as offering 100% renewable-powered EV charging — increasingly sought after on Airbnb
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Free or paid — your choice
Set charging free with a promo code, or earn per session — toggle any time from the host dashboard
The Kingspan Albion Ultrasteel Duplex HP 180L is designed to work with the following heat pumps, solar diverters and smart energy products from our Irish directories.
Solar diverters — use surplus solar for free hot water
This cylinder has an immersion heater — which means it can receive free hot water from surplus solar. A solar diverter intercepts solar surplus before it exports to the grid and redirects it straight to your immersion, typically providing 60–80% of annual hot water from the sun. Payback is usually under 18 months.
A 4kWp solar system generates approximately 3,600 kWh/year in Ireland. With a solar diverter redirecting surplus to this cylinder's immersion heater, you can cover 60–80% of annual hot water energy for free — on top of the heat pump doing the heavy lifting.
EV charger + home battery — run everything on solar
Your heat pump and this cylinder provide low-carbon heating and hot water. Add solar panels, a home battery and an EV charger and you can power your car, your heating and your hot water from the same roof — the combined SEAI grants available reach up to €14,600.
A hot water cylinder upgrade is often the first step in a wider home energy transformation. With a solar diverter filling your cylinder for free during the day, the next natural step is an EV — charged overnight on cheap night-rate electricity or from surplus solar. See all 205+ EVs in the EV Vehicle Directory.
💧 Solar hot water + EV: your whole home running on free energy
☀️ Solar diverter
Free hot water
surplus solar → cylinder
🚗 Smart EV charger
Free driving
surplus solar → your EV
💶 Combined saving
~€3,000/yr
hot water + fuel combined
A myenergi Eddi fills your cylinder with free solar. A myenergi Zappi in Eco+ mode fills your EV with whatever solar is left — both share generation data via the Hub so they never compete. View myenergi Eddi →
