Cool Energy 500L Buffer Tank in White
Cool Energy 500L Buffer Tank in White

  • FEATURES

  • IN THE BOX

  • WARRANTY

  • DELIVERY & RETURNS

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✔ Multi-source buffer, central thermal hub

✔ 95°C rated, high-temp compatibility

✔ Time-shift heating, tariff optimisation

✔ 1½″ element port, up to 9kW backup

✔ Solar compatible, renewable-ready design

✔ Carbon steel tank, insulated PVC finish

 

The Cool Energy 500 L Buffer Tank CE‑ISPHW500PR is a beautifully considered addition to high‑performance heating systems, offering 500 litres of thermal mass to harmonise multiple heat sources such as heat pumps, boilers or solar input with calm efficiency. Its robust carbon steel cylinder with high‑density polyurethane insulation and PVC outer coat maintains steady water temperature up to about 95 °C while damping rapid temperature fluctuations and reducing frequent cycling for quieter, more reliable operation. Thoughtfully engineered with ready‑to‑fit probe holders and a generous connection for an optional heating element, it brings refined practicality and enhanced system efficiency to discerning renewable and conventional installations alike. 

✔ 1 x Cool Energy 500L Buffer Tank

5-Year Manufacturer Warranty: Cool Energy Buffer Tanks come backed by a 5-year manufacturer warranty, reflecting the brand's commitment to quality and long-lasting craftsmanship. Should a qualifying manufacturing defect arise during normal, everyday use, the manufacturer will arrange for the product to be repaired or replaced, giving you confidence in your purchase for years to come. Please note that this warranty covers manufacturing defects only — it does not extend to cosmetic wear and tear, misuse, accidental damage, incorrect installation, or inadequate maintenance. Valid proof of purchase will be required when making a warranty claim. This warranty is offered in addition to, and does not affect, your statutory rights under the Consumer Rights Act 2015. For any warranty-related queries, please contact us at hello@icecoldspice.com

UK Delivery Once dispatched, we'll send you tracking information so you can follow your order every step of the way. Your order will be delivered to the nearest accessible point at your property boundary — drivers are unable to bring items inside. As this is a heavy item, please have two people available on delivery day. We strongly recommend not booking installers or making any arrangements that depend on a specific delivery date until your order has arrived safely. Estimated delivery date and any associated delivery costs for this product are indicated above the checkout button on this product page. If you would like to clarify this before making your purchase, please give us a call on 020 3740 1246.

Change of mind returns You have 14 days from delivery to notify us of a return by emailing customercare@icecoldspice.com. To process your return, please provide together in one email your order number, whether the return is change of mind, faulty or damaged, clear photos showing the item’s condition and original packaging, and confirmation that the item has not been used or had installation attempted. You then have a further 14 days to return the item. Goods should be returned in their original condition and packaging. Returned items will be inspected and, where an item has been used, installed, damaged or handled beyond what is reasonably necessary, resulting in a reduction in value or resaleability, we reserve the right to make an appropriate deduction from the refund to reflect that loss in value, up to the full purchase price. Any refund due will be issued within 14 days. Rejected deliveries or failed delivery attempts may be treated as change-of-mind returns. Return postage for change-of-mind returns is at your own cost.

Bespoke, made-to-order, and pre-order items These cannot be returned for any reason, unless faulty or not as described. Faulty or incorrect items Please inspect the packaging and item carefully on delivery and report any visible damage before signing for the goods with the driver. We recommend refusing the package if there are visible damages and making this reason clear to the driver. Contact us as soon as possible — and ideally within 48 hours — by emailing customercare@icecoldspice.com with your order number, photos of the item, and a description of the issue. All faulty items are assessed in conjunction with the manufacturer, whose findings will inform the resolution offered.

Faulty or incorrect items Please inspect the packaging and item carefully on delivery and report any visible damage before signing for the goods with the driver. We recommend refusing the package if there are visible damages and making this reason clear to the driver. Contact us as soon as possible — and ideally within 48 hours — by emailing customercare@icecoldspice.com with your order number, photos of the item, and a description of the issue. All faulty items are assessed in conjunction with the manufacturer, whose findings will inform the resolution offered.

For our complete returns policy please click here.

Your statutory rights are not affected.

Are you a trade professional or business customer? Unlock BIG trade benefits including a hidden discount on this product.

✓ Your own private trade discount code, valid for one year
✓ Preferential volume and repeat order rates
✓ Dedicated 1-to-1 WhatsApp support
✓ Bespoke product customisation
✓ Specialist product sourcing

→ Click Here to Unlock Your Free Trade Membership

Cool Energy 500L Buffer Tank

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TRUSTED BY YOU

  • FEATURES

  • IN THE BOX

  • WARRANTY

  • DELIVERY & RETURNS

  • 🔓 UNLOCK TRADE PRICE

✔ Multi-Source Input and Output — Central Thermal Buffer — Designed to combine multiple heat sources as both inputs and outputs, the buffer cylinder acts as the thermal hub of a renewable energy system.

✔ Thermal Mass for System Stability — The buffer adds essential thermal mass to the system, absorbing rapid load fluctuations and minimising compressor and boiler short-cycling during low domestic demand periods.

✔ Up to 95°C Operating Temperature — High-Temperature Compatible — Rated for operating temperatures up to 95°C, accommodating the full output range of high-temperature heat sources and supporting thermal disinfection requirements without system limitation.

✔ Flexible Time-of-Day Heating — Optimised Energy Tariff Management — The ability to heat stored water at different times of day enables intelligent scheduling around off-peak tariffs, solar generation periods, and grid demand signals.

✔ Fixed Coil — Secondary Heat Source Integration — An integrated fixed coil provides a dedicated heat exchange circuit for connection to a secondary heat source, supporting straightforward multi-source system configuration without additional external components.

✔ 1½″ Heating Element Connection — Up to 9kW Direct Electric Backup — A dedicated 1½″ connection accepts specific heating element kits rated up to 9kW, providing direct electric backup or supplementary heating capability when primary heat sources are insufficient.

✔ Ready-to-Install Probe Holders — Simplified Sensor Integration — Pre-installed ½″ threaded probe holders with sensor clips provide immediately accessible temperature sensor connection points, reducing installation time and ensuring accurate system monitoring from commissioning.

✔ Solar Compatible — Fully compatible with solar thermal systems, making the buffer cylinder a natural component within a broader renewable energy installation without additional modification.

✔ Carbon Steel Tank With PUR Insulation and PVC Coating — Raw carbon steel construction with external powder paint finish, high-density polyurethane insulation shells, and a soft PVC external coating.

✔ 1 x Cool Energy 500L Buffer Tank

5-Year Manufacturer Warranty: Cool Energy Buffer Tanks come backed by a 5-year manufacturer warranty, reflecting the brand's commitment to quality and long-lasting craftsmanship. Should a qualifying manufacturing defect arise during normal, everyday use, the manufacturer will arrange for the product to be repaired or replaced, giving you confidence in your purchase for years to come. Please note that this warranty covers manufacturing defects only — it does not extend to cosmetic wear and tear, misuse, accidental damage, incorrect installation, or inadequate maintenance. Valid proof of purchase will be required when making a warranty claim. This warranty is offered in addition to, and does not affect, your statutory rights under the Consumer Rights Act 2015. For any warranty-related queries, please contact us at hello@icecoldspice.com

UK Delivery Once dispatched, we'll send you tracking information so you can follow your order every step of the way. Your order will be delivered to the nearest accessible point at your property boundary — drivers are unable to bring items inside. As this is a heavy item, please have two people available on delivery day. We strongly recommend not booking installers or making any arrangements that depend on a specific delivery date until your order has arrived safely. Estimated delivery date and any associated delivery costs for this product are indicated above the checkout button on this product page. If you would like to clarify this before making your purchase, please give us a call on 020 3740 1246.

Change of mind returns You have 14 days from delivery to notify us of a return by emailing customercare@icecoldspice.com. To process your return, please provide together in one email your order number, whether the return is change of mind, faulty or damaged, clear photos showing the item’s condition and original packaging, and confirmation that the item has not been used or had installation attempted. You then have a further 14 days to return the item. Goods should be returned in their original condition and packaging. Returned items will be inspected and, where an item has been used, installed, damaged or handled beyond what is reasonably necessary, resulting in a reduction in value or resaleability, we reserve the right to make an appropriate deduction from the refund to reflect that loss in value, up to the full purchase price. Any refund due will be issued within 14 days. Rejected deliveries or failed delivery attempts may be treated as change-of-mind returns. Return postage for change-of-mind returns is at your own cost.

Bespoke, made-to-order, and pre-order items These cannot be returned for any reason, unless faulty or not as described. Faulty or incorrect items Please inspect the packaging and item carefully on delivery and report any visible damage before signing for the goods with the driver. We recommend refusing the package if there are visible damages and making this reason clear to the driver. Contact us as soon as possible — and ideally within 48 hours — by emailing customercare@icecoldspice.com with your order number, photos of the item, and a description of the issue. All faulty items are assessed in conjunction with the manufacturer, whose findings will inform the resolution offered.

Faulty or incorrect items Please inspect the packaging and item carefully on delivery and report any visible damage before signing for the goods with the driver. We recommend refusing the package if there are visible damages and making this reason clear to the driver. Contact us as soon as possible — and ideally within 48 hours — by emailing customercare@icecoldspice.com with your order number, photos of the item, and a description of the issue. All faulty items are assessed in conjunction with the manufacturer, whose findings will inform the resolution offered.

For our complete returns policy please click here.

Your statutory rights are not affected.

Are you a trade professional or business customer? Unlock BIG trade benefits including a hidden discount on this product.

✓ Your own private trade discount code, valid for one year
✓ Preferential volume and repeat order rates
✓ Dedicated 1-to-1 WhatsApp support
✓ Bespoke product customisation
✓ Specialist product sourcing

→ Click Here to Unlock Your Free Trade Membership

Additional Information

01. DOWNLOAD PRODUCT DATA SHEET

Data Sheet

02. WHAT IS THE PURPOSE OF A BUFFER TANK IN A HEAT PUMP SYSTEM?

A buffer tank adds thermal mass and increases system water volume, helping to maintain stable flow rates through the heat pump. This reduces compressor short cycling, stabilises flow and return temperatures, and improves overall efficiency — particularly in zoned systems or low-load conditions.

03. HOW DO I DETERMINE THE CORRECT BUFFER TANK SIZE FOR MY HEAT PUMP?

Buffer tank sizing depends on heat pump output, control strategy, and system volume. A common design guideline is approximately 10–20 litres per kW of heat pump capacity, though requirements vary by manufacturer and system layout. Larger systems or highly zoned installations may benefit from increased buffer volume.

04. CAN COOL ENERGY BUFFER TANKS ACT AS LOW-LOSS HEADERS?

Yes. Cool Energy buffer tanks can function as combined buffer vessels and low-loss headers, providing hydraulic separation between the heat pump circuit and the heating distribution circuit. Multiple connection ports allow flexible pipework arrangements while maintaining stable flow through the heat pump.

05. WHEN IS A BUFFER TANK RECOMMENDED FOR HEAT PUMP INSTALLATIONS?

A buffer tank is recommended where the system water volume is insufficient, where multiple heating zones are controlled independently, or where mixed emitters such as radiators and underfloor heating are used. Many heat pump manufacturers require a buffer tank to meet flow and volume requirements and to protect warranty conditions.

06. WHO SHOULD INSTALL THE BUFFER TANK?

A Cool Energy buffer tank or low loss header should be installed by a qualified heating engineer with experience in heat pump systems. Where the buffer tank forms part of a heat pump installation, the overall system must be designed and commissioned by an MCS-certified installer to meet manufacturer requirements and maintain system warranty.

07. WHEN WILL I RECEIVE MY ORDER?

Please expect your delivery to arrive within 7 working days. You will receive email alerts once you've placed your order.

08. DELIVERY & RETURNS

Click to read our shipping policy and our returns policy.

We regularly check to ensure these are clear, fair, and in-line with the industry.

Call our friendly team for order support

020 3740 1246

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Fast & Free Delivery

Complimentary standard delivery to all UK mainland addresses. No minimum spend.

Finance Options

Securely pay with all major credit cards, or pay in 3 with PayPal.