Thermal Storage & PulsaCoil Hot water Cylinders

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Thermal Storage & PulsaCoil Hot water Cylinders

Gledhill PulsaCoil and Thermal Store Cylinders: Comprehensive Overview and Expert Analysis


The Gledhill PulsaCoil and thermal store cylinders are popular choices for homeowners seeking efficient and reliable hot water systems. This guide provides a detailed analysis of the pros and cons of both systems, equipping you with the information needed to make an informed decision. We delve into the technical aspects, performance metrics, and user feedback to help you understand whether a PulsaCoil or thermal store system is the right fit for your home.

Gledhill PulsaCoil Hot Water Cylinder Utilizing Off-Peak Electricity

Efficient Hot Water Supply Gledhill, supplied by the renowned, a cylinder specialist, has introduced the latest PulsaCoil Stainless range online. This thermal storage cylinder is composed of high corrosion-resistant stainless steel that generates mains pressure hot water by utilizing off-peak electric power. It is specifically designed for installation in homes and apartments without any loft space or ceiling storage.

Innovative Design The PulsaCoil Stainless is an open-vented thermal store that eliminates the need for a pressure and temperature relief valve, and hence any discharge pipework. This feature complies with Part G Building Regulations, which prohibit the connection of an unvented cylinder's discharge pipe to a soil stack.

The thermal store's innovative design employs a highly efficient plate heat exchanger to generate domestic hot water. When hot water is required, mains cold water is instantaneously heated as it passes through the heat exchanger and is then delivered to the taps. As a result, there is no risk of Legionella contamination. This design also makes installation and ongoing maintenance easy for installers.

Additional Advantages The PulsaCoil Stainless has several advantages:

  • No Scaling: The immersion elements remain in the same primary water at all times, preventing scaling even in hard water areas.
  • Cost Efficiency: By utilizing off-peak electricity, the cylinder keeps running costs for homeowners to a minimum.
  • Low Maintenance: Unlike an unvented cylinder, PulsaCoil Stainless thermal stores do not require any annual maintenance.
  • Enhanced Aesthetics: The product comes with a circular feed and expansion tank with a reduced height compared to the previous rectangular option.
  • Full Insulation: Covers pipework and the plate heat exchanger.
  • No Discharge Pipework: Eliminates the need for discharge pipework.
  • Optional Secondary Heat Source: There is an option to use a secondary heat source.
  • No G3 Qualification Required: Installation does not require a G3 qualification.

Pros of Gledhill PulsaCoil and Thermal Store Cylinders

1. Efficient Hot Water Supply

  • Mains Pressure Hot Water: Both PulsaCoil and thermal store cylinders deliver hot water at mains pressure, ensuring strong and consistent flow rates, which is ideal for households with high water pressure needs.
  • Energy Efficiency: Designed to utilize off-peak electricity tariffs, these systems heat water efficiently, leading to significant cost savings on energy bills.

2. Versatility in Fuel Sources (Thermal Store)

  • Multiple Fuel Sources: Thermal store cylinders can use different fuel sources, including wood, solar, and gas boilers. This versatility allows for a more sustainable and cost-effective energy solution.
  • Heat Source Combination: Combining different heat sources maximizes the potential of thermal store systems, making them perfect for off-grid properties with multiple heat sources.

3. Durability and Construction

  • Stainless Steel Build (PulsaCoil): The newer PulsaCoil models are constructed from high-quality stainless steel, which is highly resistant to corrosion, ensuring a long lifespan and reducing the need for frequent replacements.
  • Minimal Maintenance: Both systems require minimal maintenance, further reducing long-term costs.

Cons of Gledhill PulsaCoil and Thermal Store Cylinders

1. High Initial Cost

  • Upfront Investment: The initial purchase and installation cost of these systems can be high. This includes the cost of the unit itself and professional installation fees.

2. Complexity of Maintenance

  • Technical Repairs: Older models, such as the PulsaCoil 3, may encounter issues like relay burns and immersion element failures. These repairs can be complex and often require professional assistance.

3. Potential Inconsistencies

  • Hot Water Flow Issues: Some users report inconsistent hot water flow, particularly with older models. Ensuring proper installation and regular maintenance can help mitigate these issues.

Technical Specifications and Performance Metrics

1. Heat Retention

  • Advanced Insulation: Both PulsaCoil and thermal store systems are equipped with high-grade insulation, minimizing heat loss and maintaining water temperature for extended periods.

2. Heating Efficiency

  • Quick Recovery Rates: These systems are designed to heat water quickly and efficiently, making them suitable for households with high hot water demand.

3. Capacity Options

  • Various Models Available: PulsaCoil and thermal store systems come in different capacities to suit various household sizes and hot water usage patterns. From smaller units suitable for apartments to larger systems for family homes, there's a model for every need.

User Feedback and Real-World Performance

1. Positive Experiences

  • High Satisfaction Rates: Many users express satisfaction with the consistent hot water supply and energy savings achieved with these systems.
  • Long-Lasting Performance: The durability of stainless steel construction in PulsaCoil models is frequently highlighted in user reviews, with many praising the long-term reliability of the units.

2. Common Concerns

  • Installation Challenges: Some users mention the complexity of installation, emphasizing the importance of professional setup to ensure optimal performance.
  • Repair Costs: While these systems are generally reliable, repair costs for older models can be high, especially if specific components need replacement.


The Gledhill PulsaCoil and thermal store cylinders are robust and efficient hot water systems that offer significant benefits, particularly in terms of energy savings and durability. However, they also come with some drawbacks, such as high initial costs and potential maintenance complexities. By weighing these pros and cons, homeowners can make an informed decision about which system is the best choice for their needs.

Additional Resources

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By thoroughly understanding the features, benefits, and potential drawbacks of Gledhill PulsaCoil and thermal store systems, you can ensure that you choose the most suitable hot water solution for your home.

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