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Telford Tempest Unvented  Twin Coil Cylinder (PLUS)

From £899.65 inc. VAT

  • Lifetime guarantee
  • 2 years guarantee on components
  • 90-500litre domestic range
  • High density insulation
  • Full unvented kit supplied, including remote expansion vessel
  • WRAS approved
  • Treated to protect against corrosion
SKU: TSMIS-PLUS Categories: , Tags: ,


Telford Tempest Unvented  Twin Coil Cylinder (PLUS)

Product Code: TSMIS/Plus

The Telford Tempest Unvented Twin Coil Cylinder (PLUS) is a high-quality, durable, and long-lasting hot water cylinder that uses two coils to heat water. Made from premium grade Duplex stainless-steel, the Tempest is resistant to corrosion and will provide years of reliable service.

Here are some of the things that make the Telford Tempest Unvented Twin Coil Cylinder (PLUS) stand out from the competition:

  • Premium grade Duplex stainless-steel: The Tempest is made from premium grade Duplex stainless-steel, which is up to 40% thicker than some of the lower grade stainless-steel used by other manufacturers. This makes the Tempest more resistant to corrosion and ensures that it will last for many years.
  • Lifetime warranty: Telford is so confident in the quality of their products that they offer a lifetime warranty on the Tempest. This means that you can be sure that your investment is protected.
  • Twin coil design: The Tempest has a twin coil design that allows it to be heated by two sources of energy, such as a boiler and solar panels. This means that you can save money on your energy bills and reduce your carbon footprint.
  • Slimline design: The Tempest has a slimline design that takes up less space than traditional hot water cylinders. This makes it ideal for smaller homes or for homes where space is limited.
  • High-density insulation: The Tempest is insulated with a high-density insulation that keeps your hot water hot for longer. This means that you’ll use less energy on your heating bills.
  • Full unvented kit supplied: The Tempest comes with a full unvented kit supplied, including a remote expansion vessel. This means that you can install the Tempest quickly and easily without having to purchase any additional parts.
  • WRAS approved: The Tempest is WRAS approved, which means that it meets the highest standards of safety and quality.
  • Treated to protect against corrosion: The Tempest is treated to protect against corrosion, which further extends its lifespan.

If you’re looking for a top-quality, unvented hot water cylinder that uses two coils to heat water, the Telford Tempest Twin Coil is the perfect choice. Order yours today and enjoy peace of mind for years to come.


Features & Benefits

Here are some of the features and benefits of the Telford Tempest Unvented Twin Coil Cylinder (PLUS):

  • 316L grade stainless-steel 22mm compression fittings and coils
  • Supplies mains pressure hot water and high flow rates
  • Fast reheat
  • Factory-fitted temperature and pressure relief value set at 7 bar / 90°C
  • Remote expansion vessel with factory-fitted wall mounting bracket
  • Full unvented kit supplied
  • Highly efficient
  • Fully insulated to minimise any heat loss
  • ErP rated A – capacities from 90-200 litres (250-300 litres ErP rated B)
  • Factory-fitted 3kW immersion heater
  • Available in 90–300 litre capacities


Product Fiche

Product Code Description Capacity (Litres) Height (mm) Diameter (mm) Standing Loss (Watts)  ERP Rating
TSMI090/PLUS Indirect Plus 90 1050 580 32 A
TSMI125/PLUS Indirect Plus 125 1200 580 36 A
TSMI150/PLUS Indirect Plus 150 1350 580 38 A
TSMI170/PLUS Indirect Plus 170 1650 580 40 A
TSMI200/PLUS Indirect Plus 200 1950 580 42 A
TSMI250/PLUS Indirect Plus 250 1950 660 56 B
TSMI300/PLUS Indirect Plus 300 2150 660 70 B



Downloads:   Tempest Indirect Plus Technical Data  – Installation Guide

More information available on Telford’s website


Additional information

Weight N/A
Dimensions N/A

170L, 200L, 250L, 300L




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