Harlequin Heatstream HS 150IN - 150 Litre Indirect

Harlequin Heatstream Harlequin Heatstream HS 150IN - 150 Litre Indirect

Product Description

Harlequin Heatstream HS 150IN - 150 Litre Indirect Hot Water System

A ground-breaking advancement in hot water storage, the product is a hybrid incorporating many of the advantages of Vented, Unvented and Thermal Store cylinders. 

The Indirect Heatstream comes complete with one top mounted 3kw Immersion Heater.

Produces mains pressurised hot water on demand. Safe, quick and easy installation. Low heat loss due to high levels of insulation. No pressure test certification required to install the system. System shape can fit neatly into many locations and through a standard door width. Non-corrosive polypropylene storage tank. Top positioned premium Boost Immersion for ultra fast heat up. 

 Benefits for the consumer

  • Mains pressurised Hot Water on demand
  • Amazing recovery rates due to its unique heat transfer method
  • Tough durable corrugated stainless steel coils ideal for most water quality areas

Benefits for the installer

  • Quick and simple to install with all water supply connections at the top
  • No expansion vessel or T&P relief valve needed
  • Simple overflow that can be terminated to waste pipe, soil stack or outside
  • Medium Density Polyethene exterior is highly resistant to damage from handling
  • Square shape and slim profile ensures that it fits easily into most applications


HS 150 Indirect  
Width: 520mm
Length: 520mm
Height + Fittings: 1,315mm
Empty Weight: 39kg
Filled Weight: 191kg
ErP Rating: B
Standing Heat Loss: 47W
Heat up time 60°C:(test start temperature 15°C.) 20mins
Heat up time 65°C:(test start temperature 15°C.) 25mins
Heat up time 70°C:(test start temperature 15°C.) 32mins
Outer Tank Polyethylene
Inner Tank Polypropylene
Internal Coils Stainless Steel
Immersion Heater 1x Top Mounted 3kw Immersion Heater
Hot Water Coil Inlet/Outlet Connections 22MM Pipe Tail
Coil 1  Inlet/Outlet Connections 22MM Compression
Overflow 3/4″F
Hot Water Coil Operating Pressure (max.) 3 bar
Coil 1 Operating Pressure (max.) 3 bar
Insulation, Sides & Bottom 60mm
Insulation, Top 120mm
Warranty 25 year tank body, 2 year internal components


Draw Off Volumes   
60°C Core Temperature 113L
65°C Core Temperature 128L
70°C Core Temperature 180L
15 litres per minute flowrate & usable hot water above 40°C .





Returns Information

Customers may return items within 14 calendar days (as per our Terms & Conditions) - refer to 4.6 & 4.7. **

Please be aware that returning a tank can be complicated and expensive so please check that you are ordering the correct item (we suggest checking the dimensions very carefully).

Delivery Information


The delivery of a tank can be confusing as each manufacturer offers a slightly different service and lead time. Please refer to our Delivery Information page.  Standard tank deliveries are "kerbside".


Most accessories will be delivered within 1-3 working days. If you require them quicker, we can on occasions offer a next day service (please contact us to discuss). If the item(s) are out of stock we will advise you of the expected lead time and you will of course have the opportunity to cancel with a full refund.


Product Code: HS150IN

Guarantee: 25 Year Guarantee

Write the first review

pdfHeatstream Brochure

pdfHeatstream Installation Manual

Lead Time: Standard Delivery 48 Hours

Item: HQ

£675.00 ex VAT
(£810.00 inc VAT)

up down
Delivery Options
  • Harlequin Heatstream 48 Hour DELIVERY if ordered before 11:00 to Mainland UK
    £40.00 (£48.00 inc VAT)

You can also...

print this page