Midtherm 150mm Length Stainless Twin Wall Flue

The Midtherm HTS Twin Wall Flue – 150mm Length, available in black or stainless steel, is a durable and insulated flue component ideal for extending single-wall systems through walls or ceilings.

  • 5″ or 6″ diameters
  • Stainless steel chrome finish
  • Push fit connection (Comes with 1 band)
  • Suitable for solid fuel and gas/ oil

Built with premium stainless steel and a secure push-fit joint system, it offers exceptional safety, performance, and compatibility with various fuel types, backed by a 20-year warranty.

Trade professional? Contact us for bulk/ trade prices

Estimated Delivery: 3-5 Working Days

Please enquire for purchasing, pricing, delivery or installation

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With over 20 years’ experience, our in-house team can take care of everything from survey and design through to installation and aftercare.

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    • 14 day no-hassle returns
    • Full manufacturer warranty included
    • Family run since 2003
    • Installation by our in-house team Learn more →
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    • Dedicated aftercare & ongoing support

     

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    midtherm 150mm length stainless
    Midtherm 150mm Length Stainless Twin Wall Flue

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      Delivery, Click & Collect & Returns Information

      Collection Information

      We offer free Click & Collect on all orders from our Reading,
      Berkshire showroom and warehouse at RG7 2PQ.

      Please select “Click & Collect: Berkshire Showroom (RG7 2PQ)”
      at checkout to reserve your item for collection.

      If the Add to Basket button is not available, please call
      0118 970 1717
      or email
      info@bonfire.co.uk
      and our team can assist with placing your order.

      Please do not travel to collect your order until we have confirmed that your goods
      are ready. We recommend contacting us in advance to confirm stock availability,
      collection times and any loading requirements.

      Please ensure you arrive in a suitable vehicle for the size and weight of the goods
      being collected. Our team can assist with loading where safe and practical, but the
      customer is responsible for ensuring the goods are safely secured for transport.


      View our showroom information


      Delivery Information

      We offer a combination of standard parcel delivery and
      dedicated direct delivery, depending on the products ordered
      and your delivery location.

      Smaller products that are suitable for parcel delivery can be sent throughout our
      available UK delivery areas.

      Large, heavy or fragile products such as fireplaces, hearths, stone surrounds and
      larger fires normally require our dedicated delivery service.

      Delivery options and charges are calculated at checkout based on your
      postcode, order value and the products in your basket.

      Free Dedicated Delivery

      • Free dedicated delivery over £500 within 25 miles.
      • Free dedicated delivery over £1,000 from 25–50 miles.
      • Free dedicated delivery over £1,000 to London.
      • Free dedicated delivery over £1,000 from 50–100 miles.
      • Free dedicated delivery over £2,000 from 100–150 miles.
      • 150+ miles: tailored dedicated delivery quotation required.

      Free dedicated delivery applies to our standard
      one-person Essential Dedicated Delivery – Customer Unloads
      service unless stated otherwise.

      For locations over 150 miles away, we can often still arrange delivery.
      Please contact us for a tailored quotation. Depending on the order value and
      delivery requirements, we may be able to reduce or absorb part or all of the
      delivery cost.

      Standard Parcel Delivery

      Standard parcel delivery is available throughout our UK delivery areas on eligible products.

      This service is intended for smaller items such as selected accessories, spare parts,
      paints and other products suitable for a parcel carrier.

      If your order contains large, heavy or fragile products that are not suitable for parcel
      delivery, the parcel option will not be available and an appropriate dedicated delivery
      or tailored quotation will be required.

      Dedicated Delivery Service

      Where possible, we use a dedicated direct delivery service rather than
      a general pallet network for larger and more fragile products.

      This reduces unnecessary handling during transit and is particularly beneficial for
      fireplaces, hearths, natural stone, marble, slate and other fragile goods.

      Unless an upgraded delivery service has been specifically quoted and agreed, our standard
      dedicated service is a one-person delivery service and the customer is
      responsible for safely unloading the goods from the vehicle.

      What Our Free Dedicated Delivery Includes

      Unless otherwise agreed in writing, free dedicated delivery is normally made using a
      suitable small van or Sprinter-style vehicle.

      This means:

      • the goods are delivered to your address or the nearest safely accessible delivery point;
      • delivery is made by one driver;
      • the receiver is responsible for safely unloading the goods from the vehicle;
      • the driver may assist where safe and practical, but this cannot be guaranteed;
      • delivery does not include carrying goods into the property;
      • tail-lift delivery is not included;
      • two-person delivery is not included;
      • white-glove delivery is not included;
      • unpacking, internal placement and installation are not included.

      For heavy, bulky or fragile products, please make sure suitable unloading assistance
      is available when your delivery arrives.

      Tail-Lift, Two-Person & Bespoke Delivery

      Additional delivery services may be available at extra cost depending on the product,
      location and access requirements.

      Please contact us before dispatch if you require:

      • tail-lift delivery;
      • additional unloading assistance;
      • two-person delivery;
      • delivery onto a driveway or into a garage;
      • white-glove delivery;
      • internal placement;
      • restricted-access delivery;
      • timed delivery;
      • delivery to a building site or commercial address.

      Please call
      0118 970 1717
      or email
      info@bonfire.co.uk
      for a tailored quotation.

      Delivery Timescales

      For stock products, delivery may often be available within approximately
      2–3 working days, depending on the product, delivery method
      and vehicle availability.

      Some products will take longer, particularly where they are:

      • made to order;
      • bespoke;
      • supplier stocked;
      • awaiting manufacturer availability;
      • subject to a stated lead time.

      Once your order has been placed, we will keep you informed of the estimated delivery
      timeframe and advise you of any known delays.

      Please do not book installers, fitters or other tradespeople until your goods
      have been delivered and checked
      , as unexpected supplier or transport delays
      can occasionally occur.

      Access Requirements

      Please tell us before dispatch if there are any delivery access restrictions, including:

      • narrow lanes;
      • steep or gravel driveways;
      • low bridges;
      • parking restrictions;
      • steps;
      • restricted turning space;
      • weight restrictions;
      • controlled access;
      • difficult access for vans or lorries.

      The driver will deliver to the nearest safe and reasonably accessible point.

      For health, safety and insurance reasons, our standard delivery service does not include
      moving heavy goods inside your home unless an appropriate upgraded service has been
      specifically agreed in advance.

      Checking Goods on Delivery

      Please inspect your goods as soon as possible when they arrive.

      Where practical, check the condition of the goods while the driver is present and note
      any visible damage on the delivery documentation.

      If there is visible transport damage, please take photographs and notify us as soon as
      possible, ideally within 48 hours of delivery, so that we can investigate promptly.

      If you are unavailable at an agreed dedicated delivery time, a re-delivery charge may apply.

      Nothing in these delivery terms affects your statutory consumer rights.

      Delivery Coverage

      We currently sell and deliver within our available United Kingdom delivery areas only.

      We do not currently deliver to the Isle of Wight or addresses outside
      the United Kingdom.

      Dedicated delivery is available through our standard delivery zones up to approximately
      150 miles from our Reading showroom.

      For locations over 150 miles away, a tailored dedicated delivery quotation
      is required.

      Standard parcel delivery remains available throughout our UK delivery areas where the
      products ordered are eligible for parcel delivery.

      For delivery questions or a tailored quotation, please call
      0118 970 1717
      or email
      info@bonfire.co.uk.


      Learn more about our delivery information


      Returns & Exchange Information

      We offer a 14-day return period on eligible products where applicable.

      Return requests should be made within 14 days of receiving your order. Unless the goods
      are faulty, damaged or otherwise covered by your statutory rights, the customer is
      responsible for the cost of returning the goods.

      Returned goods should be unused, in their original condition and, where reasonably possible,
      in their original packaging.

      Non-Returnable & Special-Order Items

      Certain products may not be eligible for change-of-mind returns, including:

      • bespoke products;
      • made-to-order products;
      • personalised or specially manufactured items;
      • certain special-order products;
      • products that have been installed, used, altered or modified where a return is no longer possible.

      Specific return conditions may also apply to certain flue, chimney and other specialist components.

      Please check the product information and our full Returns & Exchange Policy before ordering
      if you are unsure.

      Any damaged goods should be reported to us as soon as possible, ideally within
      48 hours of delivery, together with photographs where available.
      This allows us to investigate transport damage promptly and does not affect your statutory rights.

      Where applicable and permitted under our returns policy, a
      restocking charge of up to 30% may apply to certain returned or exchanged
      products that need to be returned to a manufacturer or supplier.


      Learn more about our Returns & Exchange Policy

      The Midtherm HTS Twin Wall Flue – 150mm Length is a versatile and durable component designed to enhance your flue system’s efficiency and safety. Available in black or stainless steel finishes, this twin-wall pipe segment is expertly crafted to deliver reliable performance while complementing modern and traditional installations alike. Perfect for extending single-wall flue systems through walls or ceilings, it provides a seamless transition with an actual installed length of 102mm.

      Premium Design for Superior Performance

      Engineered for durability and functionality, this flue section features a high-temperature insulated design, ensuring consistent operation even under demanding conditions. With a 450°C operating temperature and a 4-hour fire rating, it guarantees safety and performance for wood-burning stoves, multifuel setups, gas, oil, biomass, and pellet appliances. The laser-welded seams and machine-formed joints provide a sleek, polished appearance while ensuring a secure and precise fit.

      The push-fit socket and spigot joint, paired with a locking band, simplifies installation, providing a quick and reliable connection every time. Each component is built with 0.5mm 316 2b stainless steel inner layers and 0.5mm 304 BA stainless steel outer layers, offering enhanced durability and resistance to corrosion.

      Versatility and Compliance

      Midtherm HTS Twin Wall flues are built to meet the highest safety and quality standards. The system is manufactured under ISO 9001-accredited quality management systems and holds CE certification. Additionally, Midtherm is a HETAS-registered manufacturer, reinforcing its reputation for producing trusted flue components.

      This pipe section is compatible with a variety of fuels, making it a versatile choice for a wide range of installations. Whether you’re working with wood, multifuel, or biomass heating systems, this product ensures consistent performance and peace of mind.

      Key Features:

      • Choice of Finish: Sleek black or classic stainless steel to suit your aesthetic needs.
      • High Durability: Constructed from premium stainless steel for long-lasting performance.
      • Insulated Design: Withstands up to 450°C operating temperatures with a 4-hour fire rating.
      • Effortless Installation: Push-fit socket and spigot joint system with locking band for secure and easy assembly.
      • Flexible Applications: Ideal for vertical or angled installations through walls or ceilings.
      • Certified Safety and Quality: Meets stringent standards, including ISO 9001, CE certification, and HETAS registration.

      20-Year Warranty for Peace of Mind

      Enjoy long-term reliability with a comprehensive 20-year warranty, available for registered and properly maintained HT-S installations. This robust warranty underscores Midtherm’s commitment to quality and customer satisfaction.

      The Midtherm HTS Twin Wall Flue – 150mm Length is the perfect blend of style, safety, and functionality. Whether you are extending a single-wall system or designing a new setup, this pipe section offers dependable performance, exceptional durability, and an attractive finish. Ensure the success of your flue installation with this premium component, backed by decades of expertise and rigorous quality control.

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      Additional information

      Brand

      Midtherm

      Colour

      Stainless Steel

      Country Of Origin

      United Kingdom

      Flue Diameter

      127mm (5"), 150mm (6")

      Fuel Type

      Gas, Multi Fuel

      Material

      Stainless Steel

      Warranty

      20 Years (if registered)

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