Celsius – Volcanic Pumice Defra Exempt Stove Package

Our Celsius system is a perfect solution for a modern fireplace insert, generating warmth and comfort, as well as style. It comes in a portrait frame with a highly insulating surround, formed from volcanic pumice sourced direct from the Hekla Volcano in Iceland.


Our innovative and advanced clean wood burning technology provides an eco-friendly and pleasant warmth. Log burning stoves achieve up to 84 % energy-efficiency – delivering more heat with less wood and are far more likely to heat larger rooms more efficiently than traditional radiators.

The insert stove comes with 2 convection grills to get the best possible distribution of heat. The grills are available in black or white. The fresh air supply to the Celsius insert is integrated within the chimney system. Celsius has a standard height of 1500 mm, but since the frame and chimney have the same dimensions, the height can easily be changed with additional chimney modules.

Being formed from volcanic pumice, the Celsius system is simple and lightweight giving you clean lines and the smallest possible footprint to construct, and can be placed with 0 mm distance to combustible material from the back, and with only 300 mm from the sides.

clearSkies Level 5 for Sirius and Celsius

clearSkies certified appliances meet the minimum performance level for Ecodesign (which is the minimum legal requirement for an appliance manufactured in the UK from 1st January 2022). These new Ecodesign Regulations represent a significant tightening of criteria over the current CE requirements and specify the minimum energy efficiency of the appliance and the maximum levels of emissions permitted which are:

  • CO – Carbon Dioxide
  • PM – Particulate Matter
  • OGC – Organic Gaseous Compounds
  • NOx – Nitrogen Oxide

Both Sirius and Celsius achieve clearSkies Level 5, which is a 30% improvement on Ecodesign stove models and all Schiedel models are DEFRA Approved for use in Smoke Control Areas.

The natural qualities of volcanic pumice

Pumice is a natural insulator. This is the unique property that separates pumice from all other chimney materials. The insulating properties of Pumice allow the flue gases in the chimney to quickly reach their optimum temperature enabling the heating appliance to reach its optimum performance shortly after lighting.

It also keeps the chimney warmer longer as the heat output of the appliance decreases – once again aiding performance and reducing the likelihood of condensation and soot build-up.

Resistant to temperature change
Pumice has very little expansion and contraction with temperature change. This reduces the possibility of cracking and structural damage that can occur with other products.

High insulation properties
Pumice is a natural insulator, able to maintain the temperature of flue gases when other products have allowed the temperature to fall below the dew point.

Pumice is strong yet lightweight allowing one person to lift and build the chimney units.


Technical characteristics CELSIUS
Width 440 mm
Height 1500 mm
Depth 440 mm
Output 6.7 kW
Efficiency A+
Energy Efficiency 83 %
Weight 240 kg
Air Independent YES
  • Danish Technological Institute DS/EN13240/A2:2004
  • Norweigan Standard NS3058 and NS3059 (PM Measurement)
  • European Standard EN16510-1:2018

AR Chimney Builder For Stoves.

Download our amazing Augmented Reality App, which lets you see how a stove looks like in a room and can calculate the ICID components and costs. Click here for more details

Money back for installers from Schiedel

Whenever you register an installation with our easy to use, online guarantee registration portal, you will now accrue points based on the number of installations and installation type.

Once you have reached a minimum of 25 points, you can begin to redeem them for £25 Love2Shop vouchers.

So start to register your installations, taking full advantage of our Lifetime Guarantee on Flex and ICID, as well as guarantees on all our other ranges, and to commence earning points 🙂

Click here for more details.

Isokern Pumice Double Module DM is CE Certified to EN1858 TÜV Cert no. 0036 CPR 90219 001

Isokern Pumice Chimney Liner is CE certified to EN1857 TÜV Cert no. 0036 CPR 90219 002

Isokern Magnum Firechest has been tested at the Fraunhofer Institut, Stuttgart, Cert no. P8-094/2006

CE Designation

  • Double Module DM System Chimney* T450 N1 D 3 G(00)
  • Pumice Chimney Liner T450 N2 D 3 G

* Zero distance to combustibles on straight chimney systems with ventilated terminal.
38mm distance to combustibles on offset systems. and non-ventilated systems.

Photos and images.

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