Door and Oven Glass.

Each stove has a fitted pane of clear ceramic glass to allow you to see the fire. Depending on your stove model the size of the ceramic glass will vary. The cooker models will have an additional pane of ceramic glass.

Ceramic glass is a service item, if it becomes damaged replacement pieces are available.

For more information look at our Spare Part page.

Looking into a penguin’s souls

Maintenance

The ceramic glass that Chilli Penguin has been using since August 2016 has a highly polished surface with an anti corrosion, silica coating. We recommend the following cleaning methods. Always when the glass is cold

  1. Regularly removing any deposits that have built up on the stove glass. We love a clear view of the fire, so we tend to wipe ours over daily, before we light each fire.
  2. Use water and a non abrasive cloth or an alcohol based stove glass cleaning solution
  3.  We do not recommend alkalis, like bleach, oven cleaner or caustic soda for cleaning this type of stove glass.

If you have an older piece of glass, (before August 2016) the surface was not polished. (If you are not sure, use the above method). We recommend the following cleaning methods for this type of ceramic glass. Always when the glass is cold.

  1. Make a paste from wood ash. This can be as simple as getting a damp rag or piece of kitchen towel, dipping it in the wood ash and then using it to clean the glass.
  2. Use a dry wipe, stove-glass cleaning pad.
  3. Use a proprietary stove glass cleaner.

Do not use abrasive materials, as this can scratch the glass and cause damage.

Keeping Your Stove Glass Clear

To maintain clear glass there are 2 principles: correct and dry fuel and the proper use of the air controls. While no stove glass will stay perfectly clear at all times these simple principles will make a huge difference.

As a general rule the hotter the fire the clearer the glass will be. If you have wet fuel the fire will struggle to reach high temperatures. If not enough air is being drawn into the firebox due to incorrect use of the air controls, the fire will slumber and not burn as well or efficiently.

However there are times both within the burn cycle and areas within the physical firebox where the temperatures are cooler. As far as the burn cycle you can just wait for a hotter fire and discolouration will burn off. Cooler spots in the firebox, such as the corner of the glass can show some discolouration after a number of fires. This is easily removed, see the maintenance section.

Replacing broken glass

You can order replacement glass through us or your local stockist. You just need the model name. If you bought your stove in 2012 or earlier then glass dimensions are helpful also.

Glass is relatively easy to replace. There are two types of glazing, single and double, depending on the model. We usually take off the door to do this. Rest it on surface that will protect the handle.

Single. The glass is held in place with clips. Remove the clips, position the replacement glass, tighten the screws just enough to pinch the glass. Over tightening can cause the glass to crack. Check that the glass seal (the flat rope 2mm x 10mm, between the glass and stove body) is intact. If worn that can be replaced at the same time.

Double. The glass is held in place with retaining channels and screws. Remove the screws and the channels, position the replacement glass, ensure the between-glass-seals are in place, re-fit retaining channels and tighten screws just enough to pinch the glass. Over tightening can cause the glass to crack

"Crazing"in Glass Ceramic Materials

This is a very unusual occurrence but we have included some information that may be helpful.

During the combustion process, fossil fuels produce combustion by-products. These vary both in their composition and concentration, and are heavily dependent on the composition of the fuel being used, and the burn conditions within the appliance.

One of the most reactive combustion by-products found is sulphur. Under certain very specific conditions, it is possible to set up a combustion environment where a chemical reaction occurs between the glass ceramic and sulphurous deposits, which attach themselves to the glass surface, can take place. The glass that we have been using since August 2016 has an anti corrosion, silica coating, this in engineered to reduce this effect.

Initially, this may manifest itself only as a series of white deposits on the glass (which can be cleaned off with ease). However, if these deposits are left on the glass surface over a prolonged time period and subjected to repeated thermal cycling in non-ideal burn conditions, micro cracking can occur. This gets worse over time, until it becomes noticeable. This effect is known as “crazing”.

However, the necessary combination of effects required for this phenomenon to arise in the first place, makes this a very rare condition.

Factors to be considered for minimising “crazing” in glass ceramic windows:

  • Minimise the use of high sulphur content fuels
  • Ensure glass ceramic windows are regularly cleaned using methods discussed previously and any residues are completely removed prior to use.