If you are thinking of getting a stove/heater or want an existing appliance checked or sorted then contact me.
I can provide competitive estimates for stoves and chimney liners. I am a HETAS registered installer for dry stoves, i.e. those are not connected to the water system and that do not have a back-boiler.
You may want your exisiting appliance re-connected safely or the flue re-lined; in either case please do not hesitate to contact me.
I will always look to use the best quality materials available, cheap as chips equipment doesn't stand the test of time, it's false economy in my opinion. I would always recommend the highest quality liner you can get as not only do these have better corrosion resistance, but also a much longer warranty period.
The difference between the grades of stainless steel used in flexible chimney liners is primarily corrossion resistance. 316 is less resistant to sulphuric acid than 904 steel; given that flexible chimney liners are composed of two thin layers of steel - one corrugated on the outside and one flat spiral on the inside - with a combined thickness of 0.5mm or less!
A chimney operates on the principle of having a natural up draught. One factor in creating the up draught is maintaining a warm flue gas temperature, of between 150°C and 450°C. Burning wood or multi fuel slowly with insufficient air supply, particularly on stoves or closed appliances must be avoided. Low flue gas temperatures will cause condensation and greatly increases the risk of producing excessive tar and corrosive soot deposits. This is a common problem, particularly when burning wet wood or coal and should be avoided. If soot and condensate deposits are allowed to accumulate in a flue, the deposits can ignite causing a chimney fire. These deposits can also be very corrosive and if they are not regularly removed can cause corrosion of the metal parts of both the chimney and the appliance.
Warmth - If a chimney stays warm throughout it's length then it stays dry, if the flue gasses drop below 100ºC then condensation will occur and with it residues. If the flue is lined with soot, then this condensation will cause an acidic environment. The best way to keep a flue warm is to insulate it and...
Watertightness - If rain runs down the inside of a nice warm flue, then it will quickly evaporate; however, if the flue gasses cool below 100ºC then the rain will cool the flue further and run further and further down the flue, cooling it as it goes; again leading to the creation of an acidic environment! This also applies to the outside of the liner, which will probably be in a used chimney flue of some sort, even if the chimney has been thoroughly swept there will still be some rediue on the walls of the chimney. If condensation and water are allowed into this space it will adhere to the outside of the liner corroding it from the outside (beware of liners that do not have the same grade steel on the outside skin as the inner skin).
Rigid Twin-Wall Insulated systems
A factory-fabricated, insulated ,stainless-steel systems that can be used where no chimney exists.