Operating instructions
MS07-11 Issue 4b 18
Smoke Exempt Requirements
The eVolution 5 Wood burning stove has been tested by GASTEC under the PD6434
standard and has passed the emission requirements for exemption under the Clean Air
Act. Subsequently it has been exempt for use in smoke control areas when burning wood
only.
Smoke emissions from the appliance were measured over three main air control settings
representing high, medium and low outputs. The three output test conditions undertaken in
the present report were conducted with the air control (i) fully open – high output, (ii)
85% open – medium output and (iii) 70% open – low output
The low setting used was not the minimum setting for the control, the minimum air control
setting would give very poor smoke reduction since it was possible to starve the appliance
of air almost completely. A low setting that maintained clean combustion was determined
and used as the low output setting (70%).
There is a requirement for the door to be left ajar for 5 minutes immediately after refuelling.
This is to ensure that flames are wellestablished on the newly charged logs and that they
become fully blackened. Additionally, for medium and low output burning, the air control
must be maintained at 100% open for the first 5 minutes after refuelling at which time it is
possible to adjust to the required settings as identified above.
Ignition Sequence (Smoke Exempt Areas)
The procedure adopted for ignition is to build a bed in stages and to warm the body of the
appliance and the chimney as quickly as practicable.
Firstly kindling, weighing approximately 1 kg will need to be lit (using a chemical firelighter
is recommended) with the air control fully open. The door must be pushed against the
appliance but then left ajar.
After about 10 minutes, when the fire from the kindling is beginning to die back, two small
logs can be added. When these are alight and fully blackened, the door can be closed.
This, typically, takes approximately a further five minutes.
When the fire is again beginning to die back, a full load of two logs, weighing about 1.3
1.4 kg, can be added: typically this takes 20 – 25 minutes from the start of the ignition
sequence. The air control must be maintained in its fully open position for the remainder of
the ignition sequence. Once the fuel has blackened the fire can then be allowed to burn
down to a suitable condition at a preferable air slider position. For start of further re fuelling
apply sequence in the previous 2 sentences.