Fitting & Ventilation Requirements

Nowadays it is always important to ensure allentering a masonry or clay lined chimney. This is
regulations are followed when dealing with any fuelnormally achieved with the use of a metallic
burning appliances in the home. Failure to do this inregister plate. Failure to do this will result in great
some cases may have repercussions should youinefficiency of the woodburning stove and can
try to sell the house or dwelling in the future.lead to toxic fumes entering the living quarters.
Assuming there is an existing fireplace in theWhen fitting a traditional cast-iron multifuel stove
home with an existing masonry class 1 chimneyinto a fireplace opening lined with a NON
the fitting of a woodburning or multifuel stoveCOMBUSTABLE material most manufacturers
whether it is of traditional or a modernadvise a space of 150mm either side of the
contemporary design should not present anystove and a minimum of 50 mm clearance at the
great problems.back of the multifuel stove. Always consult the
It is always wise to consult a qualifiedmanufacturers fitting instruction manual on the
woodburning stove fitter such as a Hetasstove or seek advice from a registered fitter
engineer for the fitting of the woodburning stovebefore adjusting the fireplace opening for your
to ensure all regulations are met and the stove ismultifuel stove. Visit for further information.
fitted safely.When constructing the hearth to support the
In the case where a new woodburning or multifuelstove, the hearth must be made of
stove is to be fitted in the home with an internalnon-combustible material and should be 125 mm in
or external class 1 double insulated stainless steeldepth extending a minimum of 300mm from the
flue, consult your local building control departmentdoor of the stove and a minimum of 150mm
to ensure the fitter complies with all localeither side of the stove. Be careful with this one
regulations. In some areas building control mayas I have always recommended that the hearth
require an application for the work and issue aextends slightly more than the door when it is in
certificate after the fitting showing that the workthe fully opened position bearing in mind that most
has been carried out to the required standard.multifuel stoves now have a large single door. The
Always have your chimney smoke tested if it hasreason for this is purely for safety. Fine hot ash
been out of use for a long period of time andcan lies at the base of the door inside and may
have it properly cleaned by a registered chimneyfall when the door is opened. It is also safer for
sweep in your area. A proper smoke test isash removal from beneath the multifuel stove,
important for an old unused masonry or clay linedreducing the risk of hot embers falling onto a
chimney. As a rule of thumb always line unlinednon-combustible surface. It is always
masonry chimneys with a twinwall stainless steelrecommended to use an ash caddy when
flexible flue for solid fuel burning before fittingremoving ash, purchasable at your local hardware
your woodburning or multifuel stove. The flexiblestore.
flue is connected to a section of rigid enamelledAll woodburning or multifuel stoves require
pipe from the woodburning or multifuel stove withventilation to the outside world if the output is
a flue adapter. It is recommended in the case ofgreater than 5 kilowatts. Your approved hetas
a chimney already fitted with clay liners that thisinstaller can advise you on this or visit for more
is also lined as above if the cross section area ofinformation.
the clay liner is 20% greater than the crossMany contemporary/modern woodburning or
section area of the stove pipe from themultifuel stoves are now provided with a 120 mm
woodburning or multifuel stove. This ensures thatinlet at the base of the back of the stove for this
the stove does not draw more air into the firepurpose. It is a clever system as it means this is
chamber than is needed and results in bettercan be directly connected to the outside and the
control of the woodburning stove with betterair is then drawn directly into the base of the
combustion and hence higher efficiency. Alwayswoodburning stove when the fire is lit. This
ensure that the rigid fluepipe from themethod eliminates draughts in the room which can
woodburning stove is properly sealed whenbe felt with an indirect vent in the wall.