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Which chimney to choice...

- Chimney types

We are offering to choice from few manufacturers products: ceramic chimney system - MK KOLEKT, stainless steel chimney system - SAURESTA, condensing gas boilers exhaust system - Almeva. A short comparison of each system is given below (table 1).

Table 1.
Ceramic chimneys - MK KOLEKT
MK KOLEKT
Fuel Type

Coal

Wood

Gas

Pellets
Heating technology

Standard

Condensing
Pressure

--

Negative
Other features
<600oC
G50
GERMAN ceramic
Ceramic (modular) chimney system for all fuel types
Condensing flue system - almeva
STARR
FLEX
LIK
Fuel Type

--

--

Gas

--

--

--

Gas

--

--

--

Gas

--
Heating technology

--

Condensing

--

Condensing

--

Condensing
Pressure

Positive*

Negative*

Positive*

Negative*

Positive*

Negative*
Other features
<120oC
<120oC
<120oC
O20
O20
O20
Swiss elements
*Almeva chimney system pressure mode depends on the diameter of the system (≤d160 - negative; >d160 - positive).
Stainless steel flue system and chimney liners
SR-1
SR-2
SR-3
Fuel Type

Coal

Wood

Gas

Pellets

Coal

Wood

Gas

Pellets

Coal

Wood

Gas

Pellets
Heating technology

Standard

Condensing

Standard

Condensing

Standard

Condensing
Pressure

--

Negative

--

Negative

--

Negative
Other features
<600oC
<600oC
<600oC
Ø100-300mm: G130
Ø350-450mm: G195
Ø550-600mm: G260
G
G
LITHUANIAN elements
Stainless steel chimneys and flue liners


- Chimney height

The chimney height should be high enough above the roof, to ensure the continuous draft. Chimney height significantly affects the strength of the furnace draft. Too low chimney and strong wind could lead to too weak draft, which wouldn't be enough to ensure full combustion gases removal. It is recommended to build chimney as close to the roof ridge.
If chimney is going to be built next to the building element, which is like barrier, then system should be built as shown in the picture A. The chimney height above roof parapet or ridge should be not less than 0.3 m, if roof surface is nonflammable, not less than 0.6 m - flammable. If roof is flat or roof angle is less than 12°, regardless of roof construction, chimney outlet must be at least 0.6 m above ridge. If chimney is going to be built at distance 1.5-3 m from ridge, then chimney outlet must be not lower then ridge height. If chimney is going to be built at distance 3-10 m from ridge, chimney outlet must be above imaginary line, drawn from horizontal line at 12° angle.

Image A:
How to choice chimney - chimney height

When the roof inclination angle is more then 12° and roof surface is flammable, chimney outlet must be built at least 0.6 m above ridge, as it's shown at image B. If roof surface is flammable, do not forget to install spark arrestor, usually it is metal mesh with openings no larger than 5x5 mm. If roof inclination angle is more then 12° and roof surface is nonflammable, chimney outlet must be built at least 0.3 m above roof and at least 1 m distance from ridge, as it's shown on picture C.

Image B:
Image C:

The height of the chimney above the roof surface:
1) Is roof flammable? Yes No
2) Roof angle °
3) Distance between chimney and barrier m
Chimney height above the roof should be m.

If You are unsure or You need advice, just contact us, so we could help.

   
  

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