
Construction
Parts and materials
The coaxial chimney is used to discharge the combustion products from a gas boiler with a closed combustion chamber, as well as for the intake of air necessary to maintain the combustion process. The combustion products are removed through the inner pipe with a smaller diameter. Fresh air is supplied by the outer pipe - it enters through the free space between the pipes.
Overall and installation dimensions of the coaxial chimney set DNOVA 1-60/100-650 antifrost
| Model | D1, D6, D9 | D2, D4 | D3, D7, D10 | D5, D8, D11 | L | L2 |
|
1-60/100-650 (antifrost) |
60 | 100 | 60.3 | 100.5 | 650±3 | 300 |

Sketch of coaxial chimney kit DNOVA 1-60/100-650 antifrost
Production. Usually 7–14 business days after you approve the quotation and pay. Made-to-specification items are confirmed in the quotation.
Freight. Not charged at checkout. A manager quotes air and sea freight to your port or airport, and nothing ships until you approve the price and the freight.
To North America. From approval and payment to the destination port or airport: air 14–24 days, sea 32–60 days. Estimates, not guarantees.
Terms. EXW Ningbo or FOB Ningbo Port; CIF on request. The agreed term is written on the Proforma Invoice.