Running two appliances on one chimney sounds convenient, but the calculation is demanding. The second appliance adds exhaust mass flow, changes the temperature profile, and affects the available draught for both devices. Whether the setup works depends on the cross-section, height, connection positions, and the performance data of both appliances.
DruckZugPro calculates the multi-appliance configuration per DIN EN 13384-2 and shows whether the chimney can handle both.
Highlights
- Calculation per DIN EN 13384-2 for two appliances sharing one flue.
- Both connection positions and their height difference are accounted for.
- Result shows the operating state of each device individually and during simultaneous use.
How it works
- Enter the first appliance (from the database or manually).
- Add the second appliance with its connection position on the chimney.
- Describe the chimney (total height, cross-section, material).
- DruckZugPro checks all operating combinations: appliance 1 only, appliance 2 only, both running.
FAQ
What combinations are typical?
Common examples: a wood stove in the living room and a tiled stove or kitchen range on the ground floor sharing the same flue. Or a wood stove alongside the existing central heating (if the chimney is rated for it).
Is there a maximum total output?
No blanket limit, but the chimney must handle the combined exhaust flow. The cross-section is decisive: too narrow and the resistance rises enough that one or both appliances lose adequate draught.
Can I connect a wood stove and a gas appliance to the same chimney?
Typically not. German building regulations require separate flues for gas and solid-fuel appliances. DruckZugPro calculates the fluid dynamics, but the regulatory approval must be checked separately.