Yes, a kitchen chimney can be installed even if there is no provision for ducting. There are two main types of kitchen chimneys: ducted (vented) and ductless (recirculating).
Ducted (Vented) Chimney: A ducted chimney is designed to expel the cooking fumes, smoke, and odors outside the kitchen through a duct system that connects the chimney to an external vent. This type of installation is considered more effective in removing pollutants from the kitchen as it directly vents them outdoors. However, installing a ducted chimney requires a ducting provision to be present, which may involve cutting holes in walls or ceilings to accommodate the ducts.
Ductless (Recirculating) Chimney: A ductless chimney, on the other hand, does not require any external ducting. Instead, it uses filters to trap cooking fumes and smoke and then recirculates the filtered air back into the kitchen. These filters help remove grease and odors, but they may not be as effective in removing all pollutants as the ducted option. Ductless chimneys are generally easier to install since they don't require ductwork.
If there is no provision for ducting in your kitchen, you can opt for a ductless kitchen chimney. However, it's essential to choose a high-quality chimney with efficient filters to ensure it effectively removes the impurities from the air in your kitchen. Regular maintenance and cleaning of the filters are also important to maintain the chimney's effectiveness over time.