This is the 17105th most frequent Polish word.
węglową
The Polish word "węglową" means "carbon" or "coal-related" in English, depending on context.
In the sentence, 'węglowej' is an adjective in the locative case, describing the type of stove used for cooking.
Gotujemy na kuchni węglowej.
We cook on a coal stove.
'węglowa' here modifies 'piec' and is in its nominative form, indicating the furnace's association with coal as its fuel.
W kuchni stała piec węglowa.
In the kitchen stood a coal furnace.
'Ogrzewanie węglowe' uses 'węglowe' as an adjective in the nominative case, describing the type of heating that was used.