{"id":1905,"date":"2025-05-19T20:48:13","date_gmt":"2025-05-19T20:48:13","guid":{"rendered":"https:\/\/kretz.cz\/produkt\/krbova-vlozka-z303v\/"},"modified":"2025-09-15T12:29:51","modified_gmt":"2025-09-15T12:29:51","slug":"krbova-vlozka-z303v","status":"publish","type":"product","link":"https:\/\/kretz.cz\/en\/product\/krbova-vlozka-z303v\/","title":{"rendered":"Fireplace insert Z303V"},"content":{"rendered":"<p>The KRETZ Z303V model is a hot-water fireplace insert with a cast-iron firebox, 6.7 kW water output, and 78% efficiency. The insert features a cooling loop, flat glazing, and allows for external air supply. It can heat spaces up to 414 m\u00b3, and its robust construction makes it suitable for more intensive use. 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