6KX Gas Fireplace Type_Test Strips Made of heavy-duty powder-coated steel

Made of heavy-duty powder-coated steel

Stabilized means the chlorine has cyanuric acid built in to protect it from being burned off by UV sunlight

so square footage alone won't tell you which you need

1 x DuraVent 3PVP-F6 PelletVent Flashing - 3"

6KX Gas Fireplace Type_Test Strips Made of heavy-duty powder-coated steelOverview The 6K 8K Series, the best selling gas fireplace in its category, brings back beautiful moments with the look and feel of a traditional fire. An expansive view, trend forward design choices, voice control and heat management create a luxury experience you can enjoy year round. Quick Specs BTUs: Up to 40,000 Input Viewing Area: (H) 24 3 4 in. x (W) 34 1 4 in. Natural Gas BTU 22,000 40,000 Input Width 41 in. Height 40 7 8 in. Depth 21 7 16 in.