VEVOR Propane Tankless Water Heater, 4.3Gal Indoor 100000 BTU Instant Hot Water Heater, Smart Temperature Control & Clear LED Display & Multiple Security Protections for Whole House, Silver Gray
Are the water inlet, outlet, and gas inlet really all 1/2 inch NPT? In some of the pictures the water inlet and outlet look more like garden hose thread than NPT. I'd like to confirm so I can gather the correct installation parts.
No, this indoor propane tankless water heater cannot be vented into a regular existing chimney. It must be connected to a dedicated direct vent system for exhaust.