Can I use a 3-blade substitute if this 2-blade model is out of stock

This is an SPST (Single Pole Single Throw) fixed-temperature control

including the Lochinvar KB150

You must always match the OEM temperature rating (175

and large-scale pool heating systems

National Comfort Products 14208327 Ventor Tube Assembly 318172-701 Can I use a 3-bladeThe National Comfort Products 14208327 Ventor Tube Assembly is a critical OEM component designed specifically for the Comfort Pack (CPG) gas heating series. As a veteran grade replacement part, this assembly ensures the precise delivery of combustion air and the efficient evacuation of flue gases within the furnace's sealed combustion system. Engineered for thru the wall HVAC systems, the 14208327 is built to withstand the thermal stress and corrosive