Always verify the unit's rating plate for the correct drill size

Since this model has no enclosure

What are the physical pipe connection sizes

Is this a universal flame rod

Can I use this for non-York VFD installations

Laars Heating Systems RE2334700 Pressure Switch 321042-401 Always verify the unit's ratingThe Laars RE2334700 Air Pressure Switch is a critical safety component engineered specifically for the Laars NeoTherm boiler series, including models NTH 150 through NTH 850. As a veteran grade HVAC replacement part, this switch monitors the differential pressure within the combustion chamber, ensuring that the inducer fan is moving sufficient air for safe combustion. If the boiler pressure switch detects a blocked vent, intake obstruction, or fan