Profile: Gerand Engineering Co. specializes in offering products for hydronic balancing in the HVAC industry. Our products include venturis, indicators (orifice type) & balvalve-venturis (one-piece unit, fixed venturi and valve) and meters used to balance the hydronic & air systems. Our venturis and indicators are furnished with a set of meter fittings (nipples, valves & quick disconnects)and bal valve-venturis have nipples and quick disconnects.