Heat transfer between a uniformly heated flat plate and an impinging circular air jet was investigated experimentally to determine the values of the local and average Nusselt numbers, particularly for small values of Reynolds number and jet spacing. A heat transfer correlation was developed, which extends the existing database to Reynolds number and jet spacing values as low as 6000 and one jet diameter, respectively. Experimental results provided useful information of interest to potential industrial applications regarding the radius of the heat transfer area and jet spacing for maximizing the average Nusselt number.