As expected, Garath McCleary and Tyler Blackett were out with bans allowing Jordan Obita and Callum Harriott to slot into the starting XI that also featured Joey Van Den Berg.
Dominating possession, the Royals had a good grip on the game early on but it took 21 minutes for either side to get a shot off, although it was almost worth the wait as John Swift smashed the post from distance.
Given a cracking boost midway through the half, Reading capitalised on Rajiv Van La Parra's dismissal, the second yellow card coming for dissent, when Beerens finished off Harriott's cross, ably assisted by a deflection.
Mark Hudson missed a great chance to level matters but the hosts had the lead going into the second period, bringing on Tennai Watson for the booked Jordan Obita during the break.
Huddersfield got back into proceedings with a bout of pressure after the hour mark and a couple of close calls in stoppage time, but Reading held on to rise to fourth in the Championship table, curiously on zero goal difference.
Brentford's up next on Tuesday night, and we'll have full report and ratings from that, and of course today's game, in due course.