SH250 1LC Hideaway Low Profile Acoustic Box Fan EC 250mm

The Elta SH250-1LC is a 250mm Hideaway SH low profile acoustic box fan, built for ducted extract or supply where the ceiling void is too shallow for a standard box fan. It moves up to 1595 m³/h in free air, 1476 m³/h at 100 Pa and 518 m³/h at 350 Pa, the highest pressure in Elta's published table for this size.A single phase EC motor (220-240V 50/60Hz) drives a jet design double mixed flow impeller at up to 3200 rpm, drawing 178 W at best efficiency (1.31 A peak). An integrated commissioning control sets a single speed or a maximum speed, and the fan also accepts a potentiometer, 0-10V or PWM signal. The 1.2mm galvanised steel casing has a Class O fire rated acoustic lining and a removable lid, the motor is IPX4 with sealed for life bearings, and Elta give a 12 month warranty. 1 Phase EC Motor Up to 1595 m³/h Speed Controllable What it is best used forSupply or extract on 250mm duct for offices, libraries, meeting rooms, hotel public areas and apartment blocks where a full height box fan will not fit in the void. At 100 Pa it moves 1476 m³/h, roughly 6 air changes an hour in a space of about 250 m³.Elta publish no figures above 350 Pa, so for very high resistance systems the Singleflow SSDL box fan, with a published curve to 500 Pa, is the safer choice. It is not suitable for corrosive or explosive atmospheres, and air must stay between -20°C and +60°C.Why choose this over alternativesThe Hideaway is the low profile option, and at this size it also out-performs the Elta SSDL250-1EC Singleflow box fan for the same 250mm duct at normal duct pressures: 1476 against 1184 m³/h at 100 Pa and 1300 against 1022 m³/h at 200 Pa. The SSDL's advantages are a published curve to 500 Pa and lower breakout noise (37 against 40 dB(A) at 3m), so it suits very high resistance systems or fans sited above quiet rooms.If you need more air, the Elta SH315-1LC moves 2729 m³/h at 100 Pa. On a smaller duct the Elta SH200-1LC gives 864 m³/h at 100 Pa. Its specific fan power is 0.36 W/(L/s) at 100 Pa, which helps with Part L compliance.Installation notes Mount it at any angle, adequately supported, and leave access to the removable lid for cleaning and maintenance. The circular spigots take 250mm duct directly; secure each joint with an Elta 018-250-CLAMP fast clamp, and check the airflow direction arrow before fixing. The fan comes with a 1m flying lead. Wire to Elta diagram 152-554 and fit a local means of isolation as the wiring regulations require. Speed is set on the built-in commissioning potentiometer. To use an external potentiometer or a 0-10V signal, remove the jumper link and connect to ST1; the commissioning setting then caps the maximum speed. Site the discharge so exhaust cannot be drawn back into a room through the open flue of a gas or fuel burning appliance, and inspect the fan at least every 12 months. You'll also need Elta EC electronic controller 149-POT-10-MI (the potentiometer controller Elta list for every Hideaway SH) Elta fast clamps 018-250-CLAMP and backdraught damper 018-250-DAMPER available to order, ask us Elta panel filter 018-0250-FILT-P and heater battery 018-CV25-30-1M for supply duties available to order, ask us Browse more commercial box fans, inline duct fans or Elta fans, or call us for help choosing the right fan.Specifications Model SH250-1LC Type Low profile acoustic box fan Size 250mm circular spigots Max airflow 1595 m³/h Static pressure 350 Pa Motor Single phase EC, 220-240V 50/60Hz, 3200 rpm Power 178 W at best efficiency point (1.31 A peak) Noise 55 dB(A) inlet, 56 dB(A) outlet, 40 dB(A) breakout at 3m IP rating IPX4 motor Warranty 1 Year Manufacturer Airflow at 100 Pa 1476 m³/h Airflow at 200 Pa 1300 m³/h Airflow at 7.5V control signal 1379 m³/h free air, 1224 m³/h at 100 Pa, 51 dB(A) inlet Speed control Built-in commissioning potentiometer, 0-10V, PWM or external potentiometer input Overall efficiency 56.9% at best efficiency point SFP at 100 Pa 0.36 W/(L/s) Impeller Jet design double mixed flow, direct drive Casing 1.2mm galvanised steel, Class O acoustic lining, removable lid Operating temperature -20°C to +60°C, up to 95% RH Weight 9 kg Electrical connection 1m flying lead Wiring diagram 152-554 ErP Regulation (EU) 1253/2014, NRVU Manuals & Guides Elta Hideaway SH Datasheet Elta Hideaway SH Installation Guide