Supply and exhaust dampers are closed automatically while the unit is off to prevent drafts.
Supply air purification is provided by MERV8 and MERV14 panel filters (PM2.5 > 75%). To meet more stringent air quality requirements the unit can be upgraded with carbon MERV14 filter and HEPA filter (PM2.5 > 95 %) (purchased separately).
Extract air is purified by a panel MERV8 filter.
The units feature high-performance, electronically commutated (EC), external rotor motors with forward curved blades. These state-of-the-art units offer excellent energy efficiency. In addition to that, EC motors combine high performance and optimum control over the entire speed range. EC motors have an excellent power efficiency (up to 90 %).
The units are equipped with a summer bypass function.
The DVUT units feature a counter-flow heat exchanger made of polystyrene or aluminium.
The heat from the extract air is transferred to the supply air via the heat exchanger which greatly helps reduce ventilation heat losses.
This can lead to formation of condensate that is collected in a special drain pan and discharged into the sewage system.
In warm weather, the unit can either be used in its summer bypass mode (fresh intake air is directly supplied to the room, bypassing the heat exchanger and not coming in contact with warm extract air) or, if air conditioning is being used, the extract air will cool the heat exchanger and bring fresh air at the same temperature as the air-conditioned air that is being extracted.
In units without an electric preheater the supply fan is shut down automatically, using the feedback from the e xtract air temperature sensor, to let the warm extract air thaw the heat exchanger. The supply fan then re-activates and the unit reverts to normal operation.
The units may have a built-in or remote control panel.
|Built-in control panel||+||+||+|
|Remote control panel||+||+||+|
|Speed setting in the 0 to 100 % range||+||+||+|
|Filter maintenance warning||+||+||+|
|Weekly schedule operation||-||+||+|
|Supply air temperature setting||-||+||+|
|Lineup Vents DVUT HB EC||Maximum performance, CFM||Control system||Control||Sound pressure level LpA at 10 ft|