This unit has been upgraded as follows: * Upgraded base design which includes: o New material which is more resistant to chemical & environmental degradation o Increased wall thickness to reduce the risk of physical damage (cracking etc.) to the base and casters o New caster design which includes longer connecting stems improved fit and durability o Note the new base design was first implemented in the 1025 concentrators in May 2020 and will be implemented in the 525 series in the coming weeks o Longer/larger sieve beds which improve overall sieve bed performance and increase the bed useful life o Upgraded compressor cup seal material with greater heat resistance which extends life of compressor cup seals improving overall compressor performance o Use of brass screw inserts and machine screws at all cabinet connection points which improves the overall stability and durability of concentrator shell o Reduced internal operating temperature (through various component and system updates) which extends product life by reducing wear on key internal components Product Warranty 3 Years for new units sold on or after January 4 2011 * Exclusive DeVilbiss OSD© (Oxygen Sensing Device) standard on every unit -- increases accuracy and reliability for longer service intervals * Noticeably quiet operation * Readily accessible patient controls and protected cannula fitting * Two-year dealer service interval * Recessed humidifier nook prevents damage * Easy to assemble/disassemble two-piece cabinet for ease of maintenance * Lockable flow meter - Pediatric flow meter available * Convenient top and side handles for easy transport * Accommodates up to a 50-foot cannula (15.3 meters) * Intake filter features a translucent back to allow technician to quickly determine if the filter is dirty * Alarms: High/low pressure low flow low oxygen power fail Oxygen Sensing Device * Power Consumption: 310 Watts (270 Watts @ 2.5 lpm or less) * Works with the Invacare Home Fill cylinders * Accessories such as masks cannulas etc. are not included