Specifications for the Used Healthdyne Allliance Home Concentrator for $200:

• Features:

  Pressure Relief Valve -35 +/- 2 PSI
  Thermal Protector in Compressor electrical windings - 145 Degrees F
  Domestic Unit Double Insulated Electronically
  Optional Oxygen Percentage Indicator: LED lights Optional
  CSA approved - Still available

• Dimensions:

  24.50" High x 16.25 wide x 14.50 deep

• Weight:

  59

• Warranty:

  90 Day Parts and Labor Warranty

• Alert / Alarm:

  Visual red lamp and audible for power failure, cycle malfunction and start up

• Electrical:

  115 VAC, 60 Hz, 450 watts

• Oxygen Concentration:

  1-5 Liters Per Minute (LPM) @ 90% +/- 3%

• Power:

  Visual, green lamp by the power switch