There are two ways to have your electrostatic air cleaning unit refurbished.  Refurbished units with a new power pack installed are guaranteed for two years. If you are located outside the New England area, contact us and we will arrange for shipping.  All shipping charges are included in the refurbishing cost.  Refurbishing includes the following at a cost of $950.00 per unit. Steam cleaning of the inside and outside of each unit. Removal and cleaning of the diffusers Removal and cleaning all insulators, checking for any cracks. Replacement of any needed electrical wiring. Check and replace indicator lighting if faulty. Test the electrical discharge of the power pack. Wash the collection cells, ioniozer sections and pre/post mesh filters. Test the motor. Test the unit ensuring its proper overall function. If you are located in southern New England our technicians will come into your factory and remove the units, transport them to our facility for refurbishing, then reinstall the units back at your factory at a cost of $1299.00 per unit.