Indoor Air Quality

The project will be divided into 2 phases: Phase 1 will consist of replacing all air filters throughout the district and cleaning all coils and unit ventilators. DPS will provide a detailed list of filters and systems. Before and after air flow readings and pictures are required for a sample size of approximately 10% of the units per school). This includes approximately: 7,812 air filters- sizes found in Attachment C 490 Commercial Air Handler Units 123 Roof Top Units 652 Fan Coils Units 782 Unit Ventilators The above is distributed between approximately 50 campuses. On the Pricing Sheet – Attachment B, include unit pricing for additional units. Phase 1 Alternate A: Coil Sanitization Timeline for Phase 1: 2-4 months from notice to proceed. Phase 2 will consist of the following 5 steps: 1. Detailed assessment of HVAC systems in all DPS facilities to include: a. Current Indoor Air Quality, 3 samples per school to include basic mold and containments testing. b. Outside air flow; documenting design vs. actual or actual vs. ASHRAE c. Outside air control; availability and functionality of controls and dampers d. Air handler functionality and remaining design life (obsolescence) e. Assess current controls systems age and functionality with major equipment The above assessment report should note, with pictures, current conditions, deficiencies and specific recommendations for deficiency remediation. These will be used as the bases for steps 2 and 3 below. 2. Detailed estimates of recommended repair and replacement costs within five-year increments to 25 years. 3. Retro-commission of current control systems to ensure accuracy, consistency and functionality. This will be targeted to problem areas. Assume 25% of entire system. 4. Provide preventative maintenance plan and training as needed to DPS staff to maintain equipment Timeline for Phase 2: 3 months from notice to proceed to run concurrently with phase 1.

Division 23 -

Heating, Ventilating, and Air Conditioning (HVAC), Instrumentation and Control for HVAC, HVAC Air Distribution, Central HVAC Equipment.