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Table 2

Cost of Condensate P-Trap Maintenance,

On-Demand – Typical Conditions

A. Labor Costs . . . . . . . . . . . . . . . . . . . . . . . . . . . . per unit per yr. $25.00

1. Clean or replace blocked traps – bi-annually

2. Replace freeze-damaged traps – one in four annually

3. Clean-up after trap blockage and condensate flooding:

· HVAC system – floor and drain pan

· Other affected property – supporting structure, roof and roof covering,

building floor, furniture, other equipment

4. Clean-up after HVAC system start-up (twice annually for schools), condensate geysering (blowing) and flooding:

· HVAC system – floor, drain pan, fan, motor, inside walls,

ducts, etc.

· Other affected property - supporting structure, roof and roof covering,

building floor, furniture, other equipment

5. Travel time – Service and Supplies.

· To and from service site and supply houses

B. Service Equipment and Supplies . . . . . . . . . . . . per unit per yr. $5.00

1. Transportation Vehicle (mileage, etc.)

2. Maintenance Tools

3. Supplies – piping, fittings, biocides, etc.

C. Surrounding Property Damage . . . . . . . . . . . . . per unit per yr. $20.00

1. Supporting structure

2. Roof covering

3. Ceiling – tile, sheet rock, etc.

4. Walls – wood, sheet rock, etc.

5. Inside fixtures – desks, tables, etc.

6. Books and supplies

7. Floor and floor coverings

D. HVAC System Damage – Shortened Life . . . . per unit per yr. $30.00

1. Deterioration of internal components – floor, drain pan, walls, fan, fan motor,

ducts, control sensors, etc.

E. Human Health* . . . . . . . . . . . . . . . . . . . . . . . . . . . per unit per yr. +++?

1. HVAC system contamination (internal):

· Fungi, bacteria, and viruses

2. Aerosol mist generated by geysering, caused by entering high

velocity air – potential for spreading legionnella.

Total estimated costs . . . . . . . . . . . . . . . . . . . . . . . per unit per yr. $80.00

*Cost not estimated, but may exceed all other cost.

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