January 14, 2013

-Carl Thurnau (SED) agreed to provide a quick review of the project since the majority of work is roofing.  The anticipated review for the entire roof and pool unit is 4 weeks.

January 28, 2013

- Discussion occurred on the efficient Air System pool unit to accommodate the existing roof curb on the HS roof in order to reduce labor costs.  Typical pool units require roof curbs to be customized for their specific equipment since they are prefabricated units.  Efficient Air Systems will customize the pool unit to fit your roof conditions.  Pursuing this option will save the district an estimated $12,000.  I requested that M/E Engineering move forward with the Efficient Air System option in order to save money.

- Increasing the efficient Air System height by 24" to accommodate the new plenum will save the district another $12,000.  The majority of mechanical equipment will still be accessible for the roof.  One door will require a ladder to safely reach and perform the necessary maintenance due to the height increase. I requested that M/E Engineering move forward with the 24" height increase. 

- I raised concerns with the exposed 24" return air plenum on the roof.  Since the original supply and return roof penetrations will be reused, this duct work will be exposed for approximately 60" considering the newer unit is significantly shorter than the existing PoolPak unit.  Bruce Knapp stated the section of duct work will be insulated and sealed.  Infiltration of elements will not be an issue since everything is insulated and sealed.

- Raising the pool unit 24" will not affect the overall price of the efficient Air System.  The anticipated cost for the new pool unit is $125,000.  This does not include the labor to install the unit.  The original base bid estimate for the unit is $310,000. 

-Confirmation on the proper propylene glycol ratio requirements for the new pool unit versus what the district is currently using for the existing roof top units.  The district is currently utilizing a 33%-45% ratio.  Bruce Knapp confirmed that the efficient Air unit recommends a 40% ratio.  He feels that our existing practice will be sufficient to sustain the new unit.

-Confirmed that the new pool unit will receive a coated coil within the unit.  The original design did not call for a coated coil.