QUESTIONS AND ANSWERS.docx

QUESTIONS AND ANSWERS

1. On the Statement of Work, Section 4: Attachments, It says to the attached floorplans. Can you send that to us?

Refer to attachments 4, 5 and 6.

1. On the Statement of Work, Section 3: Description of Work

1. Item 1 – Says to demo and dispose of the current exhaust system. This is not a good idea. Currently you have 2 exhaust systems (one on each end of the building). Each one is ducted down to 18” off the floor. In the middle of the building on the roof, there is a outside air hood. The duct comes into the space and tee’s. In the vertical portion of this duct is a motorized control damper that is currently in the open position. You also have (2) Tox-Alert CO sensors located on the columns. One would think that on a call for carbon monoxide, the sensors would send a signal to the exhaust fans to start and the outside air damper would open bringing in fresh air to flush out the facility. Can you confirm this is the way the system operates?

Existing system can remain in place.

1. The vehicle exhaust system we had proposed earlier had nothing to do with the existing system, so removing it is a bad idea.

Existing system can remain in place.

1. Item 6 – Says to furnish and install separate heated make-up air unit designed to meet space and temperature requirements. The facility is currently heated with gas fired unit heaters. The unit we are proposing will provide tempered air for the vehicle exhaust and will only come on when the vehicle exhaust is turned on.

The intent of the make-up air unit is to replace air exhausted through the hoses with tempered outside air and only needs to operate when exhaust hoses are turned on.

1. Item 7 – Is there a reason for the concrete pad? Our intention was a vertical make-up air unit on the eastside of the facility and be mounted directly to the concrete.

Separate concrete pad is not necessary if existing concrete meets the need. Must be able to perform housekeeping for potential leaks.

1. Item 9 – The International Mechanical code only requires a smoke detector in the return air. This MUA is 100% outside air and therefore would not require a smoke detector. Also, the unit comes with a high limit, so if there is excessive heat in the unit itself, it will shut down.

If NFPA, ASHRAE and Mechanical Codes do not require smoke detectors for unit size and unit air supply/return then it is not required for the project.

NFPA 90A, para. 6.4.2.1 requires a smoke detector downstream of the air filters and ahead of any branch connections in air supply systems having a capacity greater than 2000 cfm.

1. Item 10 – We would assume all fire protection is already in place for the existing system.

If NFPA, ASHRAE and Mechanical Codes do not require additional fire protection for the system then it is not required for this project.

NFPA 90A, para 6.4.4.2 requires the smoke detectors to be connected to the existing fire alarm system.

1. Item – There are (2) sensors already in place. What is the intent here?

The intent is to ensure that the hose exhaust systems is on and running when connected to the vehicle with vehicle running.

If the existing sensors can be integrated into the new system, additional ones are not required.