RFI Question and Answer - HVAC B122 Q.1-30 v2.pdf

RFI responses for Project: HVAC Replacement Main Building 122

W50S6T25QA034

Current as of: 17 Sep 2026

QUESTION ANSWER

1. SOW 3.1.4.1 reads “Four (5) 5 tons units.” We interpret the intended rooftop-unit quantity as four (4) 5-ton units plus one (1) 7.5-ton unit, for five rooftop packaged units total. Please confirm.

(5) 5-Ton units

2. SOW 3.1.4 states that the new units are to be mounted on new curbs, while 3.3.3 refers to providing adapters to the existing roof curbs.

Please confirm whether the existing curbs are to remain with new curb adapters, or whether the existing curbs are to be removed and replaced with new curbs.

Existing curbs will remain and adapters for new units will be installed if needed.

3. For the required connection to the existing WEB

Control system, are any existing mechanical/controls drawings, equipment information, control-system make/model, point lists, or other controls documentation available for bidders to review before or at the site visit?

The government will arrange to retrieve drawings from Pacific West (automated logic regional vendor). Web-Ctrl is available on-site if needed for operational questions.

4. Are economizers required/allowed for units 3 tons and over?

No economizers

5. Are there any controls requirements or are we providing local thermostats?

WebCTRL controllers will be disconnected and reconnected.

6. How many heads are attached to each mini split unit and what is the average run of each line set?

One head per unit at 25 ft run.

7. Request to provide As Built Mechanical Plans. As-builts will be provided to awardee.

8. HVAC Equipment Photos.

a. Please provide a clear photograph of the nameplate for each existing HVAC unit scheduled for replacement.

Not available at this time.

9. Existing Building Automation System (BAS) Integration.

a. Please confirm whether the existing HVAC control system serving Building 122 is WebCTRL (Automated

Logic).

b. If WebCTRL is the existing BAS, please provide the following information:

• Existing WebCTRL software version and server information.

• Existing field controller model numbers serving

Building 122.

• Existing communication protocol (BACnet/IP, BACnet MS/TP, or other).

WebCRL (Automated Logic). For the purposes of this project control system is not relevant, the replacement units should be able to connect with existing system.

• Required points list for each rooftop unit and mini-split system.

• Requirements for graphics, alarming, trending, scheduling, and reporting.

• Clarification whether existing controllers may be reused or if new BACnet controllers shall be furnished.

• Confirmation that required WebCTRL licenses, server access, database integration, and front-end programming will be provided by the Government or existing BAS provider.

• Clarification whether the scope includes full controls replacement and programming or only integration to the existing BAS.

10. Mini-Split Mounting Configuration

a. Please confirm that the indoor mini-split units are intended to be surface wall-mounted.

The indoor mini-split units will be wall mounted.

11. Economizer Requirements.

a. Please confirm whether economizers are required on each rooftop package unit being provided under this project.

No economizers

12. Rooftop Unit Quantities and Capacities.

a. Section 3.1.4 identifies the replacement of five (5) rooftop package units; however, Section 3.1.4.1 references "Four (5) 5-ton units." Please clarify quantity of rooftop units to be replaced.

(5) 5-ton units

13. Roof Curbs and Adapters. The Statement of Work references both new roof curbs and custom roof adapters. Please clarify:

• Whether existing curbs are to be removed and replaced.

• Whether new equipment is intended to utilize custom adapters on existing curbs.

• Which approach should be included in the bid.

Adaptors to be used

14. Gas Piping Scope. Please confirm whether modifications to the gas piping system beyond final equipment connections are required as part of this project.

No modification to existing piping, other than new connections, required

15. Test and Balance. Please provide the project's Test and Balance acceptance criteria. Please clarify:

• Whether an independent certified TAB contractor is required.

airflow and balancing reports must be submitted to the Government

• Whether final airflow and balancing reports must be submitted to the Government as part of project closeout.

16. Duct Cleaning Requirements. Please provide mechanical drawings or estimated ductwork quantities associated with this project.

Additionally, please confirm whether duct cleaning shall include:

• Supply air ductwork.

• Return air ductwork.

• Outside air ductwork.

• Exhaust air ductwork.

17. Line Sets - Split Units. Please confirm whether the existing split-system line sets are to be reused or replaced.

Replace existing split system line sets

18. Existing As-Built Documentation. Are mechanical, electrical, and controls as-built drawings available for

Building 122? If available, please provide electronic copies for bidding purposes.

19. 1. Are there HVAC/mechanical plans, drawings, equipment schedules, roof plans, control diagrams, or as-built drawings available for Building 122? If so, could you please provide them or advise where they can be accessed?

Yes

20. 2. The Statement of Work states that five (5) roof-mounted HVAC package units are to be removed/replaced; however, Section 3.1.4 appears to contain an equipment quantity discrepancy. Please confirm the exact quantity, tonnage, and type of rooftop units that are to be replaced.

(5) 5-ton units

21. 3. Are the existing HVAC unit manufacturer/model numbers, electrical requirements, gas requirements, curb dimensions, or equipment nameplate information available

Yes. We will send pictures

22. 4. Are there additional requirements or specifications regarding integration of the new HVAC equipment with the existing WEB Control system?

No

23. 5. Were any questions, answers, photographs, measurements, equipment information, or other relevant information obtained during today's

September 17 site visit that will be distributed to offerors who were unable to attend?

24. 3. Is a crane lift plan required?

Yes: Anything above 18 ft requires FAA clearance

25. 4. Is the interior ductwork accessible through the ceiling? Are the ceilings T-bar or drywall? Will need access for duct cleaning.

Yes, it is accessible through the ceiling.

There is T-bar

26. 5. Are balancing dampers installed in the existing ductwork for testing and balancing?

Yes

27. 6. Are the packaged units and mini-splits controlled by standalone thermostats or a DDC/BMS system? If

DDC/BMS is used, please identify the controls system.

NO

28. 1. Mechanical As-Builts / Equipment Photos

If available, could you please provide the mechanical as-built drawings for Building 122, along with photographs of the existing HVAC equipment, including the rooftop/package units and indoor high-wall fan coil units? Since photographs were not permitted during the site visit, these would be very helpful for our pricing and equipment selection.

29. 2. Package Unit Quantity

During the site visit, it was mentioned that there may be six (6) package units, while the current SOW identifies five (5). Could you please confirm the correct quantity of package units to be replaced?

(5) 5-Tons, (1) 7.5-Ton

30. 3. Economizer Requirement

Could you also please confirm whether economizers are required for the replacement package units and, if so, whether this requirement applies to all units?

No economizers