PW_26-05B_Question_&_Answer_Report.pdf

County of Napa, CA

Public Works Steven Lederer, Department Head

1195 Third Street, Napa, CA 94559

(707) 299-1733

QUESTION & ANSWER REPORT

Invitation For Bid - Napa County Animal Shelter Phase I Furnace Replacement

QUESTION & ANSWER REPORT

IFB No. PW 26-05B

Napa County Animal Shelter Phase I Furnace Replacement

RESPONSE DEADLINE: August 25, 2026 at 11:30 am

Wednesday, August 19, 2026

Approved, Unanswered Questions

30. Mandatory Prebid List

Aug 12, 2026 8:29 AM

Question: Will you post the list of prebid attendees? - never mind I see them

Aug 12, 2026 8:29 AM

Approved, Answers Provided

1. Required License B

Aug 5, 2026 9:17 AM

Question: The project doc states a "B" license is required . The scope of work appears to be 100% C20 HVAC. Maybe a sub required but not likely. Would the owner consider allowing a c20 to bid as prime?

Aug 5, 2026 9:17 AM

Answered by Sonja El-Wakil: The work includes some minor electrical (panels) as well as plumbing (gas line). A B license is required.

Aug 17, 2026 10:49 AM

2. No subject

Aug 5, 2026 5:09 PM

Question: Electrical – does the inside panel (near the east furnace) feed both furnaces?

Aug 5, 2026 5:09 PM

IFB No. PW 26-05B

Answered by Sonja El-Wakil: Yes, see panel schedule on drawing E301. Keynotes 2 & 4 both point to the proper circuits.

3. No subject

Aug 5, 2026 5:11 PM

Question: Electrical – it is unclear which main panel switch feeds the interior furnace panel?

Aug 5, 2026 5:11 PM

Answered by Sonja El-Wakil: See elevation plan on plan sheet E301 keynote 1. The breakers are not marked; coordinate with County's Representative and shelter operations before turning off power.

4. No subject

Aug 5, 2026 1:47 PM

Question: Will temporary heating and/or cooling be required?

Aug 5, 2026 1:47 PM

Answered by Sonja El-Wakil: No, pending anticipated mild seasonal weather and short duration service disruption related to demolition and new installation.

5. No subject

Question: Is duct cleaning required for the forced-air furnace systems and exhaust systems?

Aug 5, 2026 1:47 PM

Answered by Sonja El-Wakil: Duct cleaning scope of work is noted in plan sheet M003 Mechanical Scope of Work - New Work #10, 11, and 13. Duct cleaning scope of work is also noted on M201, M202, and M203 for more detailed information.

6. No subject

Question: Is duct leakage testing is required for the forced-air furnace systems and exhaust systems?

Answered by Sonja El-Wakil: Not required.

7. No subject

Aug 5, 2026 1:48 PM

Question: Will pre-construction TAB be required?

Aug 5, 2026 1:48 PM

8. No subject

Question: Will fire/smoke dampers be required to tie in to existing fire alarm system?

Aug 5, 2026 1:48 PM

Answered by Sonja El-Wakil: There is no new fire/smoke damper in the project. There are new duct mounted smoke detectors that need to be interfaced to the existing building fire alarm panel.

9. No subject

Question: Will painting be required for the exterior natural gas piping?

Aug 5, 2026 1:48 PM

10. No subject

Question: Is the valve shown on P301 a 2” shutoff valve or a 2” seismic earthquake valve?

Aug 5, 2026 1:48 PM

Answered by Sonja El-Wakil: Provide 2" seismic shutoff valve and a 2" gas valve per plan sheet P301 and P401 detail 1.

11. No subject

Question: Is the valve shown on P301 to be threaded or flanged?

Aug 5, 2026 1:48 PM

Answered by Sonja El-Wakil: Threaded.

12. No subject

Aug 5, 2026 1:49 PM

Question: Please list any deferred submittals that are required for this project.

Aug 5, 2026 1:49 PM

Answered by Sonja El-Wakil: The following items will constitute a deferred submittal to the owner; see plan sheet S501 for further information: 1. Design, provide and install fully functional plenum boxes, plenum box bracing and anchorage, ductwork bracing, furnace bracing and anchorage for furnace F-4 and furnace F-5. Design per Contractor's engineer. See S501 for additional information.

13. No subject

Question: Will BIM coordinated shop drawings be required?

Aug 5, 2026 1:49 PM

Answered by Sonja El-Wakil: Shop drawings shall be provided in PDF format and include: the new furnace and associated ductwork inside the mechanical room with fabrication of the return air plenum box, as well as a simple piping isometric of the gas piping work at the outdoor mechanical yard.

14. No subject

Question: Is the construction of the plenums to be 12 gauge, or is 20 gauge acceptable?

Answered by Sonja El-Wakil: Gauge 12 per plan sheet M301.

15. No subject

Question: Please verify that the controls for this project are stand-alone, wall-mounted thermostats

Aug 5, 2026 1:49 PM

Answered by Sonja El-Wakil: The control is stand-alone type BACnet and wall mounted thermostat.

Please refer to plan sheet M202 key note #8 for additional control and plan sheet M401 for the new gas furnaces control sequence of operation and control interlocks with existing dog kennels exhaust fans, and new duct mounted smoke detectors.

16. No subject

Aug 5, 2026 1:50 PM

Question: Please confirm that the engineered design for equipment anchorage and plenum construction are the mechanical contractor’s responsibility.

Aug 5, 2026 1:50 PM

Answered by Sonja El-Wakil: Confirmed, yes.

17. No subject

Aug 5, 2026 5:05 PM

Question: Is there a building system to tie into?

Aug 5, 2026 5:05 PM

Answered by Sonja El-Wakil: The existing duct mounted smoke detectors at the furnaces will need to be demolished and replaced with new ones. The new duct mounted smoke detectors serving the new gas furnaces will need to be interlocked to the new gas furnace they serve as noted in plan sheet M401, to comply with the new gas furnaces sequence of operation and control. The new detectors also must be interfaced to the existing building fire alarm panel (see response to question #8 above).

18. No subject

Aug 5, 2026 5:06 PM

Question: Where are the thermostats located?

Aug 5, 2026 5:06 PM

Answered by Sonja El-Wakil: The location of the existing is shown on plan sheet M102 and the new shown on plan sheet M201, per call outs #5 and #6.

19. No subject

Aug 5, 2026 5:07 PM

Question: Is air balancing required?

Aug 5, 2026 5:07 PM

Answered by Sonja El-Wakil: Air balancing is required for the new gas furnaces supply air ductwork distribution air outlets, as noted in plan sheet M003 Mechanical Scope of Work - New Work #9 and M202 key note #9.

20. No subject

Aug 5, 2026 5:07 PM

Question: A: Is there a condensate neutralizer needed for each furnace? B: Is there a condensate pump if the condensate drain from new furnace is being tied to the existing hand sink inside the mechanical room? C: Is the condensate from the new furnace being drained to the existing hand sink inside the inside the mechanical room?

Aug 5, 2026 5:07 PM

Answered by Sonja El-Wakil: The new gas furnaces condensate drains are each connected to a new condensate neutralizer, then each connected to new a condensate pump, to be able to drain to the existing wall mounted sink drain tailpiece per plan sheet P201 key notes #5, #6, #7 and #8. A: Yes. They are noted in the M004 Furnace Schedule note #4. B: Yes. They are noted in the M004 Furnace Schedule note #4 and shown on P201 key note #6. C: Yes. The condensate drain is being drained to the existing hand sink drain tailpiece as shown on P201 key note #8.

21. No subject

Aug 5, 2026 5:08 PM

Question: What is the full extent of duct cleaning scope?

Answered by Sonja El-Wakil: Duct cleaning scope of work is noted in plan sheet M003 Mechanical Scope of Work - New Work #10, 11, and 13. Duct cleaning scope of work is also noted on M201, M202, and M203 for more detailed information.

22. No subject

Question: Is there any AC scope of work?

Aug 5, 2026 5:08 PM

Answered by Sonja El-Wakil: None.

23. No subject

Aug 5, 2026 5:12 PM

Question: Is there a condensate neutralizer needed for each furnace?

Aug 5, 2026 5:12 PM

Answered by Sonja El-Wakil: Refer to answer to question #20 above.

24. No subject

Aug 5, 2026 5:12 PM

Question: What is the location of shutoff valve?

Aug 5, 2026 5:12 PM

Answered by Sonja El-Wakil: The shutoff gas valve is located at the upstream of the main gas pressure regulator, roughly near the inside fence corner closest to the gate.

25. No subject

Aug 10, 2026 1:26 PM

Question: Is a BAS tie-in required?

Aug 10, 2026 1:26 PM

Answered by Sonja El-Wakil: See response to questions #8 & #17 above. No BAS tie-in is required. Please see response to question above regarding smoke detector tie-ins. There is no Siemens scope on this project.

26. No subject

Aug 10, 2026 1:29 PM

Question: Are any of the gas lines being replaced?

Aug 10, 2026 1:29 PM

Answered by Sonja El-Wakil: No, reuse existing piping.

27. No subject

Aug 10, 2026 1:29 PM

Question: Please confirm, is there a duct detector on fan coil #4 and not #5?

Aug 10, 2026 1:29 PM

Answered by Sonja El-Wakil: It's assumed the question pertains to the new gas furnaces F-4 and F-5. The existing duct mounted smoke detector at the existing gas furnaces will need to be demolished and replaced with new. The new duct mounted smoke detectors serving the new gas furnaces will need to be interlocked into each new gas furnace being served as noted in M401 for the new gas furnaces control sequence of operation and control. Duct detectors shall interface to the existing building fire alarm panel. Also see response to question #5 above.

28. No subject

Aug 10, 2026 1:31 PM

Question: a) Is a new outside air system included in the scope? b) Confirming, is the system to be set to 100% outside air?

Aug 10, 2026 1:31 PM

Answered by Sonja El-Wakil: A) There are existing HRVs to be tied into and reused. Below are the mechanical equipment interlocks for automatic ON/OFF operation: (N) Furnace F-4 operation interlocked with (E) HRV-2 and two (E) exhaust fans EF-3 and EF-3 (N) Furnace F-5 operation interlocked with (E) HRV-3 and one (E) exhaust fan EF-3 B) The new furnace design is confirmed to be set to 100% outside air. The return air is returned directly from the furnaces to the existing HRVs to transfer energy to the incoming outside air, which then supplies the new gas furnaces. The return air is then exhausted outside by the HRVs.

29. No subject

Aug 10, 2026 1:54 PM

Question: Is there concrete work at the new furnace replacements?

Aug 10, 2026 1:54 PM

Answered by Sonja El-Wakil: Provide concrete work per plan sheet S501.

31. No subject

Aug 17, 2026 8:58 AM

Question: What is the existing DDC system at the County facility operation control center?

Aug 17, 2026 8:58 AM

Answered by Sonja El-Wakil: The scope of this project is to install stand-alone furnaces. DDC County system does not apply.

Aug 17, 2026 10:59 AM

32. No subject

Question: Who is the DDC supplier for the county facility operation control center?

Aug 17, 2026 8:58 AM

Answered by Sonja El-Wakil: See response to question #31 above.

Aug 17, 2026 10:59 AM

33. No subject

Question: Who is the existing fire alarm vendor?

Aug 17, 2026 8:58 AM

Answered by Sonja El-Wakil: The vendor is Fortify Fire Protection.

Aug 17, 2026 1:38 PM

34. No subject

Aug 17, 2026 11:18 AM

Question: Please provide an extension to the current bid due date to allow additional time to review the project documents and prepare a complete and competitive proposal. Please confirm the revised bid due date.

Aug 17, 2026 11:18 AM

Answered by Sonja El-Wakil: Bid packages are due on the opening date: August 25, 2026, 11:30am PST.

Aug 17, 2026 1:38 PM