Special Bd. of Aldermen — 04/15/2019 Page 3
Alderwoman Kelly
Clearly we need to replace these; snowing inside does not make any sense. | was wondering | know you showed
us the heat map, do you have any idea how much you will save in costs in terms of heating and efficiency once
putting these new windows in?
Deputy Chief Carignan
So when we restarted the project a couple months ago, the Mayor had asked us to do this, however he had asked
us after the project had already been sent out to bid. So instead of spending the money to do the energy study,
we knew that they need to be done, so we opted to keep moving forward with the plan that we had. | am going to
discuss a study in 2011 an energy efficiency study, | will show you some of the results, that’s at the end of the
slide presentation. So | will get back to it and if you have some more questions we'll get an answer.
Alderman Dowd
Additionally the savings would be hard to calculate since part of this project is replacing the entire HVAC system.
So there is going to be a huge savings with a new, more efficient HVAC system as well. So the overall savings
will be far exceeded just fixing the windows.
Deputy Chief Carignan
Thank you. The second and probably the more important part of this project is the replacement of the HVAC
system. Again in 1999 several things were starting to fail as the building got 20 plus years old. We have what we
call a mechanical room, I'll get back to the pictures in a minute. This is part of our mechanical room. This is
original to the building in 1977 and it has been operating in the same manner since then. It is old and outdated
and continuous disrepair. As you can see the blue in the back, in the back upper right hand corner, that is part of
the HVAC system that manages the air flow in our gun range, our firing range, which is downstairs right below this
area. |’ll discuss that in a minute.
So in 1977 when this system began to fail a project was developed to replace it. That mechanical room was cut
out of the project because it was too expensive. Instead they opted to install hot water pumps, heat water pumps.
David Bailey, Captain Nashua Police Department
Just a correction, | think you said 1977, it was 2005 you meant for when they cut that out of the replacement, the
2005 upgrades to the HVAC System, that was originally on there and then the City asked to cut that out, so that
was cut out with the agreement with the Mayor at the time. If l’m not mistaken that was Streeter and that we
would come back in near future and seek additional funding to replace that.
Deputy Chief Carignan
So that has yet to be replaced and as a result of that, that room is still operating, however we had one piece of
equipment out on the roof that had failed at that time and that was also part of the system that was not to be
replaced; that has never been replaced. Without that system, it is forcing the heat water source pumps which are
operating throughout the system to do all of the work that is designed to do only half of the work. It is putting a lot
of stress on them and those are starting to break now.
Also, it should be noted that every piece of HVAC equipment, with the exception of the two heat water source
pumps we’ve replaced are operating off our 22 Refrigerant which in the year 2020 will no longer be available to
purchase and that is going to be an issue throughout the City that is going to have to be addressed. So different
portions of this mechanical room are breaking down. The mechanical room operates the air flow in our gun
ranges, | was talking about earlier. Vhat we started to find, one of the driving forces to fix this problem is that
