VAV Box Retrofit for Ashrae 62.1 Compliance?
VAV Box Retrofit for Ashrae 62.1 Compliance?
(OP)
Hi All-
Noob here and I'm not an engineer, but I need to know if what my building engineer is telling me is right. I've got two old commercial office buildings with new (2006) air handlers and old VAV boxes and thermostats. Per my building engineer, the VAV boxes default closed and only open up when the thermostats direct them to send chilled air into occupied spaces. We want to put in an ASHRAE 62 compliant ventilation solution. My building engineer says the only fix is to put in new VAV boxes, which is going to be quite expensive. My question is, is there any other way to go about this that's cheaper (ie fixing the current VAV boxes open or putting in new thermostats) and is it worth paying a mechanical engineering firm to come in and propose a lower cost retrofit?
Thanks much in advance for any insight you can offer. I looked around for answers to this question but couldn't find anything in the past on it.
Noob here and I'm not an engineer, but I need to know if what my building engineer is telling me is right. I've got two old commercial office buildings with new (2006) air handlers and old VAV boxes and thermostats. Per my building engineer, the VAV boxes default closed and only open up when the thermostats direct them to send chilled air into occupied spaces. We want to put in an ASHRAE 62 compliant ventilation solution. My building engineer says the only fix is to put in new VAV boxes, which is going to be quite expensive. My question is, is there any other way to go about this that's cheaper (ie fixing the current VAV boxes open or putting in new thermostats) and is it worth paying a mechanical engineering firm to come in and propose a lower cost retrofit?
Thanks much in advance for any insight you can offer. I looked around for answers to this question but couldn't find anything in the past on it.





RE: VAV Box Retrofit for Ashrae 62.1 Compliance?
You probably want to speak with your controls rep. as well to find out what you are capable of with your existing controls.
The VAV boxes themselves are relatively cheap, it's the things you probably can't do without that will cost (changing controls, adding reheat).
RE: VAV Box Retrofit for Ashrae 62.1 Compliance?
RE: VAV Box Retrofit for Ashrae 62.1 Compliance?
RE: VAV Box Retrofit for Ashrae 62.1 Compliance?
I'd also recomend looking at the O&M literature to see if minimum box damper position can be reset.
I'd recomend asking your building engineer what controls the VFD.
RE: VAV Box Retrofit for Ashrae 62.1 Compliance?
RE: VAV Box Retrofit for Ashrae 62.1 Compliance?
y=x(1+X-Z)
RE: VAV Box Retrofit for Ashrae 62.1 Compliance?
RE: VAV Box Retrofit for Ashrae 62.1 Compliance?
It was in accrordance with Ashrae 90.1
RE: VAV Box Retrofit for Ashrae 62.1 Compliance?