Hi, I’m Geoff Brown, Vice President of Technical Solutions with Quest. I’d like to take some of your time to do an in-depth walkthrough of our Evolution Series grow room HVAC systems.
These are available from four to 32 tons. The one behind me happens to be a 16-ton unit. And that unit has two different circuits, two eight-ton circuits, and those circuits are entirely independent. So, it’s a dual compressor dual air path machine. And by having two completely independent circuits, we’ve got built-in redundancy there. Either of those circuits can operate independently of the other. Both of those circuits can also feature a variable capacity refrigeration system – so, either a two-stage compressor on the smaller systems or a variable speed compressor on 10-ton and larger compressor circuits; that’s the 20-ton or larger systems. All of these units also feature a compressor vestibule – standard across all of our product line – but we keep the major mechanical and refrigeration components out of the airstream. That allows you or your maintenance designate to work on the systems without interrupting the air flow. It allows us to very quickly fine tune these systems when they’re being installed, and it provides a great way forward from a maintenance perspective.
This system is also equipped with our optional economizer cooling. And that is a chilled water coil paired with our dry cooler, and that chilled water coil allows us to use cold ambient conditions – that is any day that’s roughly 50 degrees or colder outside – to pre-cool the air that comes through the system and to reduce our compressor runtime. So, it has the option or the opportunity to reduce our overall energy footprint by about 30%. We’re gonna spin the unit around and take a look at the air path and go through that in detail.
Now that we’re on the other side of the unit, I can sort of demonstrate how the air moves through the system and what happens to it. Right behind me is the return air opening. Air comes back from the grow room, gets filtered, and this is where we measure its temperature and relative humidity. It then moves through the economizer cooling coil, then through the evaporator coil, the reheat coil into the fan, and back into the space. This unit can be equipped with optional outdoor air openings, and those openings can be motorized. And the idea behind the motorized damper there would be to provide a purge function, either for a sulfur burn or for CO2 dilution or whatever. One of the things that you’ll notice is that not all of the air flow goes through the evaporator coil. And that’s by means of our motorized bypass damper, and that bypass damper changes position to control how much air flow goes through the coil to control the sensible heat ratio of the coil. By slowing the air through the coil down, we cool the air down more, we remove more water. If we close the damper, we push more air through the coil and we do more air conditioning, but less dehumidification. Again, it’s one of the ways that we tie the system performance as closely as possible to the room needs and adjust to changing conditions in the grow.
With these units, we offer a compact, cost-effective solution. A 16-ton unit without the economizer coil can fit through a standard 32-inch man door. And a 32-ton unit can go through a standard double door. So, if you’re retrofitting an existing building, or if you’ve got an existing facility that needs new equipment, it’s a great option for that. And paired with our dry coolers, they provide a very easy-to-install and again, very cost-effective reliable system. We really look forward to being able to learn more about your grow and whether or not we can apply one of these and help make your grow more efficient and more productive. Thanks.