Hi AC guy here (f-gas qualified, amongst many other strings to my bow)
If you are on a budget/trying to save money I suggest you look at ducted units suspended in the ceiling. These are meant to be ‘hubs’ (for want of a better description) that produce cooled air which is ducted to ceiling vents where needed. However there is no reason why you have to attach ducts, or if you do they don’t have to be very long. They are basically just a radiator and fan in a box, the same as a regular CRAC unit (eg the Airedale kit) except they work horizontally instead of vertically. Most systems will let you move panels around to configure them such that the intake is underneath and outlet is on the front. Therefore if you hang them above your hot isle and point the outlet towards you cold isle (assuming this is one row of racks) they will do a mean job of keeping a small comms room cool for not a lot of money. Don’t hang them above the racks as tempting as that sounds in case your condensate pump fails and they drip water. For extra points you could build some kind of partition to separate the cold and hot isles but unless the room is large and/or you are looking for every last ounce of efficiency the air mixing is probably going to be an advantage. Also means you don’t need raised floor of course. We’ve done this at Colocker (www.colocker.com <http://www.colocker.com/>) both to cool the lockers themselves (which have a hot/cold partition) and the comms room (units sit in free air) so this is tried and tested. If you are local you are welcome to come and take a look. HTH Chris Chris Wilkie Managing Director Electronic Communities Ltd > On 29 May 2018, at 13:34, Charl Tintinger <ctintin...@gmail.com> wrote: > > Hi, > > I am looking for some advice. > > We are looking to build a lab for our new office with an estimated heat load > of around 20KW max. > > We have looked at doing underfloor cooling with something like an Airdale. We > have also considered just using wall mounted units (x many) to get the same > amount of cooling. > > So, if I ask an AC guy, they will sell me more kit, that's their business. > > This is not a DC environment however Id like to have the ability to keep > around 20KW worth of kit cool (at max). > > Any views on going mass wall mount with 2 rows of racks (front and rear > access) versus underfloor? > > The underfloor option costs around £70K more, struggling to justify the cost > difference. > > Thanks in advance. > > Charl >
