Warehouse heating and cooling?

[jakehabing]

I am installing the heating and a/c system in a new 6000 sqft warehouse. 100'x60'. The warehouse is located in northern missouri. This is the first commercal job that have done and I am not sure what would be the best system for this appication. I was thinking of installing two split systems and running tubelar ducts along the 100' sides of the building. One thing is I don't know what size of units to install or if this is the best option. A little history of the job. I am building the whole building ground up. it is a prefab steel buliding. I am still in design phase of the job. Again my experience is installing and servicing residential units. This is by far the biggest job I have done. Is my split system idea a good one? Are there online resorses that could help me figure out sizing? Also I would like any tip or advise from the experiened. Thanks.

[Brian_UK]

My advice would be to ask one of your equipment suppliers to provide a quote for the systems needed. That way you use the expertise of the supplier and it also gives you some form of protection if the system does not perform correctly.

[knighty]

if you're building a fresh building... why not install under floor heating ?

piece of cake to do with a fresh build, pretty cheap, and by far the most efficient way of heating ?

[install monkey]

till they open the loading bay door:D also fork lift trucks weigh in at around 2 ton,dexion racking full of pallets will have a high load per small footprint- will damage any screed covering. usually a warehouse for heavy traffic will be constructed by concrete slabs 12 in thick and will have a flexible expansion joint- no good for ufh- usually gas fired heaters,radiant tube heaters or package roof top units , normally they just open the door for free cooling-
if you're building a fresh building... why not install under floor heating ?

piece of cake to do with a fresh build, pretty cheap, and by far the most efficient way of heating ?

[Magoo]

Hi Jake.
what sort of conditions do you want to maintain within the warehouse, is it critical for storage conditions?. what is the structure materials etc.., ?

[jakehabing]

Magoo,

I would like to maintain comfortable conditions 72F. It is storage for a computer manufactureing company, so it does need to stay dry. The building is a steel building with an R-13 insulation value, roof and walls. I speced out 2 - 5ton heat pumps, with a 120000 btu, 95% furnace for each heat pump. I still am in the designing phase so I could change these units. I still am designing the duct system. I was thinking of maybe having the unit blow at one end of the building, hoping it will climatize the whole building with a few degree varience.

Jake



Hi Jake.
what sort of conditions do you want to maintain within the warehouse, is it critical for storage conditions?. what is the structure materials etc.., ?

[knighty]

till they open the loading bay door:D also fork lift trucks weigh in at around 2 ton,dexion racking full of pallets will have a high load per small footprint- will damage any screed covering. usually a warehouse for heavy traffic will be constructed by concrete slabs 12 in thick and will have a flexible expansion joint- no good for ufh- usually gas fired heaters,radiant tube heaters or package roof top units , normally they just open the door for free cooling-

no need for a screed ontop for the UFH, the thicker the slab it's installed in the better (more thermal mass)

and the expansion joints won't be a problem either as the expansion/contraction of the slabs averages out over the floor, with a microscopic difference between each slab
(with ufh they should all be at the same temp anyway)

[Bigfreeze]

till they open the loading bay door:D also fork lift trucks weigh in at around 2 ton,dexion racking full of pallets will have a high load per small footprint- will damage any screed covering. usually a warehouse for heavy traffic will be constructed by concrete slabs 12 in thick and will have a flexible expansion joint- no good for ufh- usually gas fired heaters,radiant tube heaters or package roof top units , normally they just open the door for free cooling-

Have been involved in ufh in aircraft hangars, its not a problem IM. 25mm pipe centered in 300mm slab. Will hold heat for days. Not ideal if the doors are open all day but perfect if only opened intermittently.