If you are going to use the compressor for continuous use or any more than 2 people using tools at one time, then you need to be looking at screw compressors. The highest direct drive compressor you can get is 20 CFM and the highest CFM from a belt driven is the twin at 34 CFM delivered.

If the CFM figure is bigger than 50 CFM then you will need a screw compressor. If its 2 people, then multiply the CFM required by 1.7.

This is to over compensate the CFM required. How many people will be using tools at one time? So if you are planning on use say an 3/8” impact wrench, a ¼” drill and sometimes a belt sander, then pick the sander as your highest CFM tool at 27 CFM If its tools, please tick the tool with the highest continuous use CFM requirement. Multiply motor kW by 2.1 = output in L/sec / FAD Multiply motor kW by 4.5 = output in CFM / FAD Multiply motor hp by 3.3 = output in CFM / FAD Quick guide to CFM/FAD output (approx) of existing compressor

The result figure is the minimum free air you require. Using the air tools CFM table, add all the tools CFM together and divide by three. Using the air tools CFM table, add all the tools CFM together and divide by two. air-compressors/110-volt-air-compressors.html There are limited compressors available running off 110 Volts. Three-phase compressors are more efficient producers of compressed air than single-phase equivalent units, so where a three-phase supply is available the best option is the three-phase compressor.

Approx 2/3 cost saving over single phase.

The biggest compressor you can get is the ABAC A29B 150 FM3 air-compressors/professional-industrial-compressors.html These are all the single phase 20 amp compressors available: This is because of the draw on the starter motor. abac-pro-a29b-90-cm3-b312-100-belt-drive-air-compressor-3hp-90-litre-14-cfm.htmlĪny single phase compressor bigger than 3hp on a 150 litre air receiver will require a minimum of 20 Amps supply, with type D breakers. The biggest compressor you can get that runs off a 13 Amp plug is the ABAC A29B 150 FM3 air-compressors/workshop-semi-professional-air-compressors.html

air-compressors/garage-diy-air-compressors.html Here are all the compressors available that run off a 13 Amp plug: Note: Do not use long extension cables when running the compressor! Better to use a long air hose.

What are the future plans? More staff and tools?.

If so, what size compressor is it? Does it cope ok with the current demand on it?.

What electricity supply is available at your premises? (single or three phase).

Compressor 3.5 tutorial