Projectors like most other equipment are designed and built with a particular purpose in mind.  Just like you wouldn't buy a sports car to take 4WD off-road, you shouldn't purchase a super portable projector for long hour fixed installation use.  Below is a table showing some current 2010 models their key features and how you might apply them to your requirements. 

The typical school classroom requires a bright, high resolution projector.  Designed for fixed install with good cooling and a wide range of inputs.  Ideally the unit will not have too many features which are not required in order to keep the capital acquisition costs down.

The EPSON EMP-83H is a high-performance and affordable projector ideal for installation or for presenters on the move. Whether it's professional quality required in business or bulletproof reliability in education - the EPSON EMP-83H delivers unmatched features and functionality.

• Brightness of 2200 ANSI lumens
• XGA resolution
• Contrast 400:1
• 4000 hour lamp life!
• Built in 10W sound, which means you can virtually do away with powered speakers (up to 5x the speaker wattage of other projectors in its class)
• Offers great connectivity via 2PC inputs (RGB), AV out for external speakers, RS232 for control & RJ45 for control over network
• 3 year warranty

This unit is very well suited to fixed installations.  Complete with looping audio it can be combined with a Joey control panel for maximum benefits of use.

Click here for an EMP-83H PDF Brochure

The networked projector takes the modern classroom to a NEW level.  Using the advanced features of a networked projector, the teacher can move the projector connection from their own PC to that of any networked computer in the room at the stroke of a few keys.  This projection technology will take collaboration and interactivity in the classroom to a new level!

Designed to suit a range of corporate and educational presentation environments, the EPSON EMP-1825 projector delivers new levels of performance & flexibilty for presenters in the corporate or education environments. Featuring advanced technologies and features, such as multi–screen display and advanced wireless connectivity and security, the Epson EMP–1825 is a major step forward in the world of wireless 3500 ANSI lumens projectors. The projector incorporates cutting-edge network ready technology.

• Brilliant 3500 ANSI lumens
• XGA resolution
• Contrast: 500:1
• Multi screen display - simultaneous single computer control of up to four projectors
• Ability to be network connected - either wired or wirelessly
• Advanced wireless security - enterprise level wireless network and security.
• Installation convenience - 80inch screen from just 2.4 metres.

This unit is very well suited to fixed installations.  Complete with looping audio it can be combined with a Joey Control panel.

NETWORK FLEXBILITY.

A key benefit of the EMP-1825 is its ability to be network connected either wired – via the in–built RJ–45 network connector – or wirelessly.

Using Epson's NS connection wireless mode, the EMP-1825 supports 802.11a/b/g protocols, achieving a wireless transfer rate of up to 54Mbps. This high speed wireless capability represents new levels of presentation performance and freedom.

Contributing significantly to the EMP-1825's high performance when operating in a wireless network environment is the Epson NS Connection technology, designed specifically to improve the compression and decompression of data; resulting in superb image quality and transfer speed.

Click Here for an EMP-1825 PDF Brochure

The networked projector takes the modern classroom to a NEW level.  Using the advanced features of a networked projector, the teacher can move the projector connection from his own PC to that of any networked computer in the room at the stroke of a few keys.  This projection technology will take collaboration and interactivity in the classroom to a new level!

Portable and powerful - The EMP-1715 ushers in a new era of incredibly lightweight, high performance data projectors with the flexibility to deliver outstanding results in any presentation environment. With advanced PC free functionality, multi screen display & smart connectivity it is designed to meet the high demands of presenters who require flexibility on the move!

• Incredible brightness to weight ratio - 2700 ANSI lumens: 1.7kg
• Sized at only 193 x 273 x 68mm
• Quick start-up and INSTANT shut-down for on-the-go presentations
• Password Protected security
• Lamp life up to 3000 hours
• Stylish, durable carry bag
• Advanced 3LCD technology

PORTABILITY.

The EMP-1715 packs a powerful 2700 ANSI lumens while weighing just 1.7Kg.  The lightest and brightest in it's class, the EMP-1715 outshines the competition with a level of functionality and portability that belies its compact design.  Designed for presenters on the move, it includes a stylish carry bag and is backed by a 2 year warranty.

Click here for the EMP-1700 Series PDF Brochure