Intertech Mechanical B.V. is a 100% independent concern, which is mainly concerned with developing, composing, building and assembling of; •Emergency power units •CHP-units •Containerised Gen-sets •Twin Packs •VPS-units All the units built by Intertech Mechanical B.V. will be tested and ran for trail before delivery. For testing the engines/ alternators/ units Intertech Mechanical B.V. has got a testing area for diesel-, gas-, biogas- and bio oil engines up tot and including 6MWe and 3MWth. Intertech Mechanical B.V. has a design and calculation division of its own; here we make a complete design and calculation of the units.