Patent US 7,428,441

A two-way communication and data transfer system allows a field technician and a designer to work together to create a retrofit design for a flow system, make a cost estimate for the retrofit, and gather an approval from a customer all in a single visit to the customer site. The field technician can utilize a remote unit including a digital camera, data entry device, and communication device, which allows the technician to transfer images and dimension information about the existing system to a base unit. A designer can take this information from the base unit and generate a virtual design for a new system, allowing a virtual view and cost estimate to be generated for display to the customer. The technician and the designer can communicate during the process to improve the accuracy of the design and estimate.