Since 1967, Tisdale Manufacturing has led the HVAC and Plumbing industry in developing ways to optimize on-site labor product ... ivity through off-site design, and manufacturing utilizing state of the art technologies and processes. Off-site simply means fabricating modular HVAC & plumbing skid packages in our shop and delivering them to the job site for safe, efficient, high quality and accurate installation. Our modular packages are designed using state-of-the-art 3D BIM technology to configure for efficient operation and delivery into exacting spaces. Our skid-mounted packages are typically mounted complete with inertia bases, controls and applicable devices. They are truly plug & play. read more