Heliodyne, Inc. is a leading U.S. manufacturer of solar water heating equipment, proudly operating from the San Francisco Bay Area since 1976. We design, manufacture, and assemble a wide range of solar water heating solutions, including our Delta-T Controller line — a versatile and reliable control system for solar thermal applications.
Delta-T Controllers are compatible with nearly any brand of solar hot water system and can be used for domestic water heating, space heating, and pool heating. The Pro Series controllers are ideal for projects with additional heating needs, delivering consistent, efficient performance.
By bringing the Delta-T product information onto our main website, we’ve made it easier than ever to explore our full range of solar water heating products. While the Delta-T line is available for direct online purchase, our other Heliodyne products are sold through our distributor network. For more information, contact us at 888.878.8750 or sales@heliodyne.com.