Trends show the market for solar combisystems — systems that provide both domestic water and space heating — has potential to expand. An estimated 42,000 of these systems are installed in the United States, and the market is growing slowly.
Many of the solar combisystems utilized in the United States to-date are custom systems. Much of this is due to the limited availability of combisystem-specific products and the lack of thorough industry standards related to these systems. As a result, the success of this segment of the industry has depended heavily upon the expertise of the designer and installer, who are often the same person.