This Tri-Star thermostat is a replacement for the following models:
Tri-Star AC-208, AC-209, AC-210, AC-211, AC-212, AC-213, AC-214, AC-215, AC-216, AC-217, AC-218, AC-219, AC-220, AC-221, AC-222, AC-223, AC-224, AC-225, AC-226, AC-227, AC-228, AC-229, AC-230, AC-231, AC-232, AC-233, AC-234, AC-235, AC-236, AC-237, AC-238, AC-239, AC-240, AC-241, AC-242, AC-243, AC-244, AC-245, AC-246, AC-247, AC-248, AC-249, AC-250, AC-251, AC-252, AC-253, AC-254, AC-255, AC-256, AC-257, AC-258, AC-259, AC-260, AC-261, AC-262, AC-263, AC-264, AC-265, AC-266, AC-267, AC-268, AC-269, AC-270, AC-271, AC-272, AC-273, AC-274, AC-275, AC-276, AC-277, AC-278, AC-279, AC-280, AC-281, AC-282, AC-283, AC-284, AC-285, AC-286, AC-287, AC-288, AC-289, AC-290, AC-291, AC-292, AC-293, AC-294, AC-295, AC-296, AC-297, AC-298, AC-299, AC-300, AC-301, AC-302, AC-303, AC-304, AC-305, AC-306, AC-307, AC-308, AC-309, AC-310, AC-311, AC-312, AC-313, AC-314, AC-315, AC-316, AC-317, AC-318, AC-319, AC-320, AC-321, AC-322, AC-323, AC-324, AC-325, AC-326, AC-327, AC-328, AC-329, AC-330, AC-331, AC-332, AC-333, AC-334, AC-335, AC-336, AC-337, AC-338, AC-339, AC-340, AC-341, AC-342, AC-343, AC-344, AC-345, AC-346, AC-347, AC-348, AC-349, AC-350, AC-351, AC-352, AC-353, AC-354, AC-355, AC-356, AC-357, AC-358, AC-359, AC-360, AC-361, AC-362, AC-363, AC-364, AC-365, AC-366, AC-367, AC-368, AC-369, AC-370, AC-371, AC-372, AC-373, AC-374, AC-375, AC-376, AC-