These are our most rugged, durable oil furnaces, with heavy-gauge heat exchangers and premium features. They are designed and built at the International Comfort Products, LLC, plant in Canada where oil furnaces have been the major focus for over forty years. We manufacture oil furnaces in a wide variety of configurations, including a variety of low-profile models. There are even models that fit into tight spaces like attics and closets. These advanced, deluxe models in the Tempstar family of products are built to give you years and years of constant use.