Made to Order - 1-4 Week Lead Time Depending on Availability Spot heating is a way to efficiently heat portions or specific areas of a space, as opposed to an entire floor or large area. With the OCH Series Outdoor/Indoor Quartz Infrared Heater OCH57277VSSE by TPI, spot heating is guaranteed to be cost-effective both in indoor and outdoor spaces.The OCH57277VSSE has a frosted quartz tube heating element that produces a 60° symmetric heat pattern. It can easily cover spaces like waiting areas, cold spots, small offices, work areas, basements