The Clam Portable Propane Radiant Heater Series is designed for sportsmen, ice anglers, campers, and anyone needing dependable heat in rugged conditions. Built tough for the outdoors but CSA-certified for safe indoor use, these heaters offer powerful performance in a compact, portable design. Each model features tip-over protection, an oxygen depletion sensor, and a sturdy non-slip or foldable base, ensuring safe and reliable operation wherever you need heat. Available in three sizes, you can choose the heater that best fits your space and comfort level: Clam CH-4200 (Small) Compact and ultra-portable, this 4,200 BTU heater is perfect for shelters up to 105 sq. ft. Runs up to 5 hours on a single 1 lb. propane tank. Lightweight at only 4.75 lbs. with a foldable base for easy storage. Clam CH-10000vh (Medium) The first propane heater with a variable heat range (5,500–10,000 BTU), giving you precise temperature control. Heats spaces up to 250 sq. ft. with electronic ignition for quick starts. Compatible with 1 lb. disposable tanks (2–4 hrs. runtime) or 20 lb. refillable tanks (45–78 hrs. runtime). Weighs 9.25 lbs. with a durable non-slip base. Clam CH-16000vh (Large) Powerful dual-stage variable output ranging from 6,000–16,000 BTU, capable of heating up to 400 sq. ft. Runs on two 1 lb. propane cylinders (2.5–7 hrs.) or connects to a 20 lb. tank (26–70 hrs.). Features electronic ignition, two variable heat zones, and a rugged 15 lb. frame for larger shelters. Whether you need a compact heater for your ice shack, a versatile variable-heat option for camping, or a high-powered unit for larger shelters, Clam heaters deliver safe, dependable heat indoors or out.