10 Best Tube Heaters 2025 in the United States

This 400-watt marine bilge heater from Xtreme Heaters is designed to protect boat engine compartments and similar spaces like RV underbellies, campers, and greenhouses from freezing. Its compact size has improved by 10% while boosting power by 150 watts compared to earlier models, making it a solid choice if you're looking for a powerful yet space-saving heater. It operates between 40°F and 55°F, using a self-regulating PTC element that automatically turns on and off to maintain consistent temperatures, which helps avoid overheating and saves energy.

The heater is built tough, with an anodized case and sealed electronics to withstand moisture, vibration, and cold – important for harsh outdoor and marine conditions. It also includes a waterproof fan to boost heat circulation and can be mounted in any direction, including upside down, offering flexible installation options. Safety is a strong point here, meeting various marine and military certification standards, plus it has an LED indicator for easy temperature monitoring.

Its heating coverage of about 40-60 square feet is best suited for smaller compartments rather than large spaces. The heater plugs into a standard 110V outlet and weighs only 4 pounds, making it easy to install and move if needed. This heater provides reliable freeze protection with useful safety and efficiency features, making it ideal for boat owners and campers who need dependable warmth in confined or exposed areas, though it might be less effective for bigger rooms or open outdoor spaces.

The SunStar Infrared Ceramic Heater runs on natural gas and delivers a strong 80,000 BTU output, making it suitable for heating larger indoor spaces like workshops or garages. It is made from aluminized steel, which helps resist rust and extends the heater’s lifespan. The aluminum reflectors boost radiant heat efficiency, so it warms objects and people directly rather than just heating the air. With a length of 49 inches and a floor mount design, this heater fits well in spaces where floor placement is preferred. It also offers remote control for easy temperature adjustments, adding convenience.

Mounting options allow the heater to be angled horizontally up to 30 degrees, but it must be installed at least 14 feet above the floor to ensure even heat spread and comfort. Safety-wise, it requires clearances from combustible materials—49 inches above and to the sides, and 99 inches below—which means you need enough space around the unit to install it safely. This could limit use in smaller or cluttered spaces.

The heater is designed for indoor use and excels in energy efficiency by using radiant heat, which can save energy compared to traditional convection heaters when heating people directly. Since it’s a natural gas model, it requires a gas supply and professional installation. It is a solid choice if you need a powerful, durable indoor heating solution for larger areas and can accommodate the clearance and installation requirements. It combines efficient radiant heating with ease of use but may not be ideal for smaller rooms or users looking for advanced temperature controls.

The RHT-75-30-P Two-Stage Propane Gas Radiant Tube Heater is geared towards commercial, not residential, settings. With a substantial power output of 75,000 BTU, it’s well-suited for large spaces where significant heat distribution is required. The heater’s 30-foot length allows it to cover a wide area, making it an effective solution for warehouses or large outdoor areas.

Its construction features black-coated aluminized steel emitter tubes and mirror-finish aluminum reflectors, which are designed to enhance the heat radiation while potentially offering durability. However, the product’s specification that it is not approved for residential use limits its audience to primarily commercial users. In terms of mounting, it is designed for floor mount installation, potentially requiring professional setup to ensure safe and effective operation.

The heater operates on propane and has two speeds, allowing some flexibility in temperature control. Potential buyers should note the emphasis on commercial use and ensure the heater meets safety standards for their specific application. Its robust construction and high power output are certainly strengths.