Heatstar - Indirect Fired Heaters

Understanding Heatstar’s Indirect-Fired Heaters

HeatStar indirect-fired heaters deliver clean, dry, and fume-free warm air, making them ideal for use in enclosed or occupied construction and industrial spaces. Built for durability and efficiency, these heaters use a powerful fan to circulate air across a heat exchanger, ensuring safe, odourless heating without introducing combustion byproducts into the environment. Compatible with a variety of fuels—including diesel, propane, natural gas, and more—they are designed to heat large areas effectively while offering portability, advanced safety features, and low-maintenance operation, providing a dependable solution for demanding job sites.

Why Choose Heatstar Indirect-Fired Heaters?

Heatstar indirect-fired heaters are an ideal choice for clean, safe, and efficient heating in enclosed or poorly ventilated spaces. Unlike direct-fired units, they produce 100% clean, dry air by separating combustion gases from the airflow, making them perfect for construction sites, temporary structures, and event spaces. Built with durable components, they offer high BTU output, reliable performance in extreme conditions, and versatile fuel options like diesel or natural gas, ensuring flexibility and dependability for various heating needs. These indirect-fired heaters are now available at our Canadian warehouse. You can also check them out below:

Heatstar HSP500ID-A Pro-Series Diesel/Oil Indirect Fired Heater

The Heatstar HSP500ID-A Pro-Series Diesel/Oil Indirect Fired Heater is a high-performance diesel/oil indirect fired heater delivering 500,000 BTU/HR of clean, dry, and fume-free air—ideal for workshops, event tents, kitchens, exhibition halls, and construction sites. Designed for safety and efficiency, it features a durable stainless-steel combustion chamber, a large 46-gallon fuel tank, electronic flame control, and an optional thermostat. With support for up to 100 feet of ducting, a heavy-duty frame, and UL certification, this heater ensures reliable, even heat distribution in demanding environments. Powered by various fuels, it operates on 120V and moves 4,032 CFM of air for optimal circulation.

Heatstar HSP400ID-G Pro-Series Propane/Natural Gas Indirect Fired Heater

The Heatstar HSP400ID-G Pro-Series Propane/Natural Gas Indirect Fired Heater delivers 399,000 BTU/HR of clean, efficient heat using either propane or natural gas, making it ideal for large industrial and rental applications such as construction sites and event tents. Designed with a durable frame, stainless steel combustion chamber, and advanced safety features—including electronic flame control and a water-resistant control box—this UL-certified unit ensures reliable performance in harsh conditions. It includes dual 12" duct adapters and supports up to 100 feet of ducting for flexible heat distribution.

Heatstar HSP300ID Pro-Series Indirect Fired Heater

The Heatstar HSP300ID Pro-Series Indirect Fired Heater delivers 285,000 BTU/hr of efficient, clean, and consistent heat, ideal for large event spaces or construction sites. Powered by diesel, kerosene, or jet fuel, it features a 27.7-gallon tank, heating areas up to 7,125 sq. ft. Its indirect heating system ensures exhaust gases are kept separate from heated air, providing safer and cleaner warmth. With durable stainless-steel components, a weather-resistant control box, powerful 1950 CFM airflow, and optional thermostat and ducting accessories, this UL-certified heater is built for flexibility, reliability, and long-lasting performance.

FAQs

1. What type of fuel can be used with indirect-fired heaters?

Indirect-fired heaters are versatile and can operate on various fuels, including diesel, natural gas, propane (LPG), or kerosene, depending on the model. This flexibility allows users to choose a fuel source that is most economical or readily available at their job site, making the heater suitable for different industries and locations.

2. Why are indirect-fired heaters popular for construction site heating?

Construction sites favour indirect-fired heaters because they produce clean, dry heat that doesn't introduce moisture or fumes, helping materials like paint, plaster, and concrete cure properly. Additionally, they prevent condensation-related damage to tools and structures, maintain worker safety in enclosed spaces, and are robust enough to operate in harsh weather.

3. How do you vent the exhaust from an indirect-fired heater?

Exhaust from an indirect-fired heater is vented through a flue or chimney system that must be directed outside the enclosed space. Proper venting is critical to safely remove combustion gases, and most units come with flue kits or ports that can be easily connected to ductwork or flexible piping to ensure safe, compliant operation.

4. What maintenance is required to keep an indirect-fired heater running efficiently?

Regular maintenance includes checking fuel lines for leaks, cleaning air filters, inspecting the burner and heat exchanger for carbon buildup, and ensuring that exhaust systems are unobstructed. Annual professional servicing is also recommended to ensure combustion efficiency, safety compliance, and to prolong the heater’s lifespan.

5. Can indirect-fired heaters be connected to ductwork for multiple room heating?

Yes, one of the advantages of indirect-fired heaters is their compatibility with ductwork, allowing warm air to be distributed across multiple zones or rooms. This makes them a great choice for temporary heating in large-scale venues, construction tents, warehouses, or events where heat needs to be spread over a wide area.