Heatstar - Indirect Fired Heaters

Heatstar Indirect Heaters for Industrial & Commercial Applications

Heatstar indirect-fired heaters deliver clean, dry, fume-free heat for enclosed spaces where air quality matters. These UL-certified heaters use advanced heat exchanger technology to separate combustion gases from heated air, making them ideal for construction sites, warehouses, event tents, and occupied buildings across Canada.

What Makes Heatstar Indirect-Fired Heaters Different?

Unlike direct-fired heaters that mix combustion byproducts with heated air, Heatstar indirect-fired heaters use a sealed combustion chamber and heat exchanger. This design ensures 100% clean air output while delivering powerful BTU performance from 70,000 to 500,000 BTU/HR.

Key Safety Features:

UL Certified for workplace safety compliance
Sealed combustion chamber prevents fume exposure
Electronic flame control with a water-resistant control box
Automatic safety shutoff devices for worry-free operation

How Indirect Fired Heating Works

Indirect-fired heating operates through a three-step process:

Air Intake: Fresh outside air enters through the intake vent
Heat Transfer: Air passes over a heat exchanger heated by the enclosed burner
Clean Air Output: Heated, uncontaminated air is distributed through the exhaust vents outside

This technology makes indirect-fired heaters perfect for spaces requiring clean air, including food preparation areas, occupied workspaces, and material-sensitive environments.

Our Top Heatstar Indirect Fired Heaters

Explore our lineup of powerful and reliable indirect heaters, each designed to meet the specific demands of your industry.

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

The Heatstar HSP500ID-A is a powerhouse, delivering 500,000 BTU/HR of clean heat. Its large 46-gallon fuel tank and robust design make it ideal for large construction sites, workshops, and event venues.

Heating Power: 500,000 BTU/HR
Air Volume: 4,032 CFM
Fuel Type: Diesel, Kerosene, Fuel Oil, Jet A
Key Features: Heavy-duty frame, lift bracket, 100 ft. ducting capability, and standard dual 12" duct adapters.

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

For ultimate fuel flexibility, the Heatstar HSP400ID-G offers 399,000 BTU/HR of efficient heat using either propane or natural gas. It's the perfect indirect-fired heating solution for industrial and rental applications.

Heating Power: 399,000 BTU/HR
Air Volume: 4,032 CFM
Fuel Type: Propane or Natural Gas
Key Features: Dual fuel capability, water-resistant flame control box, and factory-installed dual 12" duct adapters.

Heatstar HSP300ID Pro-Series Indirect Fired Heater

The Heatstar HSP300ID provides a reliable 285,000 BTU/hr, making it an excellent choice for mid-to-large-sized event spaces and construction sites.

Heating Power: 285,000 BTU/hr
Heating Area: Up to 7,125 sq. ft.
Fuel Type: Diesel, Kerosene, Jet Fuel
Key Features: 27.7-gallon tank, solid rubber wheels for portability, and optional ducting accessories.

Sizing Your Heatstar Indirect Heater

Quick Sizing Guide:

Small spaces (up to 2,500 sq ft): HSP70ID or HSP100ID
Medium spaces (2,500-5,000 sq ft): HSP200ID or HSP300ID
Large spaces (5,000+ sq ft): HSP400ID-G or HSP500ID-A

Professional Sizing Formula:

Calculate space volume: Length × Width × Height
Apply BTU factor:

Well-insulated: 25-35 BTU per cubic foot
Average insulation: 35-45 BTU per cubic foot
Poor insulation: 45-60 BTU per cubic foot

Essential Accessories for Your Heatstar System

Ductwork Options:

Flexible heat ducts: 25-foot lengths for extended reach
Single duct adapters: 12", 14", and 16" diameter options
Dual duct adapters: Maximum air distribution
Chimney pipe: 6" diameter venting components

Control Systems:

Analog thermostats: Simple temperature control with a 33-foot cable
Digital thermostats: Precise temperature management
Remote operation: Monitor and adjust from a distance

Safety Equipment:

High-wind vent caps: Prevent back draft in windy conditions
Air recycle systems: Optimize fuel efficiency

Industries Using Heatstar Indirect-Fired Heaters

Construction & Contracting

Concrete curing protection in cold weather
Drywall drying acceleration
Paint booth applications requiring clean air
Worker comfort in enclosed job sites

Agriculture & Farming

Livestock facilities heating
Greenhouse supplemental heat
Grain drying operations
Equipment storage building heating

Oil & Gas Operations

Pipeline construction site heating
Equipment winterization
Temporary facility heating
Remote location heating solutions

Event & Entertainment

Wedding tent heating
Festival venue climate control
Trade show booth heating
Outdoor event weather protection

Emergency & Military

Disaster response temporary heating
Military facility heating
Emergency shelter climate control
Field operation support

Why Choose Heatstar from Cleanflow?

Canadian Warehouse Advantage:

Fast shipping across Canada
Bulk order capabilities for contractors
Local support and technical assistance
Cold weather tested for Canadian conditions

Professional Service:

UL-certified products for safety compliance
Expert sizing consultation available
Complete accessory selection in stock
Volume discounts for multiple unit purchases

Proven Reliability:

Stainless steel construction for durability
Electronic controls for consistent operation
Multi-fuel capability for operational flexibility
Professional-grade components throughout

Get Your Heatstar Indirect Fired Heater Today

Ready to heat your workspace safely and efficiently? Heatstar indirect-fired heaters deliver the clean, powerful heat you need for professional applications.

Free shipping on orders over $199 across Canada. Call our experts at 1-866-335-1078 for sizing assistance and bulk pricing.

Shop the complete Heatstar indirect-fired heater collection at Cleanflow and keep your projects running through the toughest weather conditions in Canada and the USA.

Frequently Asked Questions

What's the difference between direct and indirect-fired heaters?

Direct-fired heaters mix combustion gases with heated air, making them unsuitable for enclosed spaces. Indirect-fired heaters use a heat exchanger to separate exhaust from heated air, producing 100% clean output suitable for occupied spaces.

Can I use an indirect-fired heater indoors?

Yes, Heatstar indirect-fired heaters are specifically designed for indoor use in enclosed or occupied spaces. The sealed combustion system vents all exhaust outside while delivering clean, heated air to your workspace.

What fuel types work with Heatstar heaters?

Most Heatstar diesel heaters accept kerosene, diesel #1 or #2, fuel oil, and Jet A fuel. The HSP400ID-G model offers dual-fuel capability with natural gas or propane options for maximum flexibility.

How much ducting can I use with these heaters?

Heatstar indirect heaters support ducting up to 100 feet, allowing heat distribution across large areas or multiple zones. Proper duct sizing ensures optimal airflow and heating performance.

Are these heaters portable?

Yes, all Heatstar models feature pneumatic or solid rubber wheels for easy job site transport. Larger units include forklift pockets and lift brackets for crane lifting when needed.

Are indirect-fired heaters more efficient than other heaters?

Indirect-fired heaters are slightly less efficient than direct-fired models because some energy is lost through the heat exchanger. However, they provide clean, fume-free air, making them the safer choice for enclosed or occupied spaces. For other heating options, explore our full heater collection to find the right solution for your job site or facility.

Looking for all Heatstar heaters in one place? Explore Cleanflow’s complete Heatstar collection to find direct-fired, indirect-fired, forced-air, radiant, and convection heaters—ready to ship across Canada and the USA.