Thermokrupp | Industrial Boiler Manufacturer
Hot Air Generator Manufacturer
Premium Hot Air Generator Manufacturer in India | Up to 600°C
A hot air generator (HAG) heats fresh air and delivers clean, dry, controlled hot air straight to your dryer, oven or curing line. As a Hot Air Generator Manufacturer in India, Thermokrupp Boilers builds custom-engineered, energy-efficient industrial hot air generators for drying, curing, baking and sterilisation, with outlet temperatures from 100°C to 600°C.
What Is a Hot Air Generator (HAG)?
A hot air generator (HAG) is an industrial heating system that heats air by burning a fuel (gas, oil, biomass or coal) or by electric heating, and delivers clean, dry, high-temperature air to your process. In an indirect-fired unit the flame and flue gas stay inside a heat exchanger, so the air reaching your product is uncontaminated. That makes it essential for food, pharma, textile and chemical industries.
Typical uses include tray dryers, fluid bed dryers, spray dryers, textile stenters, spice and agro drying, baking ovens, paint and powder-coating curing, rubber and plastic drying, and plywood and veneer drying.
Technical Specifications: TK-HAG Series
| Model | Air Output Temp | Fuel Type | Heat Exchanger Material | Max Airflow (CMH) |
|---|---|---|---|---|
| TK-HAG-300 | Up to 300°C | Gas / Diesel | Mild Steel / Corten | 5,000 – 12,000 |
| TK-HAG-450 | Up to 450°C | Oil / Gas / Biomass | Stainless Steel (SS304) | 8,000 – 20,000 |
| TK-HAG-600 | Up to 600°C | Biomass / Coal / Oil | Stainless Steel (SS316) | 15,000 – 30,000+ |
*Ranges are indicative. Every system is finally designed around your temperature, airflow and fuel. Contact our engineering team for a tailored design.
Industrial Hot Air Generator Buyer’s Guide: How to Select the Right System
The right hot air generator affects energy use, product quality and running cost. Start with two numbers: airflow (CMH) and temperature rise (Delta T).
1. Core Metrics: CMH and Delta T
CMH (cubic metres per hour) is the volume of air your process needs. Delta T is the outlet temperature minus the ambient inlet temperature. Getting both right prevents fuel waste and production bottlenecks.
2. A Quick Sizing Formula
As a rule of thumb, heat required (kcal/hr) ≈ CMH × 0.29 × Delta T. For example, heating 10,000 CMH of air from 30°C to 180°C (Delta T of 150°C) needs about 10,000 × 0.29 × 150 = 4,35,000 kcal/hr, which is roughly 506 kW. Add a margin for losses, and we will finalise the size with you.
3. Direct-Fired vs Indirect-Fired
Indirect-fired HAG: contamination-free air, ideal for food, pharma and chemicals. Direct-fired HAG: very high efficiency, suited to construction and non-sensitive drying.
4. Fuel Source Selection
Gas and oil give tight, precise temperature control. Biomass and other solid fuels can cut running cost substantially where the fuel is cheap and local. Compare fuels by cost per 1,000 kcal of useful heat, as explained in our industrial heating system guide.
5. Material & Durability
Up to about 300°C, corten steel is common. From 300°C to 600°C, SS304 or SS316 heat exchangers give longer life.
📋 Pre-purchase checklist: required outlet temperature, airflow (CMH), application type, fuel availability, and installation space.
Thermokrupp industrial hot air generator: indirect and direct fired designs for clean, uniform heat.
High-Efficiency Burner
Controlled combustion on diesel, gas, biomass or coal for dependable heat with low emissions.
Advanced Heat Exchanger
SS304 / SS316 construction for indirect heating: clean air with no combustion contamination.
Direct-Fired vs Indirect-Fired Hot Air Generators
⚡ Direct-Fired HAG
Combustion gases mix with the process air. Efficiency is typically 99–100%. Suited to curing, space heating and non-critical drying, with a lower initial cost.
🌿 Indirect-Fired HAG
Clean, uncontaminated hot air through a heat exchanger. Efficiency is typically 85–92%. Needed for food, pharma and chemicals.
⚙️ Thermokrupp advantage: both configurations are available. Indirect models use SS316 heat exchangers for sensitive production lines.
Key Benefits of Our Industrial Hot Air Generators
✔ High-Temperature Output
Up to 600°C with no steam pressure to manage.
✔ Energy Efficient
Low fuel consumption and minimal heat loss.
✔ Uniform & Precise Heating
Consistent temperature across the drying chamber.
✔ Moisture & Dust-Free Air
Clean process air in indirect-fired designs.
Why Choose Thermokrupp as Your Hot Air Generator Manufacturer?
Custom-Built
Capacity, fuel and temperature tailored to your process.
Quality Materials
Corten, SS304 and SS316 heat exchangers chosen for your temperature.
Safety-First Design
Burner flame supervision and over-temperature protection (details per model).
Explore More Industrial Heating Solutions
Complete your system with our industrial fans, industrial chimneys and dust collectors. Not sure whether you need hot air, thermic oil, steam or hot water? Read our industrial heating system guide or the hot water generator guide.
Industries We Serve
Questions to Ask Before You Buy a Hot Air Generator
- What outlet temperature and airflow (CMH) is the unit rated for, and at what ambient inlet temperature?
- Is it direct or indirect fired, and what is the heat exchanger material and thickness?
- What is the tested thermal efficiency on my fuel?
- Which safety devices come as standard (flame failure, over-temperature cut-off, fan interlock)?
- What does the quote include: fan, ducting, chimney, control panel, installation?
- What are the warranty terms, in writing, and what does the AMC cover?
For a neutral benchmark on energy performance, see the Bureau of Energy Efficiency. Our factory at Bisnoli, Dadri, Gautam Budh Nagar is close to Noida, Greater Noida and Ghaziabad, so for Delhi NCR plants we can visit your site, check your process and layout, and supervise installation. We supply across India. Learn more about Thermokrupp.
Hot Air Generator Manufacturer: Your Top Questions Answered
1. What certificates and test documents should a hot air generator manufacturer provide?
Ask any hot air generator manufacturer for copies of its quality certificates and the test records for your equipment before you order, and check that each certificate is valid and issued in the manufacturer’s own name.
We share the documents that apply to your equipment, such as material test certificates and burner and control documentation, with the proposal. Tell us which documents your plant needs.
2. Are you a direct manufacturer or just a supplier or trader?
Thermokrupp is a direct manufacturer, not a trader. We design and fabricate our systems at our facility in Dadri, Gautam Budh Nagar.
Why this matters: direct manufacturing gives you one point of responsibility for design, fabrication, installation and service, and no middleman margin.
3. Can you manufacture a custom hot air generator for my application?
Yes. Customisation is our core strength. We engineer each system to your process rather than selling a standard box.
- Temperature: 100°C to 600°C (higher on request)
- Fuel: biomass, coal, diesel, natural gas, LPG or multi-fuel
- Airflow: 500 CMH to 50,000+ CMH
- Material: MS, SS304 or SS316 heat exchangers
- Mounting: horizontal, vertical or skid-mounted
Send us your requirements and we will prepare a general arrangement (GA) drawing for your approval.
4. What is the typical manufacturing lead time for a custom HAG?
Typical lead times depend on the design and materials, and we confirm the exact date when you place the order:
| System Type | Typical Manufacturing Time |
|---|---|
| Standard design (300°C) | 4-5 weeks |
| Custom engineered (450°C) | 6-8 weeks |
| High temperature (600°C) / special alloy | 8-10 weeks |
Need it faster? Talk to our engineers about expedited options based on material availability.
5. Why choose a direct manufacturer instead of a supplier or trader?
Buying direct removes the distributor and trader margins that build up in a factory, distributor, trader, buyer chain. It also gives you one team accountable for design, fabrication, installation and after-sales service.
Plus: warranty terms, scope of supply and lead time are stated in writing in your quotation, so you know exactly what you are buying.
6. What after-sales support do you offer?
Because we are the manufacturer, support does not get outsourced. We provide:
- On-site installation supervision
- Operator training
- Remote troubleshooting via video call
- Prompt spare parts dispatch
- Annual Maintenance Contracts (AMC)
- Performance tuning after commissioning
You speak directly to our engineers when you call.
7. Does a hot air generator need IBR approval?
A hot air generator heats air, not steam, so it is generally not a boiler under the Boilers Act, 2025 and does not need IBR certification. A system that also includes a steam or pressurised hot water section is different. We confirm the regulatory status of your specific model in writing, and you can check with your state boiler inspectorate if you are unsure.
Still have questions? Compare options in our industrial heating system guide, or talk to an engineer.
🏭 Speak to Our EngineersDetailed quote within 24 hours | Free technical consultation
Get Your Custom Hot Air Generator Solution
Complete the form below or call us for a detailed quotation and free technical consultation.
Submit Your Requirements
Please include required temperature, airflow (CMH), fuel preference and your application.
📞 Call: +91 85109 23806
+91 99119 35013
✉️ Email: sales@thermokruppboilers.com
🏭 Factory: Kh No -12, Bisnoli, Tehsil – Dadri, Gautam Budh Nagar, UP 203207
📌 24-hour response | Free technical consultation | Pan-India supply