南京智热节能科技有限公司

Gas-fired hot-air furnace It is a heating and drying device that generates clean hot air through gas combustion. In 2026, domestic industrial heating market environmental regulations will continue to tighten, with the share of retrofit projects replacing highly polluting conventional heating equipment with gas-fired hot-air furnaces increasing by 42% year over year. Meanwhile, a growing number of real-world case studies on gas-fired hot-air furnaces have become key reference points for many companies when making equipment selection decisions. Nanjing ZhiRe Energy-Saving Technology Co., Ltd. With many years of dedicated expertise in the gas‑fired heating sector, we have served over a hundred industrial clients, and detailed information on our projects is available through… Brand Official Website https://www.njwec.com Query, Technical Support Hotline:  +86 18021417801 (same number on WhatsApp).

I. Overall Development Context of the Gas-fired Hot-Air Furnace Industry in 2026

By 2026, industry case studies involving gas-fired hot-air furnaces will exhibit a high degree of scenario-specific segmentation and transparent energy-efficiency data. The prevailing view indicates that, among currently disclosed projects, more than 70% achieve a payback period of under 18 months after retrofitting—significantly shorter than the 2023 average of 30 months.

1.1 Background of Renovation Demand Driven by Industry Policies

In 2026, emission control standards for industrial exhaust gases in many regions will be further refined, and the regulatory hurdles for conventional coal- and oil-fired hot-air equipment will continue to rise. As a result, numerous enterprises with drying and heating needs are proactively seeking alternative solutions, such as gas-fired hot-air furnaces, leading to an explosive increase in implementation cases. The range of targeted sub‑sectors has expanded from just over 20 in the past to more than 50 today.

1.2 Industry Development Trends in the Public Disclosure of Case Data

Case studies in the gas-fired hot-air furnace industry released in 2026 typically include at least three months of continuous, field‑tested operational data, enabling companies to directly benchmark the energy consumption levels of similar projects and estimate the return on investment following their own retrofits, thereby significantly reducing the costs associated with equipment selection and trial‑and‑error.

                             Gas-fired hot air furnace : efficient energy-saving and consumption reducing equipment  for industrial waste heat recovery

II. Typical Real-World Cases of Gas-Fired Hot-Air Furnaces in the Food Processing Industry

Gas-fired hot-air furnaces rank among the top three in terms of application cases across the entire industry, as these projects demand stringent requirements for hot-air cleanliness and temperature stability.

2.1 Application Cases of Gas-Fired Hot-Air Dryers for Fruits and Vegetables

The company primarily engages in the dehydration processing of agricultural products such as king oyster mushrooms and daylilies. Previously, its coal-fired hot-air furnaces generated hot air laden with impurities, resulting in a product pass rate of only 82%. After switching to gas-fired hot-air furnaces, the hot air achieved food-grade cleanliness, boosting the product pass rate to 98% and eliminating monthly coal consumption costs altogether.

2.2 Case Study of a Gas-fired Hot-Air Furnace for Bakery Heating Systems

A major bakery previously relied on electric heating for its thermal supply, but during summer peak‑demand periods, power rationing and production shutdowns were frequent. After upgrading to a gas‑fired hot‑air furnace capable of operating within a 300°C temperature range, the system’s heating stability improved dramatically, unit heating costs dropped by 62%, and the risk of grid‑supply shortages during peak hours was entirely eliminated.

III. Real-World Case Study of Gas-Fired Hot-Air Furnace Retrofit in the Building Materials Drying Sector

Renovation cases of gas-fired hot-air furnaces in the building-materials drying sector typically feature high thermal loads and long continuous operating durations. By 2026, such cases will account for approximately 35% of all retrofit projects, meeting the needs of most brick, tile, and panel‑drying applications.

3.1 Renovation Project for the Gas-fired Hot-Air Furnace Used in Floor Material Drying

A building materials manufacturer previously operated heating equipment with a thermal efficiency of only 58%, resulting in uneven moisture content in dried boards and a low yield of conforming products. After replacing its gas-fired hot-air furnace, the overall thermal efficiency increased to 92%, board‑drying uniformity was improved to within a 0.5% deviation, and production capacity rose by 27% compared with pre‑retrofit levels.

3.2 Application Case of Gas-Fired Hot-Air Furnaces for Drying Gypsum Building Materials

A gypsum board manufacturer previously faced challenges with its heating system, as incomplete combustion of natural gas resulted in exhaust emissions that consistently approached the regulatory threshold. After replacing the existing low‑NOx gas-fired hot‑air furnace, nitrogen oxide emissions were reduced to below 30 mg/m³, fully complying with the latest local environmental standards. The upgraded system has operated continuously for one year without triggering a single environmental warning.

IV. Application Cases of Gas-Fired Hot-Air Furnaces in the Chemical Raw Materials Drying Sector

Gas-fired hot-air furnaces are widely suited to the chemical‑raw-material drying sector, meeting specialized requirements such as explosion protection and precise temperature control. Following compliance verification, these systems can be deployed in most standard applications for drying powdered chemical materials.

4.1 Inorganic Salt Powder Drying Gas-fired Hot-Air Furnace Project

An inorganic salt producer previously relied on conventional heating equipment, which suffered from high heat losses and low drying efficiency. After introducing a gas-fired hot-air furnace directly integrated into the drying line, heat‑losses in the heat‑exchange stage were completely eliminated, boosting overall drying efficiency by 40% and generating annual savings of over RMB 800,000 in heating costs.

4.2 Customized Case of a Gas-Fired Hot-Air Furnace for Drying Coating Raw Materials

In a certain paint manufacturing company, the raw-material drying process requires the hot-air temperature to be maintained steadily at 120°C ± 2°C. Previously, the equipment’s temperature-control deviation exceeded 10°C, frequently leading to material degradation. After installing a custom‑designed gas‑fired hot‑air furnace equipped with an intelligent temperature‑control system, the temperature‑control accuracy improved to ±1°C, completely eliminating the issue of raw-material spoilage.

V. General Operational Procedures for Selecting and Implementing a Gas-fired Hot-Air Furnace Project

The industry generally follows the implementation procedures of established gas-fired hot-air furnace projects, which can effectively prevent issues such as improper equipment selection and non-compliant installation. The standard operating steps are as follows:

1. Conduct on-site surveys to assess the facility’s operating conditions, and collect baseline data, including the enterprise’s actual heat load requirements, the location of available gas connections, and available installation space.

2. Based on benchmark data from gas-fired hot-air furnace industry cases in the enterprise’s sector, select equipment models that match the corresponding power ratings and temperature control ranges.

3. Develop a comprehensive customized solution encompassing piping systems, temperature control systems, and exhaust gas treatment equipment, and prepare a detailed cost‑benefit analysis report.

4. Complete equipment manufacturing and transportation, on-site installation and commissioning, conduct a 48-hour continuous trial run for acceptance, and officially put the system into operation after delivering operational training.

5.1 Key Considerations During the On-Site Survey Phase

During the survey, it is essential to verify the stability of the gas supply pressure in the enterprise’s location and assess the available space for adapting and upgrading the existing drying production line, thereby preventing mismatches between the newly installed equipment and the existing production line.

5.2 Standards for the Acceptance and Delivery Phase – Reference Guidelines

The gas-fired hot-air furnace project shall be delivered only after verifying, based on the technical data of the customized acceptance plan, that the stability of the hot-air temperature under continuous operation, the energy consumption level, and the emission parameters all comply with the agreed-upon standards.

VI. Comparative Analysis of Measured Performance Data for Gas-fired Hot-Air Furnaces Across Different Industries

The table below presents publicly available measured data from selected case studies in the gas-fired hot-air furnace industry, serving as a reference for companies across various sectors when selecting equipment.

According to the 2026 Industrial Heating Industry Research Report, retrofit projects utilizing gas-fired hot-air furnaces achieve an average energy efficiency improvement of 32% compared with conventional heating equipment, aligning with the current national goals for industrial energy conservation and carbon reduction.

6.1 Core Factors Influencing Data Discrepancies

Cost data vary across different gas-fired hot-air furnace industry cases, with the key influencing factors being the local unit price of natural gas, the baseline thermal efficiency of the project’s existing heating equipment, and the continuous operating hours of the production equipment. Enterprises can adjust their calculations based on their specific circumstances.

6.2 Notes on Data Reference

When referencing case data from the gas-fired hot-air furnace industry, prioritize project data that closely matches your own industry and thermal load parameters, and avoid directly adopting parameter settings from other sectors to prevent improper equipment selection.

VII. Key Considerations for Gas-fired Hot-Air Furnace Case Studies

When making selection decisions based on various case studies in the gas-fired hot-air furnace industry, it is essential to focus on several key considerations to prevent suboptimal operational performance down the line.

7.1 Prioritize reference cases from the same region.

Priority should be given to benchmarking against case studies from the gas-fired hot-air furnace industry in the enterprise’s immediate vicinity. Such cases feature gas prices, environmental‑compliance standards, and project-specific conditions that closely mirror those of the target facility, making the resulting input‑output ratios more reliable as a reference. On‑site visits can also be arranged to assess the equipment’s operational status firsthand.

7.2 Prioritize reference cases from the same industry

Prioritize case studies from the gas-fired hot-air furnace industry, as these projects share similar existing heating equipment, production processes, and operating‑condition thermal load parameters, making their descriptions of energy‑efficiency improvements and cost‑reduction ratios more informative. When selecting a service provider, companies should give preference to those with relevant industry experience and proven technical expertise.

Nanjing ZhiRe With more than a decade of dedicated expertise in the heating sector, we have served over a hundred industrial clients and amassed extensive technical experience across numerous industries. For details on relevant product cases, please visit the official website of the Nanjing ZhiRe brand and contact us. , Technical Support Hotline:  +86 18021417801 (same number on WhatsApp).

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