Question 1

What are the advantages of hiring an indirect diesel fired heater over a direct fired heater?

Accepted Answer

An indirect diesel fired heater offers several advantages over a direct fired heater, particularly when you need clean, safe and controlled heat in enclosed or sensitive environments.

Advantages of indirect diesel fired heater vs direct fired heaters include:

1. 100% fume-free warm air

Indirect units use a sealed combustion chamber and heat exchanger, so all exhaust gases are vented outside. Only clean, warm air enters the workspace. Direct fired heaters release products of combustion into the same areas they heat, making them unsuitable for many occupied or poorly ventilated spaces.

2. Safe for enclosed and sensitive environments

Because there’s no exposure to fumes, odours or combustion by-products, indirect heaters are recommended:

Warehouses and workshops
Marquees and events
Construction welfare areas
Food and beverage environments
Manufacturing and processing spaces

Direct fired heaters generally require high ventilation rates and are often restricted in these applications.

3. Better moisture control

Indirect heaters blow out dry heat, helping to manage humidity and air processes like curing, drying or climate-sensitive manufacturing. Direct fired heaters add water vapour into the air as part of the combustion process.

4. More efficient heat distribution

Indirect heaters support long duct runs, allowing warm air to be distributed exactly where it’s needed. This helps maintain consistent temperatures across larger or more complex spaces.

5. Improved worker comfort and compliance

Cleaner air, lower odour and lower humidity help create a safe, more comfortable environment, supporting health and safety compliance and improved productivity.

6. More suitable for critical or high-risk applications

Any environment where product contamination, air quality or safety is a concern will benefit from indirect technology. That includes construction drying projects, temporary structures, emergency heating and controlled industrial environments.

Question 2

How quickly can the heater be delivered, installed and operational on-site?

Accepted Answer

We can have an IDF heater delivered, installed and fully operational within hours, depending on your location and site conditions.

Our team mobilises quickly because temporary heating is often a time-critical requirement. We handle everything – from transport and positioning to ducting, flue installation and fuel integration – ensuring a safe, compliant setup from the outset.

Where a site survey is required, we move fast. Our engineers assess the space, confirm the correct heater size and airflow, and design the most effective layout before installation begins.

Once on site, commissioning is immediate. We verify performance, run safety checks and make sure your team is comfortable with system operation. With remote monitoring and 24/7 support included, you can be confident your heating solution will stay online and performing optimally from day one.

Question 3

What maintenance, monitoring and support services are offered during the hire period?

Accepted Answer

Throughout the hire period, Aggreko provides a fully managed service designed to keep your heating solution running safely, efficiently and without interruption. This includes:

Proactive maintenance built into the hire
All service is scheduled and carried out by our engineers, ensuring the heater, ducting, fuel system and controls continue to perform as specified. Any wear, filter changes or operational adjustments are handled quickly and professionally.

Continuous performance oversight with remote monitoring
ARM lets our specialists track fuel levels, operating hours, performance trends and system alarms in real time. If something needs attention, we act before it affects your operation, minimising downtime and improving fuel efficiency.
24/7 technical support and rapid response

Our team is available around the clock. Whether you need operational advice, a performance adjustment or a site visit, support is always on hand. For critical environments or extreme weather, this ensures you are always protected.
Responsibility for reliability and compliance

We manage safety checks, system optimisation and all operational upkeep, freeing your team from the burden of heater maintenance. You get a stable, compliant heating solution without any additional workload.

In short, hiring from Aggreko means you’re gaining a dedicated technical partner focused on keeping your site warm, safe and productive.

Question 4

What are the safety, compliance and environmental considerations?

Accepted Answer

When you deploy an IDF heater, safety, compliance and environmental performance must be built into every stage – from system design through to day-to-day operation. Aggreko’s approach is shared around ensuring your site meets the highest standards while delivering reliable, fume-free heat.

Safety considerations include:

Separate combustion from the air stream and venting exhaust gases outside, making them suitable for enclosed, sensitive or people-occupied environments.
Correct flueing and ducting to control heat distribution while protecting personnel and equipment.
Built-in safety controls, such as high-temperature shutdowns, flame-failure protection and robust fuel management systems, to ensure the heater operates safely under changing site conditions.
On-site commissioning and checks before handover. Aggreko specialists confirm airflow, temperature, fuel integration and emergency shut-off systems meet requirements.

Compliance considerations include:

Adherence to industry standards through designs that comply with relevant health, safety and environmental regulations, including heating requirements for temporary structures or construction environments.
Documented procedures and certification, including risk assessments, method statements and commissioning records, to stay audit-ready and compliant.
Suitability for regulated industries, such as food and beverage, manufacturing, healthcare and pharmaceuticals, by delivering clean, dry air.

Environment considerations include:

Cleaner combustion and reduced emissions by using efficient burners and high-quality filtration to lower particulate and NO_x emissions.
Improved fuel efficiency through correct sizing, high-efficiency heat exchangers and remote monitoring.
Low-noise operation and careful placement minimise disruption, supporting environmental and community considerations.

Question 5

What happens at the end of the hire period? How is removal/decommission handled?

Accepted Answer

At the end of your hire period, Aggreko manages the full decommissioning and removal process so your site can return to normal quickly, safely and without disruption.

Once your heating requirement is complete, simply let us know your preferred off-hire date. We’ll confirm final operating details, check fuel status and schedule the removal at a time that works for your site.

Loading component...

Indirect diesel heater hire

A specialist industrial indirect fired heater rental service