Seasonal compressor hire for campaigns and summer peaks

When does seasonal hire make sense?

Many plants and contractors need more air at certain times of year, but not all year round. Buying a permanent compressor for a few months of demand ties up capital and floor space, and the machine may run lightly loaded for the rest of the year. Seasonal hire fills the gap for as long as it is needed.

Typical seasonal situations in Telangana, Andhra Pradesh and across India include:

• Agro-processing campaigns: rice mills, cotton ginning and spinning, sugar, seed processing and cold chains, which run harder after harvest.
• Construction and infrastructure windows before the monsoon, when contractors push breakers, rock drills and blasting work.
• Borewell drilling, which peaks in the dry months before the rains.
• Summer, when high ambient temperatures reduce compressor and dryer capacity at the same time as cooling and process demand rise.
• Festive-season production peaks in packaging, beverages and consumer goods.

Seasonal hire differs from short peak-demand hire, which covers bursts lasting hours or days, and from long-term hire, which may run for a year or more. See peak demand rental and long-term hire.

Is it more demand or less supply?

“We need more air every summer” is an observation, not a specification. Find out why. Two quite different causes produce the same symptom of low pressure.

Often two causes act together: demand rises just as available capacity falls. Hiring compressors will not fix a dryer that cannot handle summer moisture, and hiring a dryer will not fix a capacity shortfall. Measure first.

Build a seasonal record of demand and capacity

The best seasonal plan comes from last season’s data. If you have flow meters, use them. If not, compressor load and running hours, pressure logs and production records give a reasonable picture. Record for the season:

• Average and peak flow, and when the peaks occur.
• Pressure at the compressor and at the critical users.
• Ambient temperature and compressor room temperature at the hottest time of day.
• Discharge temperature and any high-temperature trips.
• Pressure dew point after the dryer and any water complaints.
• Any breakdowns or stoppages, and their causes.

Our metering and usage management page explains how temporary metering can fill gaps.

Calculate the seasonal shortfall

The size of the hire is the difference between the demand that must be met and the capacity that will really be available during the season. Work it out like this:

1. Take the peak sustained demand for the season, in cfm or m³/min, at the required pressure.
2. Take the free air delivery of the permanent compressors at that pressure.
3. Reduce it for any expected derating at high ambient temperature and for dryer purge if heatless desiccant dryers are used, since they consume a significant share of the dried air.
4. Remove the largest permanent machine if you need cover for its failure during the season.
5. The difference is the shortfall; the hired capacity should cover it with a sensible margin.

As an illustration, if a plant needs 1,400 cfm at 7 bar (101.5 psig) during its campaign, and its permanent machines deliver 1,200 cfm in normal weather but less on the hottest afternoons, a 400–600 cfm hired compressor may cover the shortfall with margin. If the plant also wants cover for its largest machine failing, the hired capacity must be larger.

Avoid sizing on a single season-wide maximum if demand varies a lot. Specify phases instead: ramp-up, peak and tail. A smaller unit may cover the tail, and the larger one can be released early.

Plan for heat, moisture and dust

Indian seasons are hard on compressed air. In April–June, ambient temperatures of 40–45 °C are common in much of Telangana and Andhra Pradesh, and above 45 °C on open sites. Oil-injected screw compressors normally run with a discharge temperature of about 75–95 °C; hot compressor rooms and dirty coolers push it towards the shutdown point.

In the monsoon, warm humid air carries much more water. A refrigerated dryer delivering a typical pressure dew point of about +3 °C in normal conditions may struggle if the inlet air is hotter than its design point. Desiccant dryers need their prefilters and drains working well.

For the season:

• Clean coolers and check ventilation before the hot months, not after the first trip.
• Place hired compressors where they get cool air and do not recirculate hot exhaust.
• Check whether the existing dryer can handle the combined flow and the season’s inlet conditions; if not, hire a dryer with the compressor. See dryer service and dew-point performance.
• Check condensate drains; their load rises sharply in humid months.
• On dusty sites, plan more frequent filter and cooler cleaning.

Book and mobilise before the season starts

Seasonal demand is predictable, so the hire should be too. Many contractors and plants need extra air at the same time, especially before the monsoon. Work backwards from the date air must be available:

1. Confirm the duty and the shortfall a few weeks before the season.
2. Agree the scope: compressors, dryers, hoses, generators, operators and servicing.
3. Prepare the site: position, ground, power or fuel, tie-in point.
4. Deliver and install before production depends on the air.
5. Commission under realistic load and accept the system.

Leave time for a test run. A compressor that arrives the day the campaign starts leaves no room to fix a tie-in leak or a power problem.

Decide start, extension and release by triggers

Seasons rarely start and end on fixed dates. Harvests come early or late, rains arrive early, campaigns run over. Instead of fixed dates only, agree triggers:

• Start: when production reaches a certain level, or a fixed date before the expected peak.
• Extension: when demand at the planned end date is still above what the permanent plant can supply.
• Release: when the permanent system has carried the remaining duty for a set period without the hired machine.

Weigh early release against remobilisation. Releasing a machine a week early saves hire time, but if demand returns and a machine has to be brought back, transport and installation are repeated.

Run the season smoothly

During the season, coordinate permanent and hired compressors so they do not fight each other. Set pressure bands so that one set of machines leads and the other follows, and avoid several machines running unloaded at once. Unloaded running wastes power or fuel.

Keep a short daily log: hours, pressure, temperature, dew point, fuel use and any alarms. Service hired machines at the agreed interval; on our hire jobs that is every 300 running hours. Plan servicing for quieter shifts so that cover is not reduced at the peak.

At the end of the season, review the log. It tells you whether the hire was the right size, whether the dryer was adequate and whether next season’s plan should change, including whether a permanent machine would now be the better answer. Our rental versus ownership calculator helps with that comparison.

How Reddy Compressors helps

We are an independent multi-brand compressor specialist based at Tarnaka, Secunderabad, serving industry since 2002. We sell, rent and service ELGi, Atlas Copco, Ingersoll Rand, KAESER, Chicago Pneumatic, Doosan and other makes; we are not an authorised dealer. We have tie-ups with all major and reputed brands. Our own rental fleet covers 50–2,000 cfm at 2–30 bar, diesel and electric, oil-injected and oil-free.

For seasonal hire we:

• Help you work out the shortfall from your records or temporary metering.
• Supply compressors, dryers, hoses and, through Reddy Generators under the same management, generators.
• Install and commission before the season, and service machines every 300 running hours.
• Provide operators for round-the-clock duty where needed.
• Review the season with you and advise whether hire, a used machine or a new machine suits next year.

More than 20 service engineers and technicians cover the whole of Telangana and Andhra Pradesh, and we supply rentals across India.

What to send us

• The season, its expected start and end, and how it usually varies.
• Required flow and pressure, and the air quality your process needs.
• Details of your permanent compressors and dryers: make, model, rating.
• Any records from last season: pressure, temperature, trips, water problems.
• Site location, space for a hired machine and available power.
• Whether you need operators or standby cover.

Frequently asked questions

Can I hire an air compressor just for a few months?

Yes. Seasonal hire is designed for that. You hire the capacity for the period you need it, with treatment, hoses and servicing as agreed, and return it when the permanent system can carry the duty again. Agree start, extension and release triggers so the hire matches the real season rather than fixed dates alone.

Why does my compressor lose pressure every summer?

High ambient temperature raises compressor discharge and room temperature, which can cause derating or high-temperature trips. Dirty coolers and poor ventilation make it worse, and demand often rises at the same time. Check discharge temperature, room temperature and cooler condition before hiring capacity; sometimes cleaning and ventilation fix part of the problem.

Do I also need to hire a dryer for seasonal hire?

Often, yes. If the hired compressor feeds into the existing dryer, the combined flow may exceed its rating, and humid monsoon air or hot summer inlet air reduces its capacity further. Check the dryer’s rating against the total flow and the season’s conditions; if it falls short, hire a dryer sized for the added flow.

How early should I book seasonal compressor hire?

Book once the duty is clear and well before the season starts, because many users need extra air at the same time, especially before the monsoon. Allow time to prepare the site, deliver, install and test the system under load before production depends on it. Leaving it to the first day of the season leaves no time to fix problems.

Is it cheaper to hire every season or buy a compressor?

It depends on how many months a year you need the capacity, your utilisation and how the machine would be used the rest of the year. Short, predictable seasons usually favour hire. If the seasonal machine would also cover standby or growth, buying a new or used compressor may make sense. Compare total cost, including energy, over several years.

Should the hired compressor run alongside my existing ones?

Usually, yes, but set the pressure bands so that one group leads and the other follows, and avoid several machines running unloaded together, which wastes power or fuel. Check that the tie-in point and distribution can carry the combined flow without excessive pressure drop, and agree who operates and logs the hired unit.

Related pages

• Temporary air engineering centre
• Peak demand rental
• Own the base, rent the peak
• Long-term hire
• Metering and usage management
• Temporary air hire or buy