
300kW trailer mounted boiler hire
A 300kW unit built around ease of delivery. It arrives on its own trailer with the expansion vessel, pressurisation unit and controls already mounted, and runs from a single phase supply.






Boiler down? Emergency hire seven days a week, 365 days a year.
0800 644 6240300kW gas or oil temporary boiler
POA
Priced against the site. Call with the building, the duration and the fuel available and we will specify it.
01782 274537What is a 300kW temporary boiler suitable for?
The 300kW covers larger commercial and industrial buildings where a 250kW would be working at the top of its range for the whole hire. Running a unit permanently at full output is how a temporary installation ends up struggling in the coldest week of the job.
It suits factories, larger schools and colleges, leisure centres, hotels and public buildings, and it is a common specification for a phased plant room replacement where load has to be carried for several months.
- Larger commercial premises
- Factories and industrial units
- Leisure centres and pools
- Hotels and hospitality
- Larger schools and colleges
- Phased plant room replacements
300kW gas or oil boiler features
Designed for delivery
The whole unit was built around getting onto site quickly. It tows behind a standard vehicle and needs no crane where there is a route to the plant room.
Controls already mounted
Expansion vessel, pressurisation unit and the associated controls are part of the trailer, so commissioning is a connection rather than an assembly job.
Gas or oil
Specified either way depending on what the site can supply, which makes it a flexible answer when the fuel position is not settled at quote stage.
Single phase supply
A 16 amp single phase supply is all it needs, so a temporary three phase connection is not part of the cost.
The step above 250kW
Where a 250kW is marginal against the building’s heat load, the 300kW gives headroom without moving to multiple units.
Commissioned on site
Delivered, connected, filled, vented and commissioned by our own engineers, then collected when your permanent plant is back.
Hired with the boiler, burner and a standard pump
Everything else is added to suit the site. We carry the full range, so a connection that needs a plate heat exchanger or a length of fabricated pipework does not become a second visit.
- Flexible hoses
- Bunded fuel tanks
- Flexible gas pipes
- Booster pumps
- Remote plate heat exchangers
- Headers & manifolds
- Pipework adapters
- Custom fabrication of fixed pipework
The 300kW unit



300kW boiler hire: common questions
If yours is not here, ring and ask. You will get a straight answer rather than a callback form.
The trailer carries the boiler, the expansion vessel, the pressurisation unit and the associated controls. Hoses, fittings, pumps and a bunded fuel tank where it is oil fired are added to suit the connection.
No. It is a single phase unit and requires a 16 amp supply, which most sites can provide without a temporary connection.
It depends on your building’s heat load rather than its size. If the permanent boiler coming offline is around 250kW, the 250kW unit will hold it. If it is nearer 300kW, or the building struggles in cold weather as it is, take the headroom. We will size it with you rather than selling you the bigger one by default.
Every unit is hired with the boiler, burner and a standard pump as a minimum. Hoses, bunded fuel tanks, booster pumps, plate heat exchangers, headers, manifolds and pipework adapters are added to suit the connection and quoted with the unit.
Our own engineers, not subcontractors. They deliver, connect, fill, vent and commission the unit, then disconnect, drain and collect it when your permanent plant is back in service.
Enquire about the 300kW gas or oil boiler
Tell us the site and when you need it. If the 300kW is not the right size we will say so and quote the one that is.