What we cover on a commercial boiler installation

An undersized boiler runs flat out and fails early. Oversized plant cycles, burns more gas than the building needs and ties up capex you could have spent elsewhere. Most of the commercial boiler problems we get called out to started life as a specification decision made in a hurry.

We survey the plant room before quoting. Heat load calculations, flue routes, gas supply capacity, flow rates and physical access for the unit all get checked, then we specify to the building rather than to whatever the merchant has in stock.

Installation, commissioning, Gas Safe certification and handover documentation are all covered, and the same team stays available afterwards for servicing and breakdown cover.

Modern gym with dumbbells, weight plates, punching bag, treadmill, and exercise bike under exposed pipes.

How our commercial boiler installations run

Site walk

We visit, list the assets and agree what needs checking, how often, and at what cost.

Schedule set

The year goes in the diary upfront, with frequencies set per asset rather than per sit

Engineers attend

Your site history arrives with them. Small jobs get done on the visit, not raised as a second booking.

Report issued

Written report after every attendance covering what was done, what was flagged and what needs quoting.

AGEING PLANT AND REPEAT BREAKDOWNS

Once a commercial boiler needs three or four callouts a season, repair spend overtakes replacement value. We assess whether the unit is worth keeping, and where it isn't, quote a commercial boiler installation in London costed against what you're currently spending to keep it limping through winter.

UNDERSIZED OR OVERSIZED SYSTEMS

Buildings get extended, subdivided or change use, and the plant rarely gets revisited. Undersized boilers run flat out and fail early. Oversized ones cycle and waste gas. We run a heat load calculation on the building as it stands now, then specify to that rather than matching the old output.

PARTS OBSOLESCENCE AND FAILED CERTIFICATION

Discontinued units leave you waiting weeks for parts that may not exist. Others fail on flue compliance or gas supply capacity during inspection. Both force the timeline. We cover flue rerouting, gas pipework upsizing and primary pipework replacement as part of the installation rather than as a variation.

SITES THAT CANNOT LOSE HEATING

Hotels, care settings, schools and trading retail can't sit without hot water while plant is swapped. We phase changeovers, run temporary provision where needed, and work evenings and weekends. Commissioning, balancing, Gas Safe certification and controls setup are all completed before we hand back.

Trusted across London and the South East

Who we install commercial boilers for

Retail and hospitality groups, housing associations, managed office buildings, schools, healthcare premises and the facilities management companies procuring on their behalf. Plant rooms in all of them fail at inconvenient times, which is usually when the conversation about replacement finally starts.

Most clients keep us on afterwards through a Priority Account, so the engineers who installed the system are the ones servicing it and attending callouts. Over 25 years across London and the South East, more than 12,000 jobs a year, and over 100 commercial clients on the books.

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What working with us actually looks like

We quote on what the survey found, not on an estimate over the phone. If your procurement team needs documentation, warranty terms or supplier details before approval, say so early and we will have it ready.

Survey before quote

Heat load, flue, gas supply and plant room access all checked on site before a price is issued.

Named specification

Make, model and output in writing, with lead times checked against live stock.

Phased around trading

Changeovers run evenings, weekends or in stages so the building keeps running.

Fixed price, staged payments

No variations unless the scope changes. Payments tied to delivery and commissioning.

Certification and aftercare

Gas Safe certificate and warranty registration on the day, servicing scheduled before we leave.

Why sites replace before the boiler forces the decision

Nobody wants to spend on plant that still runs. The trouble is that failures land in the coldest weeks, when parts are slow and every engineer in London is already booked. Replacing on your timeline means you pick the unit, the phasing and the budget year.

We price commercial boiler installation in London off a completed survey, so the figure you take to approval is the figure you pay. Works are phased around trading, certification is handed over on the day, and servicing is booked before we leave site.

Other commercial services we cover

Every trade below runs as part of a planned programme or as standalone reactive work.

Commercial plumbing

Leaks, burst pipes and washroom systems sorted

Commercial electrical

EICRs, fault finding and emergency lighting

Commercial drainage

Jetting, CCTV surveys and blockage clearance

Heating engineers

Plant room servicing and heating breakdown cover

Boiler installation

New commercial boilers, specified and installed properly

Air conditioning

AC servicing, repairs and full system installs

Commercial roofing

Flat roof repairs, leaks and gutter works

Commercial handymen

Small repairs and fabric jobs, done fast

Refurbishments

Fit-outs and refurbs across occupied commercial sites

Frequently asked questions

How much does commercial boiler installation in London cost?

It depends on output, plant room condition, flue routing and whether the gas supply needs upsizing. We survey first, then issue a fixed price covering supply, installation, removal of the old unit and commissioning, so there are no variations later.

How long does an installation take?

A straight replacement on accessible plant is usually two to four days. Larger systems, cascade installations or jobs needing flue and pipework upgrades run longer. We confirm the programme at quote stage and work to it.

Can you install without shutting the building down?

Usually, yes. We phase changeovers to keep heating and hot water running where the system allows, and arrange temporary provision where it does not. Sites that trade during the day can have the works run evenings or weekends instead.

Do you remove and dispose of the old boiler?

Yes. Strip out, removal and disposal are included in the quoted price, along with making good the plant room. You do not need to arrange separate contractors or waste collection for the redundant plant.

What certification do we receive on completion?

Gas Safe certification, manufacturer benchmark documentation, commissioning records and warranty registration. Everything is handed over as a pack, so your compliance file is complete the day the system goes live rather than weeks afterwards.

Do you work as a subcontractor for facilities management companies?

Regularly. We deliver commercial boiler installation in London for FM providers and larger maintenance contractors, working to their reporting formats, documentation requirements and site access procedures. Unbranded vans are available where the end client relationship requires it.

Do you service what you install?

Yes, and we would recommend it. Annual servicing keeps the manufacturer warranty valid, and having the installing engineers on the servicing contract means faults get diagnosed by people who already know the system and its history.

Wadham Lodge
Kitchener Road
Walthamstow
London
E17 4JP