Installer status
Vaillant Advance Installer
Manufacturer training programme. Qualifying installations may carry protection up to 10 years, depending on eligible model, current promotion, installation and registration conditions.
Boiler installation · London
Boiler Installation London.
Correctly specified boilers, a full-system powerflush and manufacturer-backed commissioning, from a Gas Safe registered team with 16 years of London heating experience.
Installation appointments available from as little as 48 hours, subject to survey, product and engineer availability.
16years’ London heating experience
48happointments from*
100%full-system powerflush included
7–12years’ manufacturer protection†
*Subject to survey, stock and engineer availability. †Protection range depends on brand, model, accessories and current promotion — see Manufacturer protection below.
Credentials that matter
Approved knowledge. Registered installation.
Manufacturer training helps us specify and commission the right appliance for the property. Gas Safe registration confirms the gas work itself is carried out by a qualified, registered engineer — which also means genuine parts, accurate fault diagnosis and the correct paperwork behind any manufacturer protection you are relying on.
Installer status
Viessmann Trained Installer
Manufacturer training programme. Qualifying installations may carry 7, 10 or up to 12 years’ protection, depending on model, accessories, current promotion, installation and registration conditions.
Registered business
Gas Safe No. 520933
Pure Energy Project Ltd is a Gas Safe registered business. Registration confirms the gas work on your installation is carried out by a registered engineer.
Manufacturer accreditation profile links will be added once PEP's exact manufacturer profile URLs are confirmed.
System-first installation
A new boiler is only as good as the system around it
Replacing the appliance is the easy part. Long-term reliability depends on correct sizing, clean system water, suitable controls and precise commissioning.
Before installation, we check the existing gas supply and pipework against the new appliance's gas rate, confirm a compliant flue route and termination position, and assess the condensate route — including trap and pump requirements on longer or external runs. Radiators and any cylinder are reviewed for condition and compatibility, alongside water quality and the property's existing controls.
That assessment carries through to commissioning. Once the boiler is installed, we test combustion performance, gas rate, flow temperatures and safety devices, then record the results — so the system is proven to work as a whole, not just switched on and left.
See exactly what we include See our central heating and plant room installation work See our Chelsea boiler installation pageDedicated service page plannedPowerflush London
Included as standard
Everything a proper replacement requires.
No headline price built around shortcuts. The installation scope starts with what your new boiler and heating system actually need.
Technical survey
Heat loss, hot-water demand, existing controls, gas supply, flue route and condensate are reviewed before the boiler is specified.
Full powerflush
Every replacement includes a full system powerflush as standard, to remove sludge and debris before the new boiler is commissioned.
System protection
A magnetic filter, fresh inhibitor and water-quality checks help protect the heat exchanger and preserve performance.
Controls review
We match the boiler to suitable controls and explain how to get the best from the system, without unnecessary complexity.
Commissioning
Combustion, gas rate, flow temperatures and safety devices are tested and recorded before the installation is handed over.
Warranty registration
PEP registers the qualifying manufacturer protection confirmed in your quotation and provides the installation paperwork.
Correctly specified
The right boiler type, not simply the familiar one.
We recommend the arrangement that suits the building, the available space and the real hot-water demand.
See our plumbing installation and upgrades workCompact · instant hot water
Combi
A strong choice where space is limited and hot-water demand suits a single appliance. Output is matched to the property's flow rate and simultaneous use — a shower and a kitchen tap running together, for example.
Cylinder · higher demand
System
Suited to homes that need stored hot water, multiple outlets and a well-balanced heating circuit. We specify vented or unvented cylinder capacity to match bathroom count and typical demand, not a default size.
Traditional · adaptable
Heat-only
A considered replacement for compatible open-vented systems, with upgrades — a new cylinder, additional controls or thermostatic radiator valves — specified only where they add value.
The PEP standard
Technical enough to get it right. Clear enough to make sense.
We do not disappear after fitting the appliance. Your engineer tests the installation, records the result and explains how the controls and heating system should be used — a plain-English handover covering what was done, what to check, and who to call if anything needs attention.
01 Protect the property02 Test and record03 Explain the system
From enquiry to handover
A clear route to a warmer, more reliable system.
01
Assess
We establish what the property and heating system actually need — reviewing photographs, access and the existing system remotely first, then on site where required.
02
Specify
You receive a clear recommendation, a fixed scope and the applicable manufacturer protection in writing, so there are no surprises once work begins.
03
Install
Our engineers protect the working area, remove the old appliance, clean the system and complete the installation, testing as they go rather than only at the end.
04
Commission
We test, balance, explain and register the work, so the system is ready to perform from day one.
Manufacturer protection7–12years
Protection included in the quoted installation
Long-term confidence, registered by PEP.
Depending on the selected model, qualifying accessories and current manufacturer promotion, protection can range from 7 to 12 years.
VaillantQualifying installations up to 10 years, depending on eligible model, current promotion, installation and registration conditions.
Viessmann7, 10 or up to 12 years, depending on model, accessories, current promotion, installation and registration conditions.
Manufacturer-backed guarantee is included as standard where the selected product and promotion qualify; it is not automatic on every model. The exact protection applicable to your installation is confirmed in your quotation, and manufacturer terms, model eligibility, qualifying accessories and servicing requirements apply.
When timing matters
Boiler installation appointments from as little as 48 hours.
Send us the boiler details, a few photographs and your postcode. We can usually establish the likely scope quickly and arrange the next suitable survey or installation slot.
Start your enquiry *Subject to survey, stock and engineer availability.Boiler installation FAQs
Useful answers before you request a quote.
Still unsure which route suits your property? Speak directly with the PEP team.
07825 268 434How quickly can you install a new boiler?
Subject to survey, product availability and engineer capacity, installation appointments can be available from as little as 48 hours after your enquiry.
Is a powerflush included?
Yes. A full system powerflush is included as standard with every PEP boiler replacement, along with inhibitor dosing and a water-quality check before handover.
Which boiler brands do you install?
We are a Vaillant Advance Installer and a Viessmann-trained installer. We recommend the model that best matches your property, hot-water demand and existing system.
How long is the manufacturer protection?
Depending on the brand, model, qualifying accessories and current promotion, protection can range from 7 to 12 years. Vaillant options extend up to 10 years; selected Viessmann options may qualify for 7, 10 or 12 years. Terms apply.
How long does the installation take?
Many straightforward replacements are completed within one working day. Changes to boiler type, location, flue route or system configuration can take longer — your quotation sets this out clearly.
Do you register the installation?
Yes. We complete the commissioning documentation, register the qualifying manufacturer protection and arrange the Gas Safe notification where applicable.
Ready when you are