Boiler installation · Worcester Bosch & Vaillant accredited
Boiler installationin Edinburgh with a10-year guarantee
Worcester Bosch and Vaillant boilers specified to your home rather than a call-centre script, installed by a Gas Safe registered engineer with 20+ years on the tools, and backed by a 10-year manufacturer guarantee on the boiler plus 12 months on our workmanship.
Accredited installer · Gas Safe registered · Price agreed before we start
10 years
Guarantee as standard on the boiler
Accredited
Worcester Bosch and Vaillant installer
Gas Safe
Registered engineer, every installation
20+ yrs
Experience specifying and fitting boilers
12 months
Workmanship guarantee on the installation
The service
The right boiler,sized for your house
What it covers
A boiler installation is a system decision, not a product purchase. It covers survey and heat-loss assessment, choosing between combi, system and regular boilers, flue routing, gas supply sizing, condensate discharge, system cleansing and inhibiting, controls, commissioning to manufacturer specification, Gas Safe notification and warranty registration. We install Worcester Bosch and Vaillant as an accredited installer, which is what allows the 10-year guarantee to be issued.
Who it's for
For Edinburgh homeowners replacing a boiler that has become unreliable or expensive, converting from a tank-and-cylinder setup to a combi, or specifying heating for a renovation. Also for anyone who has been quoted a boiler over the phone by an output figure and wants someone to look at the actual property first.
When you need it
Replace on your terms rather than the boiler's. The signals are repeated breakdowns, parts becoming hard to source, an appliance past roughly 12–15 years, rising gas bills for the same comfort, or a lockout fault that keeps returning. Planning an install in spring or summer means you choose the date rather than waiting without heating in February.
Why it needs doing properly
Getting this wrong is expensive in ways that only appear later. An oversized combi short-cycles, wears itself out and never runs efficiently. An undersized one cannot deliver a decent shower. A flue in the wrong position breaches manufacturer and building regulation clearances. Installing onto a dirty system voids warranties and blocks the new heat exchanger. Accredited installation exists precisely because the manufacturer will only stand behind ten years of an appliance that was specified and commissioned properly.
Leave it and it grows
What a badlyspecified boiler costs
The cheapest installation quote and the cheapest decade of ownership are rarely the same thing. The difference shows up in warranty claims, in gas bills and in showers that never quite work.
What it costs if ignored
- An oversized boiler cycles on and off constantly, which wears components faster and wastes gas on every start.
- An undersized combi cannot supply two outlets, so the shower drops to cold whenever the kitchen tap runs.
- Installing onto an uncleansed system pushes existing sludge into a brand-new heat exchanger and can void the manufacturer guarantee.
- Incorrect flue termination or clearance is both a regulation failure and a safety issue.
- Undersized gas supply pipework causes the boiler to underperform and lock out under load.
- An unregistered installation leaves you with no Gas Safe notification, no manufacturer warranty and a problem at the point of sale of the house.
Common mistakes we're called out to
- Choosing a boiler by kW output alone with no heat-loss assessment of the actual property.
- Assuming a combi suits every home, a house with two bathrooms and low mains flow often does not.
- Skipping the system cleanse and filter to bring the quoted price down.
- Keeping old, blocked radiators and an unbalanced circuit and expecting a new appliance to compensate.
- Accepting a price given over the phone without anybody seeing the flue route or gas run.
- Forgetting to register the warranty, which quietly turns a ten-year guarantee into none.
Our process
How the job runs,step by step
Step 1
Survey and heat-loss assessment
We look at the property, the existing system, radiator sizing, mains water flow and pressure, gas supply, flue route and condensate options; because all of those determine which appliance is correct.
Step 2
Specification and agreed price
You get a clear recommendation with the reasoning behind it, the alternatives where they exist, and a price agreed before any work begins.
Step 3
Installation
Old appliance safely removed, new boiler installed with correct gas sizing, flue routing to manufacturer clearances, condensate run and a magnetic filter fitted on the return.
Step 4
Cleanse and protect
The system is cleansed and dosed with inhibitor so the new heat exchanger is not immediately fed with old debris. Where the system is heavily contaminated we will recommend a power flush.
Step 5
Commissioning and testing
Commissioned to manufacturer specification, gas rate and combustion checked, controls set, system balanced and every radiator verified under load.
Step 6
Registration and handover
Gas Safe notification completed, manufacturer guarantee registered on your behalf, and a walkthrough of the controls before we leave. 12-month workmanship guarantee on top of the boiler's cover.
What you get out of it
Specific outcomes,not vague promises
Ten years of cover
A 10-year manufacturer guarantee as standard on the boiler, which is only available through accredited installation.
Correctly sized
Specified against the property's actual heat loss and mains performance, so it heats and delivers hot water without short-cycling.
Protected from day one
System cleansed, inhibited and filtered, which is the difference between a heat exchanger that lasts and one that blocks.
Compliant and notified
Gas Safe registered installation, correct flue clearances and full notification; which matters when you sell the house.
Predictable cost
The price agreed after a survey, not a number guessed over the phone and revised on the day.
One accountable installer
Owner-led work from Lewis Bowman, so the person who specified the system is the person who commissioned it.
In detail
Boiler types, fluesand Edinburgh properties
Which boiler is right depends on the building, the water supply and how the household actually uses hot water. These are the variables we assess before recommending anything.
Combi boilers
Heat water on demand with no cylinder, which frees up cupboard space and suits flats and homes with one bathroom and good mains flow. Performance is limited by incoming mains flow rate, so a property with poor mains pressure will not get a good shower from a combi regardless of its kW rating. We measure flow and pressure rather than assuming.
System boilers
Work with an unvented or vented cylinder and suit larger homes and households running more than one bathroom at once. Stored hot water means simultaneous outlets are not fighting each other, and the expansion vessel and pump are built into the appliance.
Regular (heat-only) boilers
Retain the feed and expansion tank and hot water cylinder, and are often the right answer in older Edinburgh properties where the existing pipework, gravity circuits or low mains pressure make a combi conversion expensive and unnecessary.
Flueing and siting
Flue routing has to meet manufacturer clearances from windows, doors, boundaries and openings. Tenement and terraced properties often constrain where a boiler can go, which can mean a horizontal flue, a vertical run, or relocating the appliance. This is exactly why a survey precedes a price.
Controls and efficiency
Modern boilers work best with proper controls: programmer, room thermostat, TRVs, cylinder stat where relevant, weather or load compensation where supported. Correct control setup and a low return temperature are what let a condensing boiler actually condense, which is where the efficiency figure comes from.
What goes with the install
Magnetic filter on the return, system cleanse and inhibitor dose, condensate route planned to avoid freezing on an external run, gas pipework upgraded where the existing supply is undersized, and any radiator or valve corrections identified at survey rather than discovered mid-install.
Questions
Boiler Installationquestions, answered
Anything we haven't covered, ask us directly on 07788 373160.
How much does a new boiler cost in Edinburgh?
It varies with the appliance, the system it is going onto, the flue route and whether the gas supply needs upgrading, which is why we survey first and then agree the price with you before any work starts. What we will not do is quote a figure over the phone that has to be revised once someone actually sees the property.
Which boiler brands do you install?
Worcester Bosch and Vaillant. We are an accredited installer for both, which is what allows us to issue the 10-year guarantee as standard on the boiler.
How long does a boiler installation take?
A straight swap in the same position is typically a day. A conversion: moving the boiler, changing from a regular system to a combi, or removing tanks and a cylinder; usually runs to two or three days. You get the expected timeline at quotation stage, not on the morning we arrive.
Will I be without heating and hot water?
Only during the working day of the changeover. We plan the sequence so heating and hot water are back on before we leave, and on multi-day jobs we tell you upfront which night, if any, is affected.
Do I need a power flush before a new boiler?
Not always, a chemical cleanse and a magnetic filter are sufficient on a reasonably clean system. If the existing system is loaded with magnetite, a power flush protects both the new heat exchanger and your guarantee, and we will say so at survey rather than after installation.
Is the boiler guarantee really 10 years?
Yes, a 10-year manufacturer guarantee comes as standard on the boiler, subject to the manufacturer's conditions including annual servicing. We register it for you as part of handover.
How long should a new boiler last?
With annual servicing, clean inhibited system water and a filter on the return, 12–15 years is a realistic working life. Skipping servicing is the fastest way to shorten that and to invalidate the guarantee.
Do you notify Building Standards and Gas Safe?
Yes. Every installation is carried out by a Gas Safe registered engineer and notified accordingly, and you receive the documentation. It matters at the point of selling or letting the property.
Can you convert my system to a combi?
Often, but not always sensibly. It depends on your incoming mains flow rate, the number of bathrooms and how the household uses hot water. We measure and tell you honestly if a system boiler and cylinder would serve you better.
Do you offer boiler servicing afterwards?
Yes, and it is worth booking, annual servicing is a condition of most manufacturer guarantees, so it protects the ten years you have just paid for.
Get a boiler specifiedfor your home, not a script
Survey first, agreed price second, 10-year guarantee on the boiler and 12 months on our workmanship. Worcester Bosch Accredited Installer and Vaillant installer, Gas Safe registered.
Gas Safe registered · £2m public liability · 12-month workmanship guarantee
Related services
Boiler Servicing
An annual service that protects your warranty and catches faults before they become breakdowns.
Boiler Repair
No heating or hot water? Reactive call-outs from a Gas Safe registered engineer.
Power Flushing
Sludge and debris cleared from radiators and pipework so your system heats faster and runs cheaper.
See all services, browse the areas we cover, head back to the homepage, or get in touch.
Next step
Request your estimatefrom Pentaburgh
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07788 373160