--- title: "New Boiler Installation Coventry | Combi & System Boiler Fitting — Coventry Plumbing Services" description: "New boiler installation in Coventry and the West Midlands. Combi, system and conventional boilers supplied and fitted by a Gas Safe registered engineer. 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Combi, system and conventional boilers supplied and fitted by a Gas Safe registered engineer. Written quote before any work starts." }, { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "How much does a new boiler installation cost in Coventry?", "acceptedAnswer": { "@type": "Answer", "text": "It depends on boiler type, output, flue route, whether the gas supply needs upgrading and whether the system needs a power flush. We give a written estimate after a survey so the figure reflects your property rather than an average." } }, { "@type": "Question", "name": "How long does a boiler installation take?", "acceptedAnswer": { "@type": "Answer", "text": "A straight combi-for-combi swap in the same position is usually a single day. Moving the boiler, converting from a conventional system to a combi, or adding an unvented cylinder is typically two to three days." } }, { "@type": "Question", "name": "Do I need a power flush before a new boiler?", "acceptedAnswer": { "@type": "Answer", "text": "The system must be clean before a new boiler goes on it. On a relatively healthy system a chemical cleanse and filter may be enough; on an older sludged system we'd recommend a full power flush to protect the new heat exchanger and the warranty." } }, { "@type": "Question", "name": "What size boiler do I need?", "acceptedAnswer": { "@type": "Answer", "text": "It comes from a heat-loss calculation plus your hot-water demand, not from the size of the old boiler. Many homes are running a much larger unit than they need." } }, { "@type": "Question", "name": "Should I switch from a conventional boiler to a combi?", "acceptedAnswer": { "@type": "Answer", "text": "Often yes for a one-bathroom home — it frees up the airing cupboard and loft and removes the tanks. With two or more bathrooms, or a weak incoming main, a system boiler with an unvented cylinder usually performs better." } }, { "@type": "Question", "name": "Is the installation notified and certificated?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. Work is carried out by a Gas Safe registered engineer, notified as required, with Benchmark documentation completed and handed to you." } }, { "@type": "Question", "name": "How long is the warranty on a new boiler?", "acceptedAnswer": { "@type": "Answer", "text": "Manufacturer warranties vary by brand and model — we'll set out the warranty length against each option in the estimate. Our own workmanship guarantee is one year." } }, { "@type": "Question", "name": "Can you install a boiler in a different room?", "acceptedAnswer": { "@type": "Answer", "text": "Usually yes — kitchens, utility rooms, garages and loft spaces are all common. Relocation affects gas, flue, condensate and pipework routes, so it's priced after the survey." } }, { "@type": "Question", "name": "Do you remove the old boiler and tanks?", "acceptedAnswer": { "@type": "Answer", "text": "Yes — the old appliance, packaging and any redundant tanks removed as part of the job are taken away and disposed of." } }, { "@type": "Question", "name": "What happens after installation?", "acceptedAnswer": { "@type": "Answer", "text": "You get commissioning results, Benchmark paperwork and a controls walk-through. An annual service keeps the manufacturer warranty valid." } } ] }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://coventryplumbingservices.com/" }, { "@type": "ListItem", "position": 2, "name": "Services", "item": "https://coventryplumbingservices.com/services" }, { "@type": "ListItem", "position": 3, "name": "Boiler Installation" } ] } ] --- [07576 597464 ](tel:+447576597464) [admin@coventryplumbingservices.com](mailto:admin@coventryplumbingservices.com) 27 Ambler Grove, Coventry CV2 5LZ Open 24 hours · 7 days a week Gas Safe Registered [![Coventry Plumbing Services](/__l5e/assets-v1/29a5f36b-b908-4685-98b5-0f9f3247617e/coventry-plumbing-logo.png)](/) [Home](/)[About](/about) [Services](/services) [Service Areas](/service-areas) [Our Work](/our-work)[Reviews](/reviews)[Contact](/contact) [07576 597464](tel:+447576597464)[Request a Quote](/contact) 1. [Home](/) 2. [Services](/services) 3. Boiler Installation Local to Coventry CV2 # New boiler installation in Coventry Combi, system and conventional boilers supplied and fitted. Properly sized, properly commissioned. An oversized boiler on an undersized system wastes money every single day it runs. We size the boiler to your property, install it to manufacturer spec, and commission it so it actually performs the way the brochure promised. [Request a Quote](/contact) [Call 07576 597464](tel:+447576597464) Gas Safe registered · 5+ years of plumbing experience · Written estimate before any work starts · 1-year workmanship guarantee ![Newly installed white wall-mounted combi gas boiler in a Coventry home](/assets/boiler-servicing-hero-CnDGbIDJ.jpg) Yes Local to Coventry CV2 Before any work Written quotes 7 days/week Open 24/7 Always Customer service first Overview ## New boiler installation — what it is, who it's for, when it's needed. ### What a boiler installation covers A full installation is far more than swapping a box on the wall. It covers heat-loss based sizing, gas supply pipework checks and upgrades where the existing run can't deliver the required kW, a system cleanse or power flush of the existing pipework, magnetic filter and inhibitor, condensate routing to a suitable termination, flue routing and clearance checks, controls and thermostat, then a full commissioning and handover with Benchmark documentation completed and the installation notified to Gas Safe and building control. ### Who it's for Homeowners replacing a boiler that's beyond economical repair, households moving from an old conventional system with tanks in the loft to a modern combi, landlords upgrading rental properties in CV1–CV8 to lower running costs and reduce call-outs, and anyone extending or re-planning a property where the existing heat output no longer matches the number of radiators and bathrooms. ### When it's time to replace rather than repair Rough guide: if the boiler is over 12 years old, parts are obsolete or on long lead times, the repair quote is more than a third of a replacement, or it has failed more than twice in a heating season, replacement usually wins on cost over a three-year horizon. An old non-condensing unit running at 70% efficiency against a modern condensing boiler at 92%+ is also spending your money every hour it fires. ### Why sizing and commissioning matter more than brand Most disappointing installations are not caused by the boiler — they're caused by a unit that's too big for the heat loss, short-cycling all winter, or one that was never commissioned properly: flow temperature left at factory default, no weather compensation, gas rate never checked, system never balanced. We take the heat loss, choose the output, and prove the numbers at handover. What happens if it's ignored ## The cost of waiting. A cheap install looks identical to a good one on the day it's finished. The difference shows up in your bills, your radiators and your warranty claim two winters later. ### Common mistakes we see - Choosing kW output by 'what was there before' instead of a heat-loss calculation. - Reusing an undersized gas supply run so the boiler can never reach rated input. - Skipping the system cleanse and magnetic filter to keep the quote low. - Terminating condensate externally in small-bore pipe — first hard frost, the boiler locks out. - Leaving flow temperature at 80°C so a condensing boiler almost never condenses. ### Voided manufacturer warranty Most warranties require an annual service and evidence the system was cleansed and protected on install. No filter, no inhibitor, no Benchmark record — and the claim gets declined. ### Short cycling and high bills An oversized boiler reaches temperature, shuts down, and re-fires again minutes later. That cycle wears components fast and burns more gas than a correctly sized unit. ### Sludge wrecking a brand-new heat exchanger Fitting a new boiler onto an uncleansed system pushes years of magnetite straight into the new heat exchanger and pump. It's the single most common reason a new boiler fails inside two years. ### Unnotified work Gas work must be notified. An uncertificated installation causes problems at sale, at remortgage, and with home insurance after any incident. Our process ## A clear, documented system — every visit, every job. 1. 01 ### 1\. Survey and heat-loss We measure the property, count the radiators and bathrooms, check hot-water demand and existing gas supply, then size the boiler to the actual heat loss — not a guess. 2. 02 ### 2\. Written estimate and options Clear estimate with two or three suitable options, warranty length on each, and exactly what's included: filter, inhibitor, controls, flue, making good. 3. 03 ### 3\. Preparation and cleanse System cleansed or power flushed where needed, gas supply upgraded where required, condensate route planned, and the work area sheeted before anything comes off the wall. 4. 04 ### 4\. Installation Boiler mounted and connected to manufacturer spec, flue clearances checked, controls wired, filter fitted, system refilled with inhibitor and pressure tested. 5. 05 ### 5\. Commission and handover Gas rate and combustion analysis checked, flow temperature set for condensing efficiency, radiators balanced, Benchmark completed, controls demonstrated, paperwork left with you. Benefits ## What you actually get. ### Lower running costs A correctly sized, correctly commissioned condensing boiler running at the right flow temperature routinely cuts gas use compared with an old unit. ### Full warranty protected Filter, inhibitor, cleanse and Benchmark record all done, so the manufacturer warranty stands up when you need it. ### Right output, first time Heat-loss based sizing rather than 'same as the old one' guesswork means no short cycling and no cold end-of-run radiators. ### Clean, notified work Gas Safe registered, notified and certificated, with all documents left in your hands on the day. ### Tidy on the day Sheeted work area, old boiler and packaging taken away, everything left clean. ### 1-year workmanship guarantee Our installation work is guaranteed in writing on top of the manufacturer's warranty on the appliance. In depth ## Materials, methods and variations. Every Coventry property throws up its own variables — flue routes on terraces, loft tanks in 1930s semis, pressure on high-rise flats. Here's how the main decisions get made. [Discuss your project](/contact) ### Combi vs system vs conventional A combi suits most one-bathroom homes: no cylinder, no tanks, hot water on demand, but output falls with mains flow rate so it's a poor fit where the incoming main is weak. A system boiler with an unvented cylinder suits two or more bathrooms and simultaneous demand, giving mains-pressure hot water everywhere. A conventional (heat-only) boiler stays where the property has gravity-fed pipework, loft tanks and a good reason not to disturb them. ### Sizing on heat loss, not habit We work from room dimensions, glazing, insulation and target temperatures to establish heat loss in kW, then add hot-water demand. Most three-bed Coventry semis need far less heating output than the boiler they currently have — right-sizing is usually a downgrade in kW and an upgrade in performance. ### Flue, condensate and gas supply Flue terminations must respect clearances from openings, boundaries and adjacent buildings — tight terraces often need a longer horizontal run or a vertical route. Condensate should ideally terminate internally to a soil stack; where it must go externally we use larger bore and insulation to avoid freeze lock-outs. Gas supply runs are checked for pressure drop under load and upgraded from 15mm to 22mm where the calculation demands it. ### Controls and efficiency A modern boiler paired with a basic on/off thermostat throws away much of its potential. Load or weather compensation, or a good modulating smart control, lets the boiler run lower and longer, staying in condensing mode. We set flow temperature for condensing efficiency and balance the radiators to suit rather than leaving factory settings. ### Unvented cylinders and G3 Where a system boiler and unvented cylinder are specified, the cylinder work is carried out under G3 qualification, with correct discharge pipework, expansion provision and annual serviceability in mind. Areas covered Coventry, CV2 & the wider West Midlands. - [Coventry](/service-areas) - [Warwickshire](/service-areas) - [West Midlands](/service-areas) - [Birmingham](/service-areas) - [Leicester](/service-areas) - [Solihull](/service-areas) - [Nuneaton](/service-areas) - [Rugby](/service-areas) - [Leamington Spa](/service-areas) FAQ ## Boiler Installation — straight answers. Still unsure? Call [07576 597464](tel:+447576597464) — no obligation. - How much does a new boiler installation cost in Coventry? It depends on boiler type, output, flue route, whether the gas supply needs upgrading and whether the system needs a power flush. We give a written estimate after a survey so the figure reflects your property rather than an average. - How long does a boiler installation take? - Do I need a power flush before a new boiler? - What size boiler do I need? - Should I switch from a conventional boiler to a combi? - Is the installation notified and certificated? - How long is the warranty on a new boiler? - Can you install a boiler in a different room? - Do you remove the old boiler and tanks? - What happens after installation? Related services ## You may also need. [ ### Boiler Repair Learn more ](/services/boiler-repair)[ ### Boiler Servicing Learn more ](/services/boiler-servicing)[ ### Power Flushing Learn more ](/services/power-flushing)[ ### Heating Learn more ](/services/heating) Or browse [all services](/services) · [home](/) · [contact us](/contact) Ready to book? ## Need boiler installation in Coventry? Let's sort it. Call us or request a written quote — we'll come back to you fast. 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