14 Rivera Drive, Southend-on-Sea SS1 2RBinfo@avanzaheatingandcooling.co.uk Open 24/7Company No. 17201187 About Heating & Cooling Bathrooms Areas Contact 01702 967120Request Quote - Home - Services - Boiler Installation & Servicing Boiler Installation & Servicing · Essex # Boiler Installation,Servicing & RepairGas Safe. Essex Wide. New boiler installs, like-for-like swaps, annual services, breakdown repairs and power-flushes. Gas Safe registered, same-day response on no-heat and no-hot-water calls, written fixed-price quotes for new installs within 24 hours. Request Free Quote 01702 967120 15+ years on the tools · Gas Safe registered · Open 24/7 · Same-Day Service Open 24/7 · Same-Day Service Gas Safe Registered Free Quote · Price Fixed 14 Days Fully Insured 1-Year Workmanship Guarantee Service Overview ## Boiler Installation & Servicing — What, Who, When & Why. Owner-led by Pierre Codarin from Southend-on-Sea. Single point of contact from first call to final invoice. What it is Avanza's boiler service covers everything Gas Safe: new combi, system and conventional boiler installations, replacement of failed boilers, full annual services, breakdown diagnosis and repair, power-flushing, magnetic filter installs, and smart thermostat retrofits. Who it's for Homeowners with a boiler over 12 years old, landlords needing annual CP12 certificates, and anyone with no heat or no hot water right now. We also work with letting agents managing rental portfolios across Essex. When you need it If your boiler is 10+ years old, costing more in repairs than a service, leaking, banging, losing pressure, or showing recurring fault codes, replacement is usually cheaper across 24 months than continued repair. If it's failed today, we're typically on site same-day. Why hire a professional Gas work is the only trade in the house where doing it wrong can kill someone. Carbon monoxide poisoning, gas leaks and bad flue installations are non-negotiable: only a Gas Safe-registered engineer can legally and safely commission a boiler. Avanza is Gas Safe registered and accredited by Worcester Bosch, Vaillant and Ideal. The Real Cost Of Getting This Wrong ## What Happens If You Ignore It, Delay It, Or Hire The Wrong Person. An ageing boiler doesn't just inconvenience you — it costs you money, voids your insurance, and in the worst cases puts your family at risk from carbon monoxide. ### If It's Ignored — The Damage Cascade - A boiler losing 5% efficiency each year over a 12-year life adds a meaningful chunk to an average annual gas bill — money you'll never see again. - An uncertified flue installation can leak CO into the home; CO has no smell and kills 60+ people a year in the UK. - A boiler without a magnetic filter circulates rust and sludge through the heat exchanger, halving its lifespan. - Insurance claims for water damage from a leaking boiler are routinely refused when there's no current service record. ### Common Mistakes We're Asked To Fix - Letting a 'handyman' or unregistered fitter install or service a gas appliance — illegal, and immediately voids your home insurance. - Skipping annual services and losing the manufacturer warranty in year two. - Replacing a failed boiler like-for-like without checking whether the radiators, pipework or flue need upgrading. - Choosing a boiler on price alone — a cheap unit with a 2-year warranty often costs more across 10 years than a quality unit with a 10-year warranty. Our Process ## A System That Gets Built To Specification — Not To A Mood. - 01 ### Heat-Demand Survey We measure radiator output, hot-water demand, mains pressure and gas pipe size to size the boiler correctly. No guesswork. - 02 ### Fixed Written Quote Within 24 hours you get an itemised quote with three options — usually Worcester, Vaillant and Ideal — across budget, mid and premium. - 03 ### Install Day Old boiler decommissioned, new boiler mounted, flue installed, gas pipe upgraded if needed, system flushed and refilled with inhibitor. - 04 ### Commission & Certify Gas tightness test, flue analysis, full commissioning to manufacturer spec, Gas Safe certificate issued, warranty registered. - 05 ### Annual Service Schedule We diary your annual service so the warranty stays valid. One call from us each year — no chasing. Benefits ## Concrete, Specific, Measurable. No Vague Promises. ### Gas Safe Registered Every install, service and repair signed off Gas Safe. Certificate emailed within 24 hours. ### Same-Day No-Heat Response No heat or no hot water? We're typically on site the same day, often within 4 hours. ### Manufacturer Accredited Accredited installer for Worcester Bosch, Vaillant and Ideal — extended warranties (10–12 years) included on new installs. ### Free Fixed Written Quote No 'from £x' pricing. A free, itemised, lock-in number written down — price fixed for 14 days. ### Magnetic Filter Included Every new install includes a MagnaClean or equivalent filter — protects the heat exchanger and extends boiler life. ### Smart Thermostat Ready Nest, Hive, Tado, Honeywell — wired and commissioned at install if you want it. Inside The Detail ## The Materials, Methods & Variations That Decide The Outcome. These are the details cheaper installers skip — and the reason their work fails inside two years. Working across Southend-on-Sea · Chelmsford · Basildon · Colchester · Brentwood · Rayleigh · Wickford · Billericay · Harlow Full Service Area List ### Combi vs System vs Conventional Combis suit 1–2 bathroom properties with reasonable mains pressure (1.5+ bar) — no cylinder, instant hot water, smallest footprint. System boilers (with an unvented cylinder) suit 2–4 bathroom homes where multiple showers run simultaneously. Conventional (regular) boilers with a header tank suit older properties with weak mains pressure or hard-to-replace pipework. We size based on heat loss and hot-water demand — not on what's there now. ### Brands We Install — Worcester, Vaillant, Ideal Worcester Bosch (Greenstar 4000/8000) — UK market leader, 10-year warranty on the 8000 range, excellent parts availability. Vaillant (ecoTEC plus, ecoFIT pure) — German engineering, very quiet, 10-year warranty, best long-life value. Ideal (Logic Max, Vogue Max) — competitive price point, 10-year warranty on flagship models, strong UK support. We don't push one brand — we recommend based on your property's demand profile. ### Power-Flushing & System Cleaning If your radiators have cold spots, the system is over 8 years old, or you're installing a new boiler onto old pipework, a power-flush is essential. We use a high-flow pump to drive cleaner through every radiator, removing rust, sludge and limescale that would otherwise migrate into your new heat exchanger. A magnetic filter is fitted at the same time to catch future debris. ### Landlord CP12 Certificates Landlords are legally required to provide a Gas Safety Record (CP12) every 12 months for every gas appliance in a rented property. We diary, attend, inspect, and email the certificate on the day — typically within 60 minutes on a single-boiler property. Block bookings for portfolio landlords get priority scheduling and a tiered price. Questions ## StraightAnswers. Cost, timeline, guarantees, lifespan, emergency cover — answered without the sales speak. Ask Yours ### How much does a new boiler install cost in Essex? +Every boiler quote is built from a free on-site survey — we don't list 'from' prices because honest pricing depends on the brand, model, pipework and flue route. You'll receive a fixed written quote, with the price locked in for 14 days. ### How long does a boiler install take? +A straight swap is typically one working day. A combi-to-system conversion, flue relocation or full pipework upgrade is 2–3 days. We'll tell you which on the quote. ### Will my new boiler come with a warranty? +Yes — 10 or 12 years on flagship Worcester, Vaillant and Ideal models when installed by an accredited engineer. We register the warranty on commissioning day; you don't need to do anything. ### Can you fit my boiler same-day if mine has failed? +Often, yes — if the brand and model are in stock at our suppliers and the existing flue location works for the replacement. Worst case it's 24–48 hours, with temporary heating arranged in the meantime. ### Do I need an annual service? +Yes — every manufacturer warranty requires an annual service by a Gas Safe-registered engineer. Miss one and the warranty is void. We diary it for you each year. ### What's a power-flush and do I need one? +A power-flush forces a chemical cleaner through every radiator and pipe to remove sludge. You need one if your radiators have cold spots, the system is 8+ years old, or you're putting a new boiler on old pipework — otherwise the sludge migrates into the new heat exchanger and kills it. ### Do you issue Landlord Gas Safety Certificates (CP12)? +Yes — booked, inspected and emailed the same day. Portfolio landlords get tiered pricing for multiple properties. ### Do you cover my postcode in Essex? +Yes — we work across Southend-on-Sea, Chelmsford, Basildon, Colchester, Brentwood, Rayleigh, Wickford, Billericay and Harlow. If you're outside that ring, call 07809 414913 and we'll confirm coverage before you spend a minute filling in a form. ### Are you Gas Safe registered and fully insured? +Yes. Gas Safe registered for all gas work, fully insured, and trading as Avanza Heating & Bathrooms Ltd (Companies House 17201187). Gas Safe is our only listed accreditation. Certificates and policy numbers available on request before any work starts. Related Services ## Often Booked Alongside Boiler Installation & Servicing. ### Heating & Plumbing Full heating systems, radiator upgrades and general plumbing — our core trade across Essex. View Service ### Landlord Gas Safety Certificates CP12 certificates booked, inspected and issued, fast. View Service ### Underfloor Heating Wet and electric underfloor systems, designed and installed. View Service Back to HomepageAll ServicesAll Service AreasContact Next Step ## Boiler Quote In 24 Hours. Same-Day Help If You've Got No Heat. Gas Safe registered. Worcester, Vaillant and Ideal accredited. Fixed written quote, 10-year warranty on flagship installs. Request Free Quote 01702 967120 Gas Safe registered · Fully insured · 1-year workmanship guarantee · Companies House 17201187 · Southend-on-Sea Premium bathrooms, heating and plumbing across Essex. Owner-led, Gas Safe registered, same-day service guaranteed. 01702 967120info@avanzaheatingandcooling.co.uk14 Rivera Drive, Southend-on-Sea, SS1 2RB Explore - About - Heating & Cooling - Bathrooms - Areas - Contact Services - Heating & Plumbing - Boiler Installation & Servicing - Emergency Plumbing - Underfloor Heating - Landlord Gas Safety Certificates - Luxury Bathrooms Service Areas - Southend-on-Sea - Chelmsford - Basildon - Colchester - Brentwood - Rayleigh - Wickford - Billericay - Harlow © 2026 Avanza Heating & Bathrooms Ltd. Company No. 17201187. All rights reserved. Privacy PolicyTerms & ConditionsOpen 24/7 · Emergency call-outs · Call by 12pm, engineer with you by 4pm Call NowRequest Quote