--- title: "Boiler & Heating Advice for Your Home | English Plumber" description: "Practical guides to boiler quotes, servicing, CO certification and heating options. Jordan explains what to check before you book work or choose a new system." url: https://www.englishplumber.nl/guides/ language: en-NL alternate: https://www.englishplumber.nl/nl/advies/ --- 1. [Home](https://www.englishplumber.nl/) 2. Guides # Useful answers before you book Comparing quotes, deciding on maintenance or choosing a new heating setup? These guides cover the questions that help you make a more informed choice. - [Replacing your boiler: what are your options?](https://www.englishplumber.nl/guides/heat-pump-rules/) [Replacing a boiler in 2026? Understand the withdrawn heat-pump rule, check the plans for your home and compare practical options before choosing a system.](https://www.englishplumber.nl/guides/heat-pump-rules/) [Last checked October 2026](https://www.englishplumber.nl/guides/heat-pump-rules/) - [How to check CO certification for boiler work](https://www.englishplumber.nl/guides/co-certificate/) [Booking a gas boiler installation or service? Learn what CO certification covers, where to check the company and which details to ask for before the visit.](https://www.englishplumber.nl/guides/co-certificate/) [Last checked October 2026](https://www.englishplumber.nl/guides/co-certificate/) - [How to compare boiler quotes properly](https://www.englishplumber.nl/guides/reading-a-dutch-quote/) [Comparing boiler quotes? Check the model, flue, installation work, VAT and optional extras. Jordan explains what to look for before you agree to a price.](https://www.englishplumber.nl/guides/reading-a-dutch-quote/) [Last checked September 2026](https://www.englishplumber.nl/guides/reading-a-dutch-quote/) - [A service contract or a one-off visit?](https://www.englishplumber.nl/guides/maintenance-contract-vs-one-off/) [Should you take a boiler maintenance contract or book a one-off service? Compare the service interval, parts cover and breakdown response before deciding.](https://www.englishplumber.nl/guides/maintenance-contract-vs-one-off/) [Last checked October 2026](https://www.englishplumber.nl/guides/maintenance-contract-vs-one-off/) - [Moving bathroom pipes without gutting the room](https://www.englishplumber.nl/guides/moving-bathroom-pipes/) [Moving pipes in a bathroom usually works without breaking the whole room open. Which method suits the job, roughly what it costs, and when to bring in a professional.](https://www.englishplumber.nl/guides/moving-bathroom-pipes/) [Last checked October 2026](https://www.englishplumber.nl/guides/moving-bathroom-pipes/) - [When old pipes really need replacing](https://www.englishplumber.nl/guides/replacing-old-pipes/) [Lead pipes always have to go. With copper, steel or old plastic, the signs decide whether it is urgent or can wait. Here is how to tell where you stand.](https://www.englishplumber.nl/guides/replacing-old-pipes/) [Last checked October 2026](https://www.englishplumber.nl/guides/replacing-old-pipes/) - [Low boiler pressure or a code on the display](https://www.englishplumber.nl/guides/boiler-pressure-and-fault-codes/) [Boiler pressure too low or a fault code on the display? What the gauge should read, how to top up with the vulkraan, and when to reset or call an engineer.](https://www.englishplumber.nl/guides/boiler-pressure-and-fault-codes/) [Last checked October 2026](https://www.englishplumber.nl/guides/boiler-pressure-and-fault-codes/) - [A before-winter routine for your boiler](https://www.englishplumber.nl/guides/boiler-winter-check/) [A before-winter routine for your cv-ketel: when it was last serviced, bleeding, pressure, the thermostat programme, frost-proof pipes and a working CO alarm.](https://www.englishplumber.nl/guides/boiler-winter-check/) [Last checked October 2026](https://www.englishplumber.nl/guides/boiler-winter-check/) - [Why a radiator stays cold, and what to do about it](https://www.englishplumber.nl/guides/radiator-not-heating-up/) [One radiator cold, cold at the top or only warm at the bottom? How to bleed it, check the pressure afterwards, free a stuck valve and when balancing helps.](https://www.englishplumber.nl/guides/radiator-not-heating-up/) [Last checked October 2026](https://www.englishplumber.nl/guides/radiator-not-heating-up/) - [Renting? Who looks after the cv-ketel](https://www.englishplumber.nl/guides/boiler-in-a-rented-home/) [Renting in the Netherlands? Who services, repairs and replaces the cv-ketel, which small jobs are yours, and what to do when the landlord doesn't act.](https://www.englishplumber.nl/guides/boiler-in-a-rented-home/) [Last checked October 2026](https://www.englishplumber.nl/guides/boiler-in-a-rented-home/) - [Which thermostat suits your boiler?](https://www.englishplumber.nl/guides/choosing-a-thermostat/) [Choosing a thermostat? What on/off and modulating (OpenTherm) control mean, clock versus smart, wired or wireless, and what to check on your boiler first.](https://www.englishplumber.nl/guides/choosing-a-thermostat/) [Last checked October 2026](https://www.englishplumber.nl/guides/choosing-a-thermostat/) - [A leak at home, step by step](https://www.englishplumber.nl/guides/water-leak-first-steps/) [Water leak at home? Close the hoofdkraan, keep clear of wet electrics, photograph the damage and tell your insurer. What to do first, and who to call.](https://www.englishplumber.nl/guides/water-leak-first-steps/) [Last checked October 2026](https://www.englishplumber.nl/guides/water-leak-first-steps/) - [The Dutch words on your boiler, quote and invoice](https://www.englishplumber.nl/guides/dutch-heating-terms/) [Cv-ketel, combiketel, HR, CW-klasse, vulkraan, voorrijkosten: the Dutch heating words on your boiler, quote or invoice, explained in plain English.](https://www.englishplumber.nl/guides/dutch-heating-terms/) [Last checked October 2026](https://www.englishplumber.nl/guides/dutch-heating-terms/) - [What your boiler's noises are telling you](https://www.englishplumber.nl/guides/boiler-noises/) [A ticking, gurgling, banging or whistling boiler? Which sounds are harmless, which you can fix yourself and which need an engineer, explained by Jordan.](https://www.englishplumber.nl/guides/boiler-noises/) [Last checked September 2026](https://www.englishplumber.nl/guides/boiler-noises/) - [Air in your underfloor heating, and how to get it out](https://www.englishplumber.nl/guides/bleeding-underfloor-heating/) [Underfloor heating cold in places or gurgling? How to bleed it at the manifold (verdeler), what the pressure does afterwards, and when it needs a flush.](https://www.englishplumber.nl/guides/bleeding-underfloor-heating/) [Last checked October 2026](https://www.englishplumber.nl/guides/bleeding-underfloor-heating/) - [What the expansion vessel does, and how to tell it's failing](https://www.englishplumber.nl/guides/expansion-vessel/) [Pressure up when hot, down when cold, safety valve dripping, endless topping up? How the expansievat works, how it's checked and when it's replaced.](https://www.englishplumber.nl/guides/expansion-vessel/) [Last checked October 2026](https://www.englishplumber.nl/guides/expansion-vessel/) - [Water under the boiler: find the source before you panic](https://www.englishplumber.nl/guides/boiler-leaking/) [Water under your cv-ketel? Switch it off, then find the source: safety valve, condensate pipe, fitting or heat exchanger. What's safe to do and when to call.](https://www.englishplumber.nl/guides/boiler-leaking/) [Last checked October 2026](https://www.englishplumber.nl/guides/boiler-leaking/) - [Moving your boiler to a better spot](https://www.englishplumber.nl/guides/moving-a-boiler/) [Want the boiler out of the kitchen or up in the attic? What moving it involves, from gas and flue to condensate and permits, and what it costs with Jordan.](https://www.englishplumber.nl/guides/moving-a-boiler/) [Last checked September 2026](https://www.englishplumber.nl/guides/moving-a-boiler/) - [What a new boiler really costs](https://www.englishplumber.nl/guides/new-boiler-cost/) [New boiler cost in the Netherlands: what's in the price, Jordan's fixed CW4 and CW5 prices, what pushes it up, repair or replace, and how to compare quotes.](https://www.englishplumber.nl/guides/new-boiler-cost/) [Last checked October 2026](https://www.englishplumber.nl/guides/new-boiler-cost/) - [Radiator valve stuck or broken? Here's what to replace](https://www.englishplumber.nl/guides/replacing-a-radiator-valve/) [Radiator valve stuck or broken? How to free the pin, when a new head is enough, when the whole valve must go, and where presetting and balancing come in.](https://www.englishplumber.nl/guides/replacing-a-radiator-valve/) [Last checked October 2026](https://www.englishplumber.nl/guides/replacing-a-radiator-valve/) - [Servicing an Intergas boiler, and what its fault codes mean](https://www.englishplumber.nl/guides/intergas-boiler/) [Kombi Kompakt HRE or Xtreme? What Intergas says about service intervals, pressure and fault codes 1, 4, 5 and 6, and what a service with Jordan involves.](https://www.englishplumber.nl/guides/intergas-boiler/) [Last checked October 2026](https://www.englishplumber.nl/guides/intergas-boiler/) - [Servicing a Remeha boiler and reading its messages](https://www.englishplumber.nl/guides/remeha-boiler/) [Avanta, Tzerra or Calenta? What Remeha says about servicing, service messages, the dirt filter and its A, H and E codes, and what Jordan does on a service.](https://www.englishplumber.nl/guides/remeha-boiler/) [Last checked October 2026](https://www.englishplumber.nl/guides/remeha-boiler/) - [Servicing a Nefit-Bosch boiler, and reading its codes](https://www.englishplumber.nl/guides/nefit-bosch-boiler/) [TrendLine, ProLine or 9700i? What Nefit-Bosch says about servicing, the H service symbol, codes such as 2E 207 and H07, and what Jordan does on a service.](https://www.englishplumber.nl/guides/nefit-bosch-boiler/) [Last checked October 2026](https://www.englishplumber.nl/guides/nefit-bosch-boiler/) - [Servicing an ATAG boiler and reading its codes](https://www.englishplumber.nl/guides/atag-boiler/) [ATAG boiler servicing and faults in Noord-Holland. What codes 105, 117 and 118 mean, ATAG's service interval, the right pressure and what Jordan does.](https://www.englishplumber.nl/guides/atag-boiler/) [Last checked October 2026](https://www.englishplumber.nl/guides/atag-boiler/) - [Servicing a Vaillant and reading its F-codes](https://www.englishplumber.nl/guides/vaillant-boiler/) [Vaillant boiler servicing and faults in Noord-Holland. F.22, F.28 and F.75 from Vaillant's own code list, the right pressure and what a service involves.](https://www.englishplumber.nl/guides/vaillant-boiler/) [Last checked October 2026](https://www.englishplumber.nl/guides/vaillant-boiler/)