Central Heating Installation in Hertfordshire

A full central heating installation for a typical 3-bedroom semi-detached house ranges from £4,000–£8,000. A 4–5 bedroom detached property with a larger boiler and more radiators can reach £8,000–£12,000. The main variables are boiler capacity, number of radiators, complexity of pipework routing and the type of controls specified. A fixed written quote is agreed before any work begins.

A full new installation in a typical 3-bedroom property takes 4–6 working days. A 4–5 bedroom property or one requiring significant pipe runs through floors and ceilings may take 6–8 days. Conversions from storage heaters or back-boilers add 1–2 extra days. We provide a firm project timeline alongside your written quote.

Yes — this is one of the most common projects we carry out in Hertfordshire. We install a new gas boiler, lay all pipework, fit radiators in every room and commission full heating controls. The process typically takes 5–7 days. You will need a gas supply to the property (or we can arrange a new connection). The result is usually a significantly warmer home with more controllable and efficient heating.

Yes. Back-boiler removal and replacement with a modern combi or system boiler is a project we carry out regularly across Hertfordshire. The old back-boiler and fire surround are removed and the chimney flue is decommissioned. The new boiler is typically installed in the kitchen or utility room. The existing pipework may be reused or replaced depending on condition.

Boiler sizing depends on the number of bedrooms and bathrooms, the size of each room, insulation levels and your hot water demand. As a rough guide: 1–2 bedroom flat — 24–28kW; 3 bedroom semi — 28–32kW; 4–5 bedroom detached — 32–40kW. We carry out a proper heat load calculation for every installation to ensure the boiler is correctly sized — an oversized boiler wastes money and an undersized one cannot meet demand.

Yes. We install Nest, Hive, Vaillant vSMART and Worcester Wave smart thermostats as standard options. Smart controls allow you to control heating from your phone, set schedules by room and receive alerts if something goes wrong. Studies show smart controls reduce heating bills by 10–20% compared to a traditional programmer.

It depends on your hot water demand. A combi boiler heats water on demand without a separate hot water cylinder — ideal for 1–3 bedroom properties with one bathroom. A system boiler works with a hot water cylinder and is better suited to larger homes with multiple bathrooms where several people may use hot water simultaneously. We will recommend the right type based on your household size and usage.

In most new installations, yes — pipework needs to run under floors between rooms and floors. We always protect your home during this work with dust sheets and floor protection. We make good after lifting floorboards and aim to leave each room as close to its original state as possible. Any significant making-good work (e.g. plastering) is agreed upfront in your quote.

Yes. Wet (hydronic) underfloor heating can be installed as part of a new central heating system, either for the whole ground floor or for specific rooms such as kitchen or bathroom. We design systems that integrate underfloor heating zones with conventional radiators elsewhere in the property, controlled by a multi-zone smart thermostat.

Yes. Every new central heating installation is a notifiable work under the Gas Safety (Installation and Use) Regulations 1998. We are Gas Safe registered (No. 936121) and issue the appropriate Gas Safety Certificate on completion. The work is also registered with your local authority through the building control notification process.

In Hertfordshire's very hard water (300–400ppm), a new heating system must be protected from day one. We fit a magnetic system filter as standard on every installation and dose the system with corrosion inhibitor (Fernox or Sentinel). For maximum long-term protection, we recommend also installing a water softener, which prevents scale forming anywhere in the system or boiler. Without protection, limescale will shorten the life of the new heat exchanger significantly.

Yes. If your existing system is in good condition but needs more radiators (for an extension, loft conversion or new room), we can extend the pipework and add radiators. If the boiler is ageing but the pipework and radiators are sound, a boiler-only replacement may be the best value option. We assess your current system and recommend the most cost-effective approach.