Home Heating
Home Heating | Tankless Water Heater Install | Plumbing | Lancing
Experience endless hot water and lower energy bills with HEP’s expert tankless water heater install service in Lancing. Our certified plumbers remove bulky, inefficient tanks and replace them with sleek, on-demand systems that heat water only when you need it—saving space, cutting utility costs, and delivering a steady stream of comfort for every shower, dish cycle, and load of laundry. Because we’re local, we understand Lancing’s water quality and regulations, so your installation meets code and performs flawlessly from day one.
From the first call to the final cleanup, HEP handles everything: precise sizing, fast same-day installation, haul-away of your old unit, and a thorough walkthrough so you know exactly how to maximize efficiency. Plus, every job is backed by generous warranties and 24/7 emergency support, giving you total peace of mind. Ready to upgrade? Schedule your tankless water heater install today and feel the HEP difference every time you turn on the tap.
FAQs
What are the main advantages of installing a tankless water heater in my Lancing home?
A modern tankless (on-demand) water heater heats water only when a tap or appliance calls for it, so you are not paying to keep 100–150 L in a cylinder hot 24/7. The benefits include: • Endless hot water – ideal for families or back-to-back showers. • Up to 35 % lower gas consumption compared with a storage cylinder, reducing your energy bills and carbon footprint. • Compact wall-hung unit frees up airing-cupboard or loft space. • Typically 20-year service life, about double that of a conventional cylinder. • Lower risk of leaks and no risk of tank rupture or stored-water bacterial growth. In Lancing’s relatively mild climate, a condensing gas model can achieve efficiencies of 94 % or higher, maximising savings.
How do I know what size (flow rate) tankless unit I need?
Sizing is based on the maximum number of fixtures you expect to run simultaneously and the temperature rise required. We calculate: 1. Peak flow: Add the flow rates of the fixtures you might use at once (e.g. 9 L/min shower + 6 L/min kitchen tap = 15 L/min). 2. Temperature rise: Subtract incoming mains temperature (≈10 °C in West Sussex winter) from desired hot-water temperature (typically 50 °C). That’s a 40 °C rise. A unit that can deliver 15 L/min at 40 °C rise will suit that scenario. During your survey our Gas Safe engineer measures your actual flow rates and recommends a model—usually 26–32 kW for a one-bath property and 37–45 kW for larger homes with two bathrooms.
Will my existing gas pipework and flue be adequate for a tankless heater?
Often, but not always. Tankless appliances draw more gas at once than a small regular boiler, so we may need to upgrade the supply line to 22–28 mm copper within a few metres of the unit. We pressure-test the existing run during the quote. Ventilation also changes: condensing models use a 100 mm plastic concentric flue that can terminate horizontally through an outside wall, usually the easiest option. If your old boiler flue is 125 mm metal, we’ll replace it with the manufacturer’s approved kit. All work is completed to Gas Safety (Installation & Use) Regulations 1998 and Building Regulations Part J.
How long does installation take and will I be without hot water?
A straightforward replacement in the same location normally takes one working day: • Morning: drain and remove old cylinder/boiler, prepare wall and services. • Mid-day: fit gas upgrade (if required), mount new tankless unit, run flue. • Afternoon: connect water, gas, electrics, fill, commission, and register the appliance. You will be without hot water for roughly 4–6 hours. If we are relocating the unit, adding a water-softener, or converting from electric immersion, allow 1½–2 days.
What maintenance does a tankless water heater need in the Lancing area?
West Sussex mains is classed as moderately hard, so annual or biennial descaling is recommended. We install isolation and service valves so the heat exchanger can be flushed with food-grade vinegar or phosphoric solution in 45 minutes. During the service we also: • Inspect burner and fan, clean if necessary. • Check condensate trap and neutraliser. • Test gas pressure and emissions. • Update the digital service log for warranty compliance. Regular maintenance prevents lime-scale build-up, keeps efficiency high, and protects the 10–15 year heat-exchanger warranty.
What does a tankless installation cost and how much could I save on energy bills?
Supply and fit pricing in Lancing typically ranges £1,650–£2,600 inc. VAT, depending on model output, flue length, and any gas-line upgrade. Replacing a hot-water cylinder and re-using the existing boiler as a space-heating only unit can reduce costs at the lower end. Savings: If your current setup is a 20-year-old non-condensing boiler and cylinder, switching to a 94 % efficient condensing tankless unit can cut water-heating gas use by 25–40 %. For an average family spending £400 / yr on hot water, that’s £100–£160 saved annually, giving a 10–15 year lifetime saving of over £1,200, plus the benefit of reclaimed airing-cupboard space.