Unvented Cylinder Installation in Woking
Mains-pressure hot water on every tap, no more loft tanks, and the airing cupboard reclaimed — that's what an unvented cylinder gets you in Woking. We're G3 qualified (the specific certification for unvented systems, distinct from Gas Safe) and fit Megaflo, Telford and Joule cylinders weekly across GU21. The switch typically takes 2 days and includes the safety commissioning and Building Regulations notification.
Why this matters in Woking (GU21)
Bigger Woking homes — particularly large detached homes in Horsell — often outgrow a combi's hot water flow when a second bathroom or en-suite goes in. An unvented cylinder is usually the right answer at that point: strong flow to two showers running simultaneously, no drop-off, no tank in the loft.
Unvented cylinder installation in Woking — at a glance
- Cylinder-only replacement
- £1,895-£2,495
- Vented-to-unvented conversion
- £2,495-£3,195
- Full boiler + cylinder + rads
- £6,500-£9,500
- Cylinder warranty (Megaflo)
- 25 years
- Typical timescale
- 2 days on site
G3 qualified across GU21
- G3 unvented hot water certification (verifiable)
- Megaflo, Telford and Joule cylinders fitted weekly
- Building Notice filed with Woking Borough Council automatically
- Full commissioning + user walkthrough on handover
Unvented cylinder installation FAQs for Woking
What size unvented cylinder do I need in Woking?+
Rule of thumb: 45L per person plus 50L for the bath. A 3-bed town-centre flats with 2 bathrooms typically needs 180-210L; a 4-5 bed home with 3 bathrooms needs 250-300L. We size at survey based on your actual usage, not a formula.
Do I need a system boiler with an unvented cylinder in Woking?+
Almost always yes — a system boiler and unvented cylinder are the standard modern pairing. A combi + unvented cylinder is unusual and rarely worth the complexity. If you're on a combi and upgrading to unvented, budget for a boiler swap too.
How much does an unvented cylinder install cost in Woking?+
Cylinder-only replacement (existing unvented): £1,895-£2,495. Vented-to-unvented conversion including loft tank removal: £2,495-£3,195. Full system boiler + unvented + rad upgrades: £6,500-£9,500.
Where does the discharge pipe run for a Woking unvented cylinder?+
To a safe outside location — usually the side of the house or into an internal drain via a tundish. Compliant with G3 and building regulations. We plan the route at survey and confirm with Woking Borough Council where required.
Which brand of unvented cylinder do you fit in Woking?+
Megaflo Eco (Heatrae Sadia) for most installs — proven, well-supported, easy to service. Telford Tempest for stainless-steel-preferred customers, and Joule for solar-thermal-ready installs. All come with 25-year cylinder warranties.
More Woking guides
An unvented cylinder is the right upgrade for most Woking homes running out of hot water. Book a survey and we'll size it correctly, plan the discharge route, and give you a fixed-price written quote inside 48 hours.