Make boiler installations quicker, cleaner and more reliable with the Grant EZ90 Flue System, a low-level balanced flue kit designed specifically for Grant indoor oil and condensing boilers up to approximately 26 kW (90 BTU). This complete flue assembly delivers a room-sealed combustion path with combustion air intake and exhaust pathways in one unit — ensuring safe operation, reduced draught dependencies and efficient flue gas discharge to the outdoors.
The EZ90 kit features a telescopic stainless steel flue design with self-sealing ducts and a quick-fit clamp arrangement that eliminates the need for silicone or tape at joints, helping installers achieve a positive, airtight seal every time. Its compact stainless steel terminal and guard provide neat exterior detailing, while the modular assembly allows adjustment to suit a range of wall thicknesses.
Designed to work seamlessly with Grant boilers in internal plant rooms, boiler houses and utility spaces, the EZ-Fit system reduces installation time and helps maintain compliant, balanced combustion performance even under exposed conditions.
Key Features
Balanced Flue Design: Dual path for combustion air intake and flue gas exhaust — maintains boiler efficiency and safety.
Telescopic Stainless Steel Flue: Adjustable length to suit different wall thicknesses — quick and simple to fit.
Self-Sealing Ducts: No silicone or tape needed; positive seal with quick-fit clamps.
Compact Terminal with Guard: Provides neat exterior finish and protection.
Easy Installation: Designed for fast assembly and reduced labour time.
Compatible with Grant Boilers: Suits most internal Grant models up to ~26 kW (90 BTU).
Technical Specification
Product: Grant EZ90 Flue Kit (EZ-Fit Flue System)
Application: Low-level balanced flue for internal/boiler house installations
Compatible Boiler Output: Up to ~26 kW (90 BTU)
Flue Type: Balanced concentric flue system for oil/condensing boilers
Flue Material: Stainless steel components
Design: Telescopic adjustable unit with self-sealing ducts
Installation: Horizontal discharge through external wall; adjustable length to suit site requirements
Terminal: Stainless steel with guard included
Sealing System: Quick-fit clamp assembly with factory sealed joints
Compliance: Designed for balanced room-sealed flue requirements
We offer reliable delivery services throughout the Republic of Ireland, with straightforward delivery charges for both trade and DIY customers. Delivery options are confirmed at checkout based on your order and delivery Eircode.
Delivery Charges & Delivery Times
Delivery Type
Delivery Area
Delivery Charge
Delivery Time
Small Items
Republic of Ireland
€9.99
3–4 working days
Large & Heavy*
Standard delivery area
€29.99
5–7 working days
Extra Large*
Standard delivery area
€50.00
5–7 working days
Paint 5L or less**
Standard delivery area
€19.99
5–7 working days
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Small Items
Delivery area
Republic of Ireland
Charge
€9.99
Delivery time
3–4 working days
Large & Heavy*
Delivery area
Standard delivery area
Charge
€29.99
Delivery time
5–7 working days
Extra Large*
Delivery area
Standard delivery area
Charge
€50.00
Delivery time
5–7 working days
Paint 5L or less**
Delivery area
Standard delivery area
Charge
€19.99
Delivery time
5–7 working days
*Standard delivery policy. Promotional delivery rates may apply during campaigns.
Additional Information
FREE delivery on eligible Small Items and Large & Heavy orders over €1,499, within the standard delivery area only.
Special Order and Catalogue Products require an additional 5 working days.
FREE collection of old appliances is available through WEEE Ireland when purchasing qualifying large appliances.
FREE Click & Collect is available for items in stock at your selected branch.
Large & Heavy and Extra Large items are available within our standard delivery area only.
Paint delivery Paint in tin cans 5L or less is available for delivery. Larger sizes and paint supplied in plastic buckets are available for Click & Collect only.
TJ O'Mahony offers a 30-day returns policy on eligible unused products, giving you additional time beyond the statutory 14-day cooling-off period applicable to most online consumer purchases.
Eligible products can be returned for a refund or exchange within 30 days of delivery or collection, provided they are unused, in their original and re-saleable condition, complete with all supplied parts and accessories, and accompanied by proof of purchase.
Please note: Return restrictions apply to certain products, including Mixed Paint, certain Bagged Building Products, Solid Fuel, Special Order, Non-Stock and Catalogued Products.
Your statutory rights in relation to faulty, damaged, incorrectly supplied or non-conforming goods are not affected.
