Please note that all Gas Boilers must only be installed by rgii.ie registered & approved fitters. Flu Exhaust Kits are available for your Boiler and are purchased separately.
The Ideal Logic 18HE Heat Only Boiler is a compact, high-efficiency solution designed for traditional open-vented or sealed heating systems that use a hot water cylinder. Suitable for small to medium-sized Irish homes, it delivers dependable central heating performance with low running costs and quiet operation.
Part of the trusted Logic Heat IE range, this boiler is Energy Saving Trust endorsed and built to Ideal’s proven reliability standards. Its compact cupboard-fit design and lightweight construction make it ideal for replacement installations where space is limited.
Key Features
Boiler type: Heat Only (Regular)
Output: 18kW
High efficiency condensing boiler
SEAI HARP efficiency rating: 91%
Compact cupboard-fit design
Fully back-lit LCD display
Built-in frost protection
Low installation weight (22.7kg)
Quiet operation
LPG conversion available
Wide range of flueing options
Made in the UK
7-year warranty
Up to 10-year heat exchanger warranty (manufacturer terms apply)
Performance Overview
Central heating output (70°C): 4.8 – 18.0 kW
Seasonal space heating efficiency: 93% (Class A)
NOx Class 6 (low emissions)
Indoor sound level: 41 dB
Suitable for systems with a hot water cylinder
Important Information
Must be installed by an RGII.ie registered and approved installer
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
Swipe sideways to compare delivery options.
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.
