CU Series

Condensing Wall Hung Gas Boiler

Full premixed condensing technology, ensuring complete combustion and up to 107% heat efficiency, meeting Class I energy standards.
Ultra-low NOx & CO emissions, environmentally friendly, reducing air pollution and supporting low-carbon living.
Large color display with touch control, intuitive interface for simple and convenient operation.
Wi-Fi remote control, enabling smart heating management anytime, anywhere.

Note: Product images are for illustration purposes only. Appearance may vary by model and specification. Please refer to the actual product for details.

Overview

The CU series fully premixed condensing gas wall-hung boiler is designed to deliver high efficiency and intelligent heating solutions. With advanced full premixed condensing technology, it achieves up to 107% heat efficiency, significantly reducing gas consumption and operating costs.

Equipped with low NOx emission (Class 5), it meets strict environmental standards while minimizing pollution. Combined with Wi-Fi smart control and a user-friendly interface, it provides a comfortable, energy-saving and intelligent heating experience for modern homes.

Product Features:

Full premixed condensing technology, up to 107% heat efficiency, energy-saving and cost-effective
Low NOx emission (Class 5), environmentally friendly and compliant with European standards
Large color display with touch control, intuitive and easy to operate
Wi-Fi remote control, enabling smart heating anytime, anywhere
IPX5D protection level, moisture-resistant and durable for long-term use

Product Dimensions

Parameter Technology

	Unit	LL1GBQ24-B26CU	LL1GBQ28-B30CU	LL1GBQ35-B37CU
Power
Max heating rated heat load	kW	24.4	28.4	35
Min heating rated heat load	kW	5	5.5	5.8
Heating rated condensing heat output (50°C/30°C)	kW	26	30	37
Max heating rated heat output (80°C/60°C)	kW	24	28	33.6
Min heating rated heat output (80°C/60°C)	kW	5	5.3	5.6
Heating rated condensing heat output (50°C/30°C)	kW	5	5.8	6.2
Domestic hot water rated heat load	kW	24.4	28.4	35
Efficiency
Energy efficiency rate		Class 1	Class 1	Class 1
Rated heat efficiency (80°C/60°C)	%	98	99	99
Rated heat efficiency (50°C/30°C)	%	107	107	107
Heat efficiency at 30% power	%	107	107	107
Technical data
Gas consumption of heating capacity (NG)	m3/h	2.6	3	3.7
Anti-freeze system start temperature	°C	5	5	5
Min hot water output capacity	kg/min	2.5	2.5	2.5
Max water pressure of heating system	MPa	0.3	0.3	0.3
Water pressure of domestic hot water	MPa	0.02-0.8	0.02-0.8	0.02-0.8
Expansion tank capacity	L	6.5	8	8
Preset pressure of expansion tank	MPa	0.1	0.1	0.1
Rated gas pressure (NG)	kPa	2	2	2
Gas pressure range (NG)	kPa	1.5-3.0	1.5-3.0	1.5-3.0
Performance
Heating temperature setting range	°C	30-80	30-80	30-80
Domestic hot water temperature setting range	°C	30-60	30-60	30-60
Hot water production capacity (△t=25K)	kg/min	13.4	15.6	19.2
Hot water production capacity (△t=30K)	kg/min	11.2	13.2	16
Circuit part
Rated power capacity	W	110/130	120/130	130/150
Electrical power supply voltage	–	220V~50Hz	220V~50Hz	220V~50Hz
Electric shock protection type	–	Class I	Class I	Class I
Degree Of Protection Against Humidity	–	IPX5D	IPX5D	IPX5D
NOx emission grade	–	Class 5	Class 5	Class 5
External dimensions	mm	(L)420X(W)345X(H)720	(L)420X(W)345X(H)720	(L)420X(W)400X(H)720