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TONGYI Domestic Hot Water Tank | Efficient Water Heating Solutions for Homes & Commercial Use

The domestic water tank works in coordination with the heat pump. After the heat pump heats water, it is stored in a water tank. When there is a demand for hot water, such as for daily washing and kitchen use, it can be supplied stably and promptly. Even when the heat pump is not in operation, the hot water in the water tank can still meet the usage for a period of time, ensuring an uninterrupted supply of hot water for the household and enhancing the convenience and comfort of life.

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Technical Specifications

Model		D200L	D300L	D500L	D1000L
Energy Label		A	A	A	A
Nominal capacity	L	200	300	500	1000
Outer tank diameter	mm	Φ560	Φ600	700	900
Inner tank diameter	mm	470	500	600	800
Height	mm	1325	1560	1828	2320
Inner tank material		Duplex	Duplex	Duplex	Duplex
Inner tank thickness	mm	1	1	1.5	2
Outer case material		Glavalized steel with painting			SUS304
Electrical heater	(kW/230V)	3	3	3	3
Coil material	wave shape	SUS316L	SUS316L	SUS316L	SUS316L
Heat exchanger area	m2	3	4	5	5
Connections	temp.sensor hole	G1/2"	G1/2"	G1/2"	G1/2"
	how water outket	G3/4"	G3/4"	G1"	G1"
	heat exchanger coil inlet/outlet	G3/4"	G3/4"	G3/4"	G3/4"
	cold water inlet	G3/4"	G3/4"	G1"	G1"
	T/P connection	G1/2"	G1/2"	G1/2"	G1/2"
Working pressure	bar	6	6	6	6
MAX.testing pressure	bar	10	10	10	10
Insulation		Foaming	Foaming	Foaming	Foaming
Insulation thickness	mm	45	50	50	50
Packing size	mm	630/630/1440	670/670/1630	780/780/1930	950/950/2450

Product Description

Heat Pump Integrated Operation – Automatically stores hot water generated by the heat pump, ensuring stable supply even when the heat pump is idle.

Rapid Response to Demand – Delivers instant hot water for daily washing, kitchen use, and bathing without waiting for the heat pump to restart.

Extended Thermal Retention – Maintains water temperature for extended periods, reducing heat pump cycling and saving energy.

Dual-Temperature Control Ready – Compatible with systems requiring separate temperature settings for different usage scenarios.

product advantages

TONGYI Domestic Hot Water Tank | Efficient Water Heating Solutions for Homes & Commercial Use 3

It has excellent heat preservation performance, which can minimize heat loss to the greatest extent and effectively reduce energy consumption.

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The material is mostly made of high-quality stainless steel, which has strong corrosion resistance and extends the service life.

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It offers a wide range of capacity specifications, allowing for selection as needed to meet the hot water demands of different families.

That is our highly-qualified employees. We have R&D experts, designers, QC professionals, and other highly qualified employees.

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It is equipped with safety devices such as pressure safety valves and temperature controllers to ensure safe use.

They outperform their competitors when it comes to durability and performance, deeply trusted by both domestic andforeign customers.

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As a distinguished national high-tech enterprise, Tongyi Heat Pump is dedicated to the research, development, and manufacturing of air-to-water heat pumps, providing residential and commercial renewable energy-saving solutions to thousands of clients worldwide.

Certification

Committed to Quality, Safety & Sustainability

ISO 9001, ISO 14001, and ISO 45001 certified — ensuring excellence, environmental care, and workplace safety in everything we do.