The series is designed for hot water supply in factories, schools, hotels, office buildings, hospitals, commercial places.
Features Technical Parameters Working principle

Product Application:
· For house heating & hot water
· Hot water for school, hotel, factory, office building etc. 

Product Features:
Daishiba commercial water cycle hot water heat pump provides energy-efficient hot water for domestic and commercial application, such as school, hotel, factory, office building. Using free renewable energy from the air the units are highly efficient with low running costs, low carbon emission. It’s efficiency can be up to 3~4 times more than conventional gas boiler or electrical heater.

◆  Safe and reliable
Electric power and the life water are separated, security coefficient is high.

◆  Efficient and energy-saving
Heat pump absorb lot of hot energy from air freely, all the consumed power just use to collect energy in the air by compressor, so it consumes just a quarter of the traditional electric heater, saving lot of electric cost for the user.

◆  Green and environmental protection
By using solar energy, air hot energy and electric energy, there is no harmful gas being discharged during the work of heat pump.

◆  Usable all-weather
Heat pump is free form the effect of weather. It could offer hot water all the day around the whole year.

◆  Endurable
Advanced, world famous components of the heat pump guarantee high quality and a long life span.

◆  Wide application
Units of different capacity of this series are available, which could meet different places’ requirements, family, school, factory, hotel, hospital, bath center etc. heating capacity from 17kw~80kw.


Q1: Are you a factory or trading company?
A: We are the factory, and especially R&D, manufacturer and sell various heat pump euipment. We have engaged in the heat pump R&D and production over 10 years.

Q2: How to find a heat pump suitable for my product?
A: a. Tell us about your product details;

b. What functional heat pump products do you need;

c. Tell us your local minimum ambient temperature and maximum ambient temperature to recommend products that meet your needs;
d. Power supply specifications and special requirements used in your country. 

Q3: Is engineer available to serve oversea?
A: Yes, but the travel fee is paid by you. So actually to save your cost, We provide installation instructions and 24-hour online service and assist you till the end.

Q4: What is the payment term?

A: 30% T/T deposit and 70% T/T balance payment before shipping (If you purchase a sample that requires 100% payment, In order to avoid second payment, bank deduction fees will be generated again). Online trade assurance order, L/C, or as negotiated terms with clients.


Q5: How long is the warranty time?
A: 1 years of warranty. In guarantee period, if spare part broken, we will send you the parts free and we will pay the express fee. And please send us the spare parts back. when machine is out of guarantee period, we will provide you the spare parts by charge.

Q6: How can we make sure about the machine quality after we put the order?
A: Before delivery, we will send you the pictures for you to check the quality, and also you can arrange for quality checking by yourself or by your contacts in China.

Q7: We are afraid you won't send us the machine after we send you the money?
A: Please note our above business license and certificate. And if you don't trust us, then we can use Alibaba trade assurance service, guarantee your money, and guarantee your machine's on-time delivery and machine quality..

Q8: Why we should choose your company?
A: We are a professional heat pump manufacturer over 10 years, and we provide better after-sales service. We guarantee no risk for our deal.

Model Unit DRST-11H DRST-18H/3 DRST-35H/3 DRST-45H/3 DRST-55H/3 DRST-70H/3 DRST-90H/3 DRST-180H/3
HP 3HP 5HP 10HP 12HP 16HP 20HP 25HP 50HP
Heating area m2 50~75 75~110 180~250 180~250 250~350 350~450 450~550 800~1000
Hot water Heating capacity kW 11.2 18 36.3 43.7 54.4 69.8 87.4 175
Power input kW 2.4 3.9 7.8 9.45 11.6 15.23 18.85 37.7
Input current A 11.5 7.41 14.81 17.94 22.03 28.92 35.8 71.6
COP W/W 4.67 4.62 4.65 4.62 4.69 4.58 4.64 4.64
Heating Heating capacity kW 7.9 13 27.5 32.5 42 52 68 136
Power input kW 2.4 3.9 7.8 9.45 11.6 15.23 18.85 37.3
Input current A 11.48 7.41 14.81 17.94 22.03 28.92 35.8 71.6
COP W/W 3.3 3.3 3.5 3.4 3.6 3.4 3.6 3.6
Power supply V/Hz/Ph 220/50/1 380/50/3
Compressor type / Scroll
quantity / 1 1 2 2 2 2 2 4
Fan type / Low noise high efficiency axial type
quantity / 1 1 2 2 2 2 2 4
Heat exchanger type / High efficiency tube in shell heat exchanger
Throttling device / Emerson thermal expansion valve
Refrigerant / R22
Fan discharging / Vertical
Ambient temperature -7℃~43℃
Noise in 1 meter distance dB(A) 59 62 63 63 66 68 68 72
Water pipe size inch R1 R1 R1-1/2 R1-1/2 Rc2 Rc2-1/2 Rc2-1/2 2*Rc2-1/2
Circulating water flow m3/h 1.9 3.1 6.2 7.5 9.3 12 15 30
Dimensions mm 710*710*795 810*810*995 1450*705*1375 1445*850*1850 1990*980*2045
Net weight kg 99 137 276 305 380 552 586 1160
Testing condition:
Hot water: Ambient temp.(DB/WB)=20℃/15℃; Water temp.(input/output)= 15℃/55℃.
Heating: Ambient temp.(DB/WB)=7℃/6℃; Water temp.(input/output)= 40℃/45℃.

How does a heat pump work?

Heat pump uses electrical energy and take low grade heat energy from the outdoor air to heat refrigerant which in turn heats water for domestic use and space heating. The efficiency of a heat pump is known as the coefficient of performance or COP. This is a ration of the heat delivered to power consumed.

At the beginning of the first phase the refrigerant is cold low pressure liquid.

1. The refrigerant passes into the evaporator and heat energy from the outside air passes over the evaporator causing the refrigerant to increase in pressure and change to warm vapor.

2. This warm vapor then enters the compressor as it passed across one side of a plate heat exchanger, and this is transferred via the pimary water circuit to heat up the water tank.

3. The hot refrigerant gas is the temperature, the cool vapor still has a high pressure and to reduce this pressure the vapor passes through an expansion valve. This cause the pressure to drop and the temperature lowers, returning the refrigerant to its initial state of cool low pressure liquid.

This process is repeated.

It is only the refrigerant that passes through this cycle; the water is heated as it travels tthrough the plate heat exchanger. The heat energy from the refrigerant passes through the plate heat exchanger to the cooler water which increase in temperature. This heated water enters the home heating circuit and also be used to provide domestic hot water via a hot water tank.