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Swimming pool heat pumps

HP INVENTOR2800 Compact

HP GREEN Inverter Pro |
HP PREMIUM for larger pool |
Tropical kit | up to 800 m³
Heating Output | HP INVENTOR - Microwell
Heating Output
25,8-33,5 kW
Cooling Output | HP INVENTOR - Microwell
Cooling Output
25 kW
COP | HP INVENTOR - Microwell
Operating Range | HP INVENTOR - Microwell
Operating Range
-15°C to +55°C
Pool size
120 m³
Colors list

Most efficient heating solution

MICROWELL HP Inventor is innovative pool water conditioning solution. With 28,4 kW capacity it is optimised for large pools (but it has a much wider use), delivering continuous and stable production of water heating or cooling. Designed on the principle of renewable energy source, MICROWELL HP Inventor is exceptionally efficiency, has low environment impact and low costs consumption; all a result of superior Microwell technology.

Accessories icon | Microwell Accessories
Truereal icon | Microwell Highlights
360 icon | Microwell 360 view
Video icon | Microwell Video
Description icon | Microwell Description
Specs icon | Microwell Tech. Data
Download icon | Microwell Downloads


HP INVENTOR - Microwell

360 view


Operating on the thermodynamic principle, which is considered to be one of the most energy efficient systems for water heating or water cooling, Microwell heat pumps are capable of extracting ambient air from any environment ensuring maximum performance with an efficiency that remains unsurpassed on the market.

Microwell swimming pool heat pumps are designed for heating or cooling the water in pools and hot tubs at minimum operational costs.

HP 2800 COMPACT INVENTOR is a powerful heat pump suited for pools up to 120m3 in volume.

HP 2800 COMPACT INVENTOR can provide up to 33,5kW of heating at typical seaside conditions of air temperature 26°C, water temperature 26°C and air humidity 80%. At typical inland conditions of air temperature 26°C, water temperature 26°C and air humidity 63% the heat pump provides with 23kW. At dry conditions with humidity 35% the pump reaches above 25.8kW heating output.

Self-cleaning color is a recent innovation by Microwell. Main purpose is to ensure fresh and new look of the heat pump after years of working in exterior.

The final finish is a special paint made on the basis of years of experience and the latest knowledge in the field of nanotechnology. Color has nanopore structure that creates a microscopic film on the surface of the heat pump. Nanopores are too small for a dust or dirt to be caught up at. Despite that should any dirt be gathered on the cover, it will be washed away with the first rain.

Self-cleaning color is a true innovation that brings value for the customer.

Heat and cool with one device. Heat pump HP 2800 COMPACT INVENTOR is designed for heating and cooling. The control is very simple. When you set your desired water temperature, the heat pump will automatically heat or cool to keep your desired temperature. HP 2800 COMPACT INVENTOR provides with up to 20.1 kW cooling output.

High efficiency. Swimming pool heat pump is designed to compensate higher investment costs by very low operational costs compared to electric or gas heater. Microwell heat pumps are designed for a maximum efficiency reaching COP values up to 7. Efficiency of the heat pump is a ratio between power consumption (energy you pay) and actual heating or cooling output (energy you receive). With electric heater, the ratio is 1=1, i.e. what you consume and pay you get in the form of heat. Gas heaters may reach efficiency of 1.3. Heat pump’s COP of 7 means that you pay for 1kWh and you get 7kWh of energy. In cooling mode the heat pump provides with solid ratio of 4. Heat pump’s advantage is that it is independent from sun, day or night and weather. Currently the heat pump is the most efficient way of water conditioning in pools or hot tubs.

How is heat pump so efficient? Microwell HP 2800 COMPACT INVENTOR heat pump is able to extract the heat/cold that is present in ambient environment and leveraged pass it into the pool water. If you take your refrigerator, it creates cold inside the fridge by releasing the heat from the back. Heat pump takes the heat (energy or calories) from ambient air and transforms it into the water. The surrounding air cools down in the process. When working in cooling mode, the excessive heat from water is passed into surrounding air. When heating, higher the ambient air temperature is, more free energy can the heat pump extract and thus reach higher efficiency. At favorable conditions you pay around 15% of heat, i.e. 85% of heat is free. Microwell heat pump is built on currently the most eco-friendly refrigerant R410A.

Compact / Split. Microwell heat pumps are designed as compact or split machines. A Compact unit (HP 2800 COMPACT INVENTOR) is a one-box device that requires water and electrical connection. Its advantage is simple and quick installation. Disadvantage is that it is typically installed few meters from pool which may lead into visual or noise disturbance. A split heat pump (HP 2800 SPLIT INVENTOR) is just like a split air conditioner or ceiling cassette air conditioner. The idea is to have warm or cool water at no visual or noise disturbance. Split heat pump can be installed as far as 30m away from pool. Typically the unit is hidden by the house, on the roof or in the backyard behind trees. This is also very safe for children.

Microwell heat pumps are sold throughout entire network of professional resellers with strong technical support. The distributors will gladly handle any of your pre and post sales technical matter.

HP 2800 COMPACT INVENTOR is equipped with Microwell unique microECONOMY+ feature offering the most economy circulation pump control. Microwell swimming pool heat pumps can be connected to existing water system (filtration) or it can have an individual circulation pump. A swimming pool heat pump needs continuous water flow to heat or cool. HP 2800 COMPACT INVENTOR tells the circulation pump when heat pump needs to heat or cool. The circulation is turned on and off according to this request. Microwell applies specially designed software that will sample the water and also put the whole system into sleep for the time when heating or cooling is not required. This saves precious energy and results in lower operational costs of the pool.

Full year heating. HP 2800 COMPACT INVENTOR is also designed for a full year heating, particularly winter time. Typical winter can experience air temperatures -15°C. Heat pump thus needs to be protected against possible frost damage and equipped with systems that will keep the heat pump’s performance at desired level.

Long livelihood. Microwell swimming pool heat pumps are designed for 15+ years livelihood. The product requires minimal maintenance. You only need to ensure cleanness of air exchanger from leaves, dust and other particles.

Titanium. Amount of titanium is very important to a swimming pool heat pump. The amount talks about the actual heat transfer area, i.e. power and efficiency of each heat pump. Microwell is proudly using 40% more titanium in heat pumps’ water exchangers. This maximizes the performance and efficiency COP&EER far ahead of others. HP 2800 COMPACT uses 1.1m2 of titanium whereas others use less than 0.25m2.

Microwell heat pump is only 1250mm high and 360mm deep. This saves space and does not protrude in the garden.

Microwell HP 2800 COMPACT INVENTOR consumes on average 3.59kW while heating to 28,4kW (air temperature 26°C, water temperature 26°C, relative humidity 63%) at 38dB(A) only confirms how well designed and manufactured the pumps are.

Control. The heat pump is controlled by built-in digital panel. This panel can be installed anyway in pool area, technical room or inside the house for your convenience.

Extra features. Microwell is continuously focusing on customers’ demands and wishes. Each heat pump is equipped with special features unique about Microwell heat pumps.

antiVIBRATION+ offering special set of mounting silent blocks eliminating excessive vibration and noise.

microECONOMY+ offering the most economical circulation pump control.

antiFREEZE+ offering non-stop antifreeze protection of your heat pump.

WINTER module allowing the pump to work down to -15°C of ambient air temperature.

Condensate tray defrost and Heat exchanger frost protection to complete the winter package and operations down to -15°C of ambient air temperature.

Microwell has been in business for 25 years, currently exporting to 30+ countries worldwide.

Typically, the unit is in stock near you. Due to many different ways the unit can be tailored on demand, it may take up to 10 days to deliver the unit to you.

If you need assistance in sizing the right heat pump for you please use our online HOW TO CHOOSE tool.

Or click on HOW CHOOSE A HEAT PUMP on the left side of your screen.

Read more

Technical data

Pool capacity (m³ / cover / no cover)
Heating capacity (kW / A26 / W26 / RH80%)
Heating capacity (kW / A26 / W26 / RH63%)
Heating capacity (kW / A26 / W26 / RH35%)
Heating capacity (kW / A15 / W26 / RH80%)
Heating capacity (kW / A15 / W26 / RH63%)
Heating capacity (kW / A15 / W26 / RH35%)
Heating capacity (kW / A27 / W15 / RH80%)
Cooling capacity (kW / A35 / W28 / RH80%)
Average COP
Power consumption (kW)
Operating temperature (°C)
Water flow (m³h / kPa)
Power supply (V AC/ph)
Heat exchanger (Titanium type)
Titanium surface (m²)
Acoustic pressure level(dB(A) / 1m / 2m / 4m / 8m)
Water circuit connection (mm / inch / thread)
Dimensions (WxHxD)
HP 1000/1100 Omega/Premium
13.1 - 13.9
10.7 - 11.3
9.7 - 10.3
10.3 - 10.9
8.4 - 8.9
7.6 - 8.1
6.8 - 8.2
4.2 - 7.9
1.74 - 1.88
-15 to +40
4-6 / 5-15 (1 - 5)
Titanium Gr 2 ASTM B338
0.43 - 0.60
50mm | 6/4 | Internal
from 840x680x310
HP 1700 Green Inverter pro
-15 to +43
Titanium Gr 1 ASTM B265
50mm | 6/4 | Internal
HP 2300/2400 Inventor/Premium
27.2 - 28.8
23.0 - 24.4
20.9 - 22.2
21.6 - 22.9
17.6 - 18.7
16.0 - 17.0
20.1 - 21.7
5.1 - 8.5
3.51 - 3.59
-15 to +40
8-10 / 5-15 (1-5)
Titanium Gr 2 ASTM B338
0.95 - 1.2
50mm | 6/4 | Internal
from 942x1250x360
HP 2800/3000 Inventor/Premium
33.5 - 35.5
28.4 - 30.1
25.8 - 27.4
27.1 - 28.7
22.9 - 24.3
20.8 - 22.1
25.0 - 26.8
5.1 - 8.5
4.34 - 4.44
-15 to +40
8-12 / 5-15 (1-5)
Titanium Gr 2 ASTM B338
1.2 - 1.4
50mm | 6/4 | Internal
from 942x1250x360
HP GREEN 1000/1400 on-off
40/30 - 65/45
7.8 - 14.2
8.2 - 11.8
7.8 - 10.8
8.5 - 12.2
7.0 - 10.0
6.4 - 9.1
4.1 - 6.0
4.6 - 4.7
1.74 - 2.57
-15 to +40
4 - 8 / 15
Titanium Gr 1 ASTM B265
0.42 - 0.48
50mm | 6/4 | Internal
from 986x657x340
HP GREEN 1100/1500 Inverter Pro
65/30 - 80/40
10.8 - 15
9.0 - 12.5
8.4 - 11.4
9.4 - 12.8
7.7 - 10.5
7.0 - 9.5
12.4 - 17.3
4.5 - 6.7
4.5 - 15.0
0.2 - 2.28
-10 to +43
3.5 - 4 / 14
Titanium Gr 2 ASTM B338
0.52 - 0.7
50mm | 6/4 | Internal
HP GREEN 2100/2700 Inverter Pro
105/50 - 135/60
21.0 - 27.5
19.5 - 23.5
17.8 - 21.9
19.1 - 24.7
14.8 - 19.4
14.1 - 18.5
24.2 - 31.6
9.5 - 11.9
4.6 - 15.0
0.41 - 3.91
-10 to +43
230/1 - 400/3
Titanium Gr 2 ASTM B338
0.9 - 1.0
50mm | 6/4 | Internal
from 954x748x429

Manufacturer reserves the right to change the technical data without notice.