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Aquark Mr Silence MS21 – Inverter Pool Heat Pump (21kW)
Ultra-Quiet. Compact Power. Built for Year-Round Comfort.
The Aquark Mr Silence MS21 is the perfect low-capacity inverter heat pump for small pools or spas, combining whisper-quiet performance with exceptional energy efficiency. Designed with InverPad technology and a patented back-discharge airflow system, it eliminates traditional noise and vibration — making it quieter than a household fridge.
Running at just 50% capacity for 95% of the pool season, the MS21 ensures precise, energy-saving temperature control with minimal sound. With the advanced Stepless DC Inverter system, it intelligently adapts to real-time heating demands while drawing up to 90% of energy from ambient air.
Compact, quiet, and incredibly efficient, the MS21 also features a sleek design and an intuitive built-in touchscreen controller for effortless control.
Why Choose the Mr Silence MS21?
Ultra-Quiet Design – Operates at just 15.5–24.2 dB(A) at 10m — quieter than a fridge
Stepless DC Inverter – Adjusts output dynamically for top-tier efficiency and control
InverPad Innovation – Eliminates mechanical and airflow noise for silent operation
Ideal for Small Pools & Spas – Compact yet powerful solution for pools up to 10 m³
Touchscreen Controller – Intuitive interface for easy operation and temperature control
Eco-Friendly Refrigerant – Uses R32 for improved performance and lower environmental impact
Specifications:
Model: Aquark Mr Silence MS21
Heating Capacity (A27/W27): 21 kW
Heating Capacity (A15/W25): 1.6 kW
COP (A27/W27): 14.2 – 6.8
COP (A15/W25): 6.9 – 4.2
Average COP: 9.2
Pool Volume Range: Up to 10 m³
Nominal Flow Volume: 1 – 2 m³/h
Noise Level (1m): 35.8 – 44.5 dB(A)
Noise Level (10m): 15.5 – 24.2 dB(A)
Sound Power: 38 dB
Installation: Outdoor
Refrigerant: R32
Connection Size: 50mm
Dimensions:
Height: 585 mm
Width: 760 mm
Depth: 310 mm
Weight: 28 kg
Seasonal Use: All Year
Electrical Information:
Input Power: 0.11 – 0.62 kW
Current Rating: 0.5 – 2.7 A
Maximum Operating Current: 3.8 A
Power Supply: 220–240V / 50Hz
Returns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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