💧 InverSmart DM23 Variable Speed Pool Pump – 20m³/h @ 10m Head

🌊 The Smart Choice for Energy-Efficient Pool Circulation with Whisper-Quiet 36dB Operation

📋 Product Overview

The InverSmart DM23 is a premium variable-speed pool pump engineered for residential swimming pools demanding exceptional efficiency and near-silent operation. Powered by cutting-edge Permanent Magnetic Synchronous Motor (PMSM) technology combined with advanced inverter control, this pump delivers intelligent performance that adapts to your pool’s exact requirements.

With a maximum flow rate of 27 m³/h and head pressure up to 19 metres, the DM23 handles medium to large pools with ease, delivering optimal water circulation for effective filtration and consistent heating. The revolutionary InverSilence technology enables precise motor speed control down to single-revolution accuracy, meaning the pump runs only as hard as needed – dramatically reducing energy consumption and extending equipment lifespan.

Featuring an intuitive full touchscreen control panel, saltwater compatibility, and self-priming capability, the InverSmart DM23 represents the perfect balance of premium performance at an accessible price point. Backed by an industry-leading 5-year warranty, this pump pays for itself through energy savings in months, not years.

⭐ Key Features

✅ IE4-Rated PMSM Motor – The highest efficiency class available, delivering superior performance while consuming significantly less energy than traditional induction motors

✅ InverSilence Variable Speed Technology – Precise motor control adjustable from 30% to 100% capacity, running only at the speed your pool needs for maximum efficiency

✅ Ultra-Quiet 36dB Operation – Quieter than a refrigerator, operating at whisper-level noise perfect for residential settings near living spaces

✅ Full Touchscreen Control Panel – Real-time power consumption display, intuitive interface showing exactly how much energy you’re using at any moment

✅ 7-Day Programmable Timer – Set up to 4 filtration cycles per day across a full weekly schedule for completely hands-off operation

✅ One-Touch Backwash Mode – Instantly boosts to 100% capacity for filter cleaning, then returns to efficient running automatically

✅ Self-Priming Design – Reliable start-up even when installed up to 2 metres above water level, simplifying installation requirements

✅ Saltwater Ready – Fully compatible with salt-chlorinated pools up to 3.5% concentration, with corrosion-resistant construction

✅ Soft Start Technology – Gradual power-up from 0 amps to rated amperage protects electrical systems and extends motor life

✅ External Control Options – Digital input, RS485, and relay output connections for integration with pool automation systems

🔧 Technical Specifications

Specification	Detail
Model	InverSmart DM23
Motor Power (P₁)	1.10 kW
Motor Efficiency Class	IE4 – PMSM Technology
Voltage / Frequency	220–240 V, 50/60 Hz
Maximum Flow Rate (Qₘₐₓ)	27 m³/h
Flow @ 8m Head	25 m³/h
Flow @ 10m Head	20 m³/h
Maximum Head (Hₘₐₓ)	19 m
Speed Control Range	30% – 100%
Noise Level	~36 dB(A)
Pump Type	Variable Speed, Self-Priming
Recommended Pool Volume	40–70 m³
Salt Water Compatibility	Yes (up to 3.5% concentration)
Ambient Temperature Range	-10°C to +42°C
Water Temperature Range	5°C to 50°C
Maximum Installation Height	2 m above water level
Humidity Tolerance	<90% RH
Protection Class	IP55
Insulation Class	Class F
Control System	Full Digital Touchscreen
Timer Function	Up to 4 timers/day, 7-day week
Backwash Mode	One-touch operation
External Control	Digital input, RS485, Relay output
Packing Dimensions	585 × 255 × 325 mm
Warranty	5 Years

💰 Usage Costs & Running Expenses

Understanding your pump’s running costs is essential for budgeting and appreciating the true value of variable-speed technology. Below are detailed calculations based on realistic usage scenarios.

📊 Annual Running Cost Calculation

Base Parameters:

• Power consumption: 1.10 kW (maximum)
• UK electricity rate: £0.2635 per kWh (Q4 2025 price cap average)

Important Note: Variable-speed pumps rarely run at full power. For daily filtration, the InverSmart DM23 typically operates at 50-70% capacity, consuming approximately 0.55-0.77 kW. Our calculations show both maximum power scenarios and realistic variable-speed operation.

🏊 Scenario 1: Typical Residential Pool (Seasonal Use – 6 Months)

Running at 70% capacity for daily filtration:

• Actual power draw: ~0.77 kW
• Daily operation: 8 hours
• Season length: 180 days (April – September)
• Annual hours: 1,440 hours

Calculation:

• Energy consumed: 0.77 kW × 1,440 hours = 1,108.8 kWh/year
• ✅ Annual running cost: 1,108.8 × £0.2635 = £292.17 per year

♨ Scenario 2: Heated Pool with Extended Season (8 Months)

Running at 80% capacity to support heat pump circulation:

• Actual power draw: ~0.88 kW
• Daily operation: 10 hours
• Season length: 240 days (March – October)
• Annual hours: 2,400 hours

Calculation:

• Energy consumed: 0.88 kW × 2,400 hours = 2,112 kWh/year
• ✅ Annual running cost: 2,112 × £0.2635 = £556.51 per year

🌊 Scenario 3: Year-Round Indoor Pool

Running at 60% capacity for constant, efficient filtration:

• Actual power draw: ~0.66 kW
• Daily operation: 12 hours
• Days per year: 365 days
• Annual hours: 4,380 hours

Calculation:

• Energy consumed: 0.66 kW × 4,380 hours = 2,890.8 kWh/year
• ✅ Annual running cost: 2,890.8 × £0.2635 = £761.72 per year

📈 Comparison: InverSmart vs Traditional Single-Speed Pump

Traditional single-speed pumps must run at full power constantly, regardless of actual filtration needs. Using the manufacturer’s comparison data:

60m³ pool running 16 hours/day for 180 days (2,880 hours/year):

Pump Type	Power Draw	Annual Energy	Annual Cost
❌ Traditional Single-Speed 1.1kW	1.10 kW (constant)	3,168 kWh	£834.77
✅ InverSmart DM23 (variable)	~0.11 kW (average at low speed)	316.8 kWh	£83.48

💰 Annual Saving: £751.29 💷 10-Year Saving: £7,512.90

Note: The above comparison reflects optimal variable-speed operation at minimal required flow rates. Actual savings depend on your specific usage patterns but energy reductions of 80-90% are achievable when running at lower speeds.

🎯 Real World Examples & Applications

🏊‍♂️ Medium to Large Residential Pools

The DM23 is perfectly sized for pools between 40-70 m³, providing ample flow for complete water turnover within recommended timeframes. The 20 m³/h flow at 10m head handles typical residential plumbing with ease, while the variable speed allows you to dial in exactly the right circulation for your specific pool.

🔄 Upgrading from Traditional Single-Speed Pumps

If you’re replacing an older fixed-speed pump, the InverSmart DM23 transforms your pool’s operating economics immediately. The self-priming capability and standard fitting sizes make retrofitting straightforward, while the dramatic reduction in running costs means the investment begins paying dividends from day one.

☀ Seasonal UK Pool Operation

For pools operating April through September, the DM23’s programmable timer and variable speed perfectly match the changing demands of British weather. Run at lower speeds during cooler periods when algae growth is minimal, then increase circulation during hot spells – all automatically scheduled.

🛁 Saltwater Pool Systems

Fully certified for saltwater environments up to 3.5% salt concentration, the DM23’s corrosion-resistant construction ensures reliable long-term performance. The consistent, adjustable flow supports optimal salt chlorinator operation without the energy penalty of oversized traditional pumps.

🔥 Heat Pump Integration

When paired with pool heat pumps, the InverSmart DM23 delivers the steady, reliable flow that heat exchangers require for efficient operation. The variable speed capability means you can match flow rates precisely to your heater’s specifications, maximising heating efficiency whilst minimising pump energy use.

🏢 Holiday Lets & Rental Properties

For property owners seeking low-maintenance, energy-efficient pool operation, the touchscreen timer system allows completely automated scheduling. The quiet 36dB operation won’t disturb guests, while the real-time power display provides transparency on running costs.

💡 Cost Savings Examples

📍 Scenario: Upgrading from 10-Year-Old Single-Speed Pump

Your existing pump: Generic 1.1kW single-speed, running 8 hours daily, 6 months/year

❌ Old pump annual cost:

• 1.10 kW × 8 hours × 180 days = 1,584 kWh
• 1,584 × £0.2635 = £417.38/year

✅ InverSmart DM23 at 60% speed:

• 0.66 kW × 8 hours × 180 days = 950.4 kWh
• 950.4 × £0.2635 = £250.43/year

💰 Annual Saving: £166.95 ⏱ Payback Period: Approximately 2-3 years (based on typical upgrade cost) 📈 10-Year Saving: £1,669.50

📍 Scenario: Replacing Failed Pool Pump

When your existing pump fails, the choice between a budget single-speed replacement and the InverSmart DM23 becomes clear when you consider lifetime costs:

Option	Purchase Price	5-Year Running Cost	5-Year Total
❌ Budget Single-Speed	~£350	£2,086.90	£2,436.90
✅ InverSmart DM23	~£700	£1,252.15	£1,952.15

💷 5-Year Saving with InverSmart: £484.75

And that’s before considering the superior reliability, quieter operation, and 5-year warranty of the InverSmart.

📍 Scenario: High-Usage Indoor Pool

12 hours daily, year-round operation:

❌ Single-speed pump annual cost:

• 1.10 kW × 12 hours × 365 days = 4,818 kWh
• 4,818 × £0.2635 = £1,269.54/year

✅ InverSmart DM23 at 55% average speed:

• 0.605 kW × 12 hours × 365 days = 2,649.9 kWh
• 2,649.9 × £0.2635 = £698.25/year

💰 Annual Saving: £571.29 📊 Monthly Saving: £47.61 💷 5-Year Saving: £2,856.45

📥 Downloads & Resources

📄 InverSmart Product Factsheet – Key specifications and feature overview
Download Factsheet (PDF)

📄 InverSmart Technical Brochure – Comprehensive product information including performance curves, dimensions, and application data
Download Brochure (PDF)

🏆 Why Choose the InverSmart DM23

✅ Exceptional Energy Efficiency – IE4-rated PMSM motor technology delivers the highest efficiency available, with potential energy savings of up to 90% compared to single-speed alternatives

✅ Whisper-Quiet Operation – At just 36dB, the InverSmart operates quieter than a typical home refrigerator, making it ideal for poolside installation near living spaces

✅ Intelligent Variable Speed Control – Precise motor control from 30-100% means you only use the energy required, with real-time consumption displayed on the touchscreen

✅ Premium Quality at Accessible Price – Entry-level pricing for a pump that outperforms many manufacturers’ premium ranges, delivering genuine value

✅ Comprehensive 5-Year Warranty – Industry-leading manufacturer warranty provides complete peace of mind and demonstrates confidence in build quality

✅ Proven Payback – With documented energy savings, the InverSmart DM23 typically pays for itself within 1-2 years through reduced electricity bills

🛒 Why Buy From Parts4Tubs?

✅ Specialist Pool & Spa Expertise – Dedicated knowledge and experience in pool equipment, ensuring you get the right product for your specific application

✅ Competitive UK Pricing – Direct relationships with manufacturers mean genuine value without compromising on quality or support

✅ Fast UK Delivery – Efficient dispatch and reliable shipping to get your pool running efficiently as quickly as possible

✅ Technical Support – Access to knowledgeable staff who can assist with sizing, installation queries, and troubleshooting

✅ Trusted Supplier – Established reputation for quality products and excellent customer service in the UK pool and spa industry

✨ Summary

The InverSmart DM23 Variable Speed Pool Pump represents the smart choice for pool owners who value efficiency, quiet operation, and long-term value. Combining premium IE4-rated PMSM motor technology with intuitive touchscreen controls and robust 5-year warranty coverage, this pump delivers exceptional performance while dramatically reducing running costs. With potential energy savings of up to 90% compared to traditional pumps and whisper-quiet 36dB operation, the InverSmart DM23 pays for itself quickly while keeping your pool crystal clear – it’s simply the intelligent way to power your pool.