💧 InverHero IH40 Variable Speed Pump – Flagship PMSM Performance for Large & Commercial Pools

The ultimate 1.75kW full-inverter pump delivering massive 35.6 m³/h flow rates while slashing energy bills by up to 87% – engineered for pools 80-120m³ demanding uncompromising performance

📋 Product Overview

The InverHero IH40 stands as the flagship of the InverHero range, delivering the flow capacity and head pressure that large residential and commercial pools demand. This 1.75kW powerhouse combines full-inverter control with an advanced Permanent Magnet Synchronous Motor (PMSM) to provide exceptional water turnover for pools between 80-120m³ – all while consuming a fraction of the energy of traditional high-power single-speed pumps.

Where conventional pumps of this capacity would consume 2-3kW running at fixed maximum output, the IH40’s intelligent variable speed operation typically runs at 30-50% capacity for standard filtration, dramatically reducing energy consumption while still delivering the turnover rates large pools require. The PMSM motor generates precise, controlled torque across its entire 8-35 m³/h adjustable range, from gentle overnight circulation to maximum-power backwash cycles.

The integrated smart controller features self-learning capability that automatically maps your system’s pressure characteristics upon installation. As filter loading increases throughout the week, the IH40 progressively adjusts motor speed to maintain your target flow rate – no manual intervention required. With built-in WiFi connectivity for remote monitoring via the InverFlow app, four programmable timer zones for sophisticated scheduling, and comprehensive external control options including RS485 Modbus for professional automation systems, the IH40 delivers commercial-grade capability with residential-friendly operation.

⭐ Key Features

✅ 1.75kW Full-Inverter PMSM Motor – Flagship capacity delivers exceptional flow rates up to 40.3 m³/h with 20.5m maximum head, providing the muscle large pools and demanding systems require while maintaining class-leading efficiency

✅ Intelligent Self-Learning Auto-Inverter Mode – Advanced algorithm automatically maps your system’s unique pressure profile and continuously optimises motor speed to maintain target flow rates as conditions change throughout the filtration cycle

✅ Professional WiFi Control via InverFlow App – Monitor real-time power consumption, adjust flow settings, programme schedules, and receive system alerts remotely – complete pool management from your smartphone anywhere in the world

✅ Four Independent Timer Zones – Create sophisticated daily schedules with different flow rates or capacity settings for each period, enabling advanced filtration strategies that balance water quality, feature operation, and energy efficiency

✅ Three-Preset Skimmer Mode – Automated surface debris management with configurable programmes that periodically boost pump speed to clear floating contaminants, maintaining pristine water surface appearance

✅ Commercial-Grade Self-Priming – Robust automatic priming sequence with adjustable countdown up to 1500 seconds ensures reliable startup even after extended shutdown periods or major maintenance work

✅ Exceptionally Quiet Operation – Despite its 1.75kW capacity, PMSM technology and variable speed control deliver remarkably low noise levels, making residential installation viable even for this commercial-class pump

✅ Multi-Format Flow Display – Real-time circulation monitoring with selectable units (m³/h, LPM, Imperial GPM, US GPM) displayed on the professional-grade digital controller

✅ Comprehensive External Control Integration – Full automation capability via RS485 Modbus protocol, analog input (0-10V or 0-20mA), or digital switching for seamless integration with building management and pool automation systems

✅ Industrial-Grade Protection Systems – Complete safeguards including dry-run detection, high-temperature protection with automatic speed reduction, undervoltage monitoring, phase protection, and loss-of-prime alerts

🔧 Technical Specifications

Specification	Detail
Model	InverHero IH40
Recommended Pool Volume	80-120 m³
Motor Type	PMSM (Permanent Magnet Synchronous Motor)
Maximum Power Input (P1)	1.75 kW
Voltage	220-240V / 50-60Hz
Maximum Flow Rate (Qmax)	40.3 m³/h
Maximum Head (Hmax)	20.5 m
Flow Rate at 8m Head	35.6 m³/h
Flow Rate at 10m Head	32.0 m³/h
Default Adjustable Flow Range	8-35 m³/h
Variable Speed Range	30% – 120% capacity
Connection Size	2″ unions (included)
Union Compatibility	48.5 / 50 / 60.3 / 63mm
Cable Length	2.5m
Operating Temperature (Ambient)	-10°C to 42°C
Water Temperature Range	5°C to 50°C
Salt Pool Compatibility	Up to 0.5% (5g/L)
Maximum Installation Height	2m above water level
Humidity Tolerance	≤90% RH (at 20°C ±2°C)
Insulation Class	Class F, IP55
Communication	Built-in WiFi, RS485 Modbus
External Control Options	Digital input (4-pin), Analog input (0-10V or 0-20mA), RS485
Warranty	2 Years

💰 Usage Costs & Running Expenses

📊 Annual Running Cost Calculation

Large pools have traditionally meant large energy bills. The InverHero IH40 transforms this equation – delivering the substantial flow rates 80-120m³ pools require while consuming up to 87% less energy than equivalent single-speed pumps.

Base Energy Rate Used: £0.26 per kWh (UK average, Q4 2025 – Ofgem Price Cap)

🏊 Scenario 1: Large Seasonal Residential Pool (6 Months Operation)

Running at optimal efficiency (approximately 40% capacity for standard filtration):

Parameter	Value
Average Power Draw	0.28 kW (at 40% capacity)
Daily Runtime	10 hours
Season Length	180 days (April – September)
Total Annual Hours	1,800 hours

✅ InverHero IH40 Annual Cost:

• 0.28 kW × 1,800 hours × £0.26 = £131.04 per year

❌ Traditional Single-Speed Pump (2.2 kW) Annual Cost:

• 2.2 kW × 1,800 hours × £0.26 = £1,029.60 per year

💰 Annual Saving: £898.56

♨ Scenario 2: Year-Round Large Heated Pool (12 Months Operation)

For substantial heated pools requiring extended daily circulation:

Parameter	Value
Summer (6 months)	12 hours/day at 50% capacity (0.44 kW)
Winter (6 months)	8 hours/day at 40% capacity (0.28 kW)

Summer Energy:

• 0.44 kW × 12 hours × 180 days = 950.4 kWh

Winter Energy:

• 0.28 kW × 8 hours × 180 days = 403.2 kWh

Total Annual Energy: 1,353.6 kWh

✅ InverHero IH40 Annual Cost:

• 1,353.6 kWh × £0.26 = £351.94 per year

❌ Traditional Single-Speed Pump Annual Cost:

• Summer: 2.2 kW × 12 hours × 180 days = 4,752 kWh
• Winter: 2.2 kW × 8 hours × 180 days = 3,168 kWh
• Total: 7,920 kWh × £0.26 = £2,059.20 per year

💰 Annual Saving: £1,707.26

🏢 Scenario 3: Commercial-Style Extended Operation (16 Hours Daily)

For pools with high usage demands or water features requiring extended circulation:

Parameter	Value
Daily Runtime	16 hours
Operating Capacity	35% (efficient filtration mode)
Power Draw	0.21 kW
Season Length	180 days

✅ InverHero IH40 Annual Cost:

• 0.21 kW × 16 hours × 180 days × £0.26 = £157.25 per year

❌ Traditional Single-Speed Pump Annual Cost:

• 2.2 kW × 16 hours × 180 days × £0.26 = £1,647.36 per year

💰 Annual Saving: £1,490.11

🏢 Scenario 4: Commercial 24/7 Year-Round Operation

For commercial facilities, hotels, or leisure centres requiring continuous circulation:

Parameter	Value
Daily Runtime	24 hours
Operating Capacity	40% average (variable throughout day)
Power Draw	0.28 kW average
Annual Days	365 days

✅ InverHero IH40 Annual Cost:

• 0.28 kW × 24 hours × 365 days × £0.26 = £637.73 per year

❌ Traditional Single-Speed Pump Annual Cost:

• 2.2 kW × 24 hours × 365 days × £0.26 = £5,010.72 per year

💰 Annual Saving: £4,372.99

📈 Energy Comparison Summary

Operation Type	InverHero IH40	Single-Speed Pump	Annual Saving
Seasonal (10 hrs, 6 months)	£131.04	£1,029.60	£898.56
Year-Round Heated	£351.94	£2,059.20	£1,707.26
Extended 16-Hour Seasonal	£157.25	£1,647.36	£1,490.11
Commercial 24/7 Year-Round	£637.73	£5,010.72	£4,372.99

Calculations based on UK electricity rate of £0.26/kWh (Ofgem Q4 2025 Price Cap). Actual savings depend on usage patterns, local energy rates, and system configuration.

🎯 Real World Examples & Applications

🏊‍♂ Large Residential Pools (80-120m³)

The IH40 is purpose-built for substantial domestic pools where impressive water turnover is essential. With 35.6 m³/h flow at 8m head, even a 120m³ pool achieves complete circulation in approximately 3.4 hours. For pools at this scale, the IH40’s variable speed capability transforms what would typically be £1,000+ annual energy bills into manageable three-figure sums.

🏢 Boutique Hotels and Guest Houses

Small hospitality properties with pools in the 80-120m³ range benefit enormously from the IH40’s combination of commercial flow capacity and intelligent energy management. WiFi connectivity enables remote monitoring across multiple properties, while the robust construction handles continuous duty cycles. Energy savings often exceed £1,700 annually compared to traditional pumps.

🏠 Holiday Parks and Rental Properties

For holiday letting businesses, pool running costs directly impact profitability. The IH40’s ability to maintain excellent water quality while minimising energy consumption – plus remote monitoring for peace of mind – makes it ideal for rental property portfolios. The self-learning capability ensures optimal operation without requiring on-site adjustment.

🔄 Replacing Aging High-Power Single-Speed Pumps

Many large pools run 2-3HP (1.5-2.2kW) single-speed pumps that consume staggering amounts of energy. The IH40 delivers superior flow performance while reducing energy consumption by up to 87%. With potential annual savings exceeding £4,000 for 24/7 commercial operations, return on investment can be measured in months rather than years.

🌊 Pools with Extensive Water Features

Large installations with multiple water features, waterfalls, deck jets, or spillways demand serious flow capacity. The IH40’s 40.3 m³/h maximum output handles even complex feature arrangements. Programme high-capacity timer periods when features operate, reverting to efficient low-speed circulation overnight.

☀ Large Solar and Heat Pump Heated Pools

Substantial heated pools present the greatest savings opportunity. The IH40’s precise speed control maximises heat transfer during collection periods while minimising pumping energy. For year-round heated pools, annual savings of £1,700+ transform the economics of pool heating.

🏋️ Swim Training and Lap Pools

Dedicated training pools and lap pools often feature counter-current systems requiring boosted flow during use. The IH40 can be programmed to deliver maximum output during training sessions while maintaining efficient background circulation at other times – all automated through timer programming or external control triggers.

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💡 Cost Savings Examples

📍 Scenario: Replacing a 2.2kW Single-Speed Pump

Situation: Your existing high-power pump runs 10 hours daily for a 6-month season.

❌ Current Annual Running Cost:

• 2.2 kW × 1,800 hours × £0.26 = £1,029.60/year

✅ InverHero IH40 at 40% Capacity:

• 0.28 kW × 1,800 hours × £0.26 = £131.04/year

💰 Annual Saving: £898.56 📈 5-Year Saving: £4,492.80 ⏱ Payback Period: Approximately 1.1 years (based on RRP of £1,023)

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📍 Scenario: Commercial Pool Running 24/7 Year-Round

Situation: Hotel or leisure facility pool requiring continuous circulation.

❌ Traditional Pump (2.2kW, 24 hours × 365 days):

• 2.2 kW × 8,760 hours × £0.26 = £5,010.72/year

✅ InverHero IH40 (Variable speed averaging 0.28 kW):

• 0.28 kW × 8,760 hours × £0.26 = £637.73/year

💰 Annual Saving: £4,372.99 📈 3-Year Saving: £13,118.97 ⏱ Payback Period: Under 3 months

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📍 Scenario: Large Year-Round Heated Residential Pool

Situation: 100m³ heated pool requiring 12 hours daily circulation year-round.

❌ Traditional Pump (2.2kW, 12 hours × 365 days):

• 2.2 kW × 4,380 hours × £0.26 = £2,505.36/year

✅ InverHero IH40 (Variable speed averaging 0.35 kW):

• 0.35 kW × 4,380 hours × £0.26 = £398.58/year

💰 Annual Saving: £2,106.78 📈 5-Year Saving: £10,533.90 ⏱ Payback Period: Under 6 months

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📍 Scenario: Upgrading from Dual-Pump Installation

Situation: Some large pools run two smaller pumps in parallel. The IH40 can often replace both with a single, more efficient unit.

❌ Two × 1.1kW Pumps Running Together (10 hours daily, 6 months):

• 2.2 kW × 1,800 hours × £0.26 = £1,029.60/year

✅ Single InverHero IH40 at 45% Capacity:

• 0.35 kW × 1,800 hours × £0.26 = £163.80/year

💰 Annual Saving: £865.80 📈 Additional Benefits: Simplified maintenance, single point of control, reduced installation complexity

📥 Downloads & Resources

📄 InverHero Installation & Operation Manual – Comprehensive 25-page technical guide covering installation requirements, all operating modes, WiFi configuration via InverFlow app, RS485 and external control wiring diagrams, error code reference, troubleshooting procedures, and maintenance schedules (PDF)

📄 InverHero Product Brochure – Complete overview of the InverHero range including IH40 flagship specifications, PMSM technology explanation, energy efficiency comparisons, and application guidelines (PDF)

🏆 Why Choose the InverHero IH40?

✅ Flagship Capacity for Demanding Pools – With 35.6 m³/h flow at 8m head and maximum output of 40.3 m³/h, the IH40 delivers the water turnover rates that pools 80-120m³ genuinely require – no compromises

✅ Transformational Energy Savings – Full-inverter PMSM technology reduces energy consumption by up to 87% compared to equivalent single-speed pumps, with annual savings exceeding £4,000 possible for commercial 24/7 operations

✅ Commercial-Grade Intelligence – Self-learning auto-inverter mode, four programmable timer zones, professional WiFi monitoring, and RS485 integration deliver the control sophistication commercial installations demand

✅ Industrial Build Quality – IP55 rated enclosure, Class F insulation, -10°C to 42°C operating range, and salt pool compatibility to 5g/L ensure reliable performance in the most demanding conditions

✅ Surprisingly Quiet – Despite its 1.75kW capacity, PMSM technology and variable speed control deliver noise levels that make residential installation entirely practical

✅ Exceptional Return on Investment – With potential annual savings of £900-£4,400 depending on usage, payback periods as short as 3 months are achievable, followed by decades of continued savings

🌟 Why Buy From Parts4Tubs?

✅ Large Pool Expertise – Specialist knowledge of high-capacity circulation systems ensures accurate sizing advice and professional installation guidance for demanding applications

✅ Direct Competitive Pricing – Strong supplier relationships deliver flagship equipment at fair prices without inflated commercial markups

✅ Priority UK Dispatch – Stock held in the UK for rapid delivery when equipment is needed urgently

✅ Professional Technical Support – Experienced team available for complex system integration, WiFi configuration, RS485 setup, and troubleshooting

✅ Complete Documentation Package – Full access to manufacturer manuals, technical specifications, wiring diagrams, and installation guides

✅ Genuine Warranty-Backed Products – Authorised supply of authentic InverHero equipment with full 2-year manufacturer warranty coverage and ongoing support

✨ Summary

The InverHero IH40 Variable Speed Pump represents the pinnacle of the InverHero range, delivering flagship 1.75kW performance for pools between 80-120m³. With its advanced PMSM motor providing 35.6 m³/h at 8m head, intelligent self-learning flow control, comprehensive WiFi and automation connectivity, and remarkably quiet operation for its capacity class, the IH40 transforms the economics of large pool ownership. Annual savings of £900-£4,400 mean payback periods measured in months rather than years, with decades of continued energy savings to follow. For pools demanding uncompromising performance without uncompromising energy bills, the IH40 is the clear choice – backed by a full 2-year manufacturer warranty and professional technical support.