I-PAC PRO 36B Side-Outlet Inverter Heat Pump (3-Phase) – All Year Round Pool Heating 🔥❄️

Transform your swimming pool into a year-round oasis with the most powerful heat pump in the I-PAC PRO range. Engineered for commercial facilities, large residential pools, and spa systems, the I-PAC PRO 36B delivers exceptional 40.5kW heating capacity while maintaining whisper-quiet operation down to –20°C.

This three-phase inverter heat pump combines cutting-edge R32 eco-refrigerant technology, titanium construction, and intelligent WiFi control to provide the ultimate in energy-efficient pool heating and cooling – all year round, in any climate.

Unmatched All-Season Performance Operating flawlessly in extreme conditions from –20°C to +43°C ambient temperature, this heat pump ensures your pool stays perfectly heated even during harsh winters or scorching summers. With 40.5kW heating capacity in Turbo mode and 20kW cooling capacity, you’re covered year-round.

Commercial-Grade Power for Serious Pools The I-PAC PRO 36B is purpose-built for large residential pools, commercial installations, hotel and spa facilities, therapy pools, health clubs, and wellness centers. If you need reliable, powerful, whisper-quiet heating that won’t let you down, this is your solution.

Exceptional Energy Efficiency Variable-speed inverter compressor technology delivers COP (Coefficient of Performance) ratings of 7.3 to 20 in Perfect Mode. That means for every 1kW of electricity consumed, you get up to 20kW of heating – dramatically reducing operating costs compared to traditional heating methods.

Library-Quiet Operation with Silence Mode At just 19.9 dB(A) at 10 meters in Silence Mode, this heat pump is quieter than a whisper. The innovative “Silence Mode” reduces noise levels by approximately 5 dB compared to previous models, making it ideal for noise-sensitive residential areas, hotels, and spa environments.

Smart WiFi Control from Anywhere Built-in WiFi connectivity and the dedicated Pooltherm App (iOS & Android) let you monitor temperatures, adjust settings, and control your heat pump from anywhere in the world. Perfect for facility managers and homeowners who want complete control at their fingertips.

Eco-Friendly R32 Refrigerant Compliant with EU F-Gas regulations, R32 refrigerant offers 675 Global Warming Potential – significantly lower than legacy refrigerants – while delivering superior energy efficiency and environmental responsibility.

Built to Last in Pool Environments Premium titanium heat exchanger provides exceptional corrosion resistance against pool chemicals, salt water (up to 35,000 ppm), and harsh conditions. Durable aluminum alloy weatherproof cabinet with anti-vibration mounts ensures years of trouble-free operation.

📊 Complete Technical Specifications

Performance Data

Operating Condition	Specification
Heating Capacity (Turbo Mode)	40.5 kW @ 27°C air / 27°C water
Heating Capacity (Perfect Mode)	32.5 kW @ 27°C air / 27°C water
Heating at 15°C Air	29 kW (Turbo) / 23.5 kW (Perfect)
Heating at 5°C Air	27.5 kW
Heating at -10°C Air	14.9 kW
Cooling Capacity	20 kW @ 35°C air / 28°C water
COP Range (Perfect Mode)	7.3 to 20
Average COP at 50% Speed	14.7

Electrical Specifications

Parameter	Specification
Power Supply	400V, 3-Phase, 50Hz
Rated Input Power	0.67 – 5.58 kW
Rated Input Current	0.97 – 8.09 A
Maximum Input Current	12.5 A
Rated Fuse	aM type / 16A
MCB Type	Type C / 16A
RCD Type	Type B / 30mA

Operating Parameters

Parameter	Range
Ambient Air Temperature	–20°C to +43°C
Water Heating Range	18°C to 40°C
Water Cooling Range	5°C to 30°C (water outlet 12-30°C setpoint)
Recommended Water Flow	12 – 18 m³/h
Water Pressure Drop	22 kPa
Maximum Air Flow	8,300 m³/h

Physical Specifications

Specification	Details
Dimensions (L×D×H)	1364 × 536 × 954 mm
Packed Dimensions	1435 × 560 × 1115 mm
Net Weight	147 kg
Water Connections	50mm or 48.3mm Female unions (included)
Sound Level @ 10m	19.9 – 30.5 dB(A)
Refrigerant Type	R32 (GWP 675)
Refrigerant Charge	3.6 kg (CO₂ equivalent: 2.43 tonnes)

📥 Downloads & Technical Documentation

Access complete installation guides, technical specifications, and product brochures:

📄 I-PAC PRO Installation Manual (opens in new tab) Comprehensive 50-page installation guide covering positioning, electrical connections, plumbing, WiFi setup, maintenance procedures, troubleshooting codes, and winterization protocols. Essential reading for installers and service technicians.

📄 I-PAC PRO Product Brochure (opens in new tab) Full product range overview with detailed technical data, performance graphs, sizing charts for domestic and commercial pools, control panel guide, and dimensional drawings. Includes pool sizing examples for year-round and seasonal operation.

🎯 Key Features & Benefits

Advanced Inverter Technology

✅ Variable-Speed DC Twin Rotary Compressor – Automatically adjusts output from 20% to 100% capacity based on demand, maximizing efficiency and extending equipment life

✅ DC Brushless Fan Motor – Ultra-quiet operation with superior energy efficiency compared to conventional AC motors

✅ Soft Start Function – Reduces power surges during startup, protecting your electrical system and heat pump components

Three Intelligent Operating Modes

🚀 Turbo Mode (100% to 20% capacity) Fast heat-up for rapid temperature recovery. Ideal when you need maximum heating power quickly – perfect for pool parties, events, or after heavy rain.

⚡ Perfect Mode (80% to 20% capacity) Intelligent optimization based on ambient air and pool water temperatures. Delivers the best balance of performance and energy efficiency for everyday use. This is the recommended mode for most applications.

🔇 Silence Mode (50% to 20% capacity) Ultra-quiet operation ideal for noise-sensitive environments, nighttime operation, or residential areas. Reduces sound levels by ~5 dB while maintaining efficient heating.

All-Weather Reliability

❄️ Extreme Cold Performance – Continues heating effectively down to –20°C ambient temperature. Automatic defrost with reverse cycle rapid defrosting using four-way valve technology

☀️ Hot Climate Cooling – 20kW cooling capacity keeps pools refreshingly cool in hot weather (up to +43°C ambient)

🌡️ Auto Mode – Automatically switches between heating and cooling based on pool temperature, maintaining your perfect water temperature year-round

Smart Control & Monitoring

📱 Built-In WiFi Module – Control and monitor from anywhere using the Pooltherm App (iOS & Android)

🖥️ Touchscreen Control Panel – Displays real-time inlet/outlet water temperatures, power consumption, compressor speed, operating mode, and fault codes

🎛️ Optional Remote Control Panel – Wired remote with 10-meter cable available for installations where the heat pump is positioned away from main control area

🔄 Over-The-Air Updates – Future-proof firmware updates can be applied remotely without service visits

⚠️ Remote Diagnostics – Dantherm technicians can monitor performance and diagnose issues remotely, reducing downtime

Professional-Grade Construction

🛡️ Titanium Twisted Heat Exchanger – Superior corrosion resistance against chlorine, bromine, salt water, and pool chemicals. Longer lifespan than copper or stainless steel

🏗️ Aluminum Alloy Weatherproof Cabinet – Durable enclosure designed to withstand harsh outdoor conditions

🔩 Anti-Vibration Mounts – Included rubber mounts minimize operational noise and structural vibration transmission

💧 Condensate Drainage Kit – Complete kit with adaptor and flexible hose included for proper water drainage

Comprehensive Protection Systems

⚡ Electronic Expansion Valve (EEV) – Precise refrigerant flow control for optimal efficiency across all conditions

🛡️ High & Low Pressure Protection – Automatic safety shutoffs prevent compressor damage

🔌 Fully Protected Electrical System – Built-in fault detection and reporting with clear diagnostic codes

❄️ Frost Protection Mode – Automatically circulates water when ambient temperature approaches freezing

Complete Installation Package

Every I-PAC PRO 36B includes:

✅ Four rubber anti-vibration mounts ✅ Winter cover for seasonal protection ✅ Two 50mm and two 48.3mm female water union connectors ✅ Condensate drainage kit (adaptor + flexible hose) ✅ Comprehensive owner installation manual ✅ 5-year on-site parts and labour warranty

🏊 Pool Sizing & Heat-Up Time Guide

Recommended Pool Sizes

The I-PAC PRO 36B is suitable for:

Seasonal Operation (March–November, ~38-40 weeks):

• Pool surface area: 90-140 m² (970-1,500 sq ft)
• Target temperature: 28°C (82°F)
• Assumes: insulated cover used 20+ hours/day, in-ground construction, sheltered location, 1.3m average depth

All Year Round Operation:

• Pool surface area: 60-100 m² (650-1,075 sq ft)
• Target temperature: 28°C (82°F)
• Same conditions as above

Commercial Applications: Ideal for hotel pools, spa facilities, health clubs, therapy pools, and wellness centers requiring reliable all-season heating with minimal noise.

Estimated Heat-Up Times ⏱

These estimates help you understand heating performance. Actual times vary based on ambient temperature, pool insulation, cover usage, and wind exposure.

Formula Used: Time (hours) = (Pool Volume in m³ × Temperature Rise in °C × 1.16) ÷ Heat Pump kW Rating

Heat-Up Time Table – Standard Conditions (Air 15°C, Perfect Mode 23.5kW)

Pool Volume	5°C Rise	10°C Rise	15°C Rise
40 m³ (35,000 L)	9.9 hours	19.7 hours	29.6 hours
50 m³ (44,000 L)	12.3 hours	24.7 hours	37.0 hours
60 m³ (53,000 L)	14.8 hours	29.6 hours	44.4 hours
70 m³ (62,000 L)	17.3 hours	34.5 hours	51.8 hours
80 m³ (70,000 L)	19.7 hours	39.5 hours	59.2 hours

Heat-Up Time Table – Optimal Conditions (Air 27°C, Turbo Mode 40.5kW)

Pool Volume	5°C Rise	10°C Rise	15°C Rise
40 m³ (35,000 L)	5.7 hours	11.4 hours	17.2 hours
50 m³ (44,000 L)	7.2 hours	14.3 hours	21.5 hours
60 m³ (53,000 L)	8.6 hours	17.2 hours	25.8 hours
70 m³ (62,000 L)	10.0 hours	20.1 hours	30.1 hours
80 m³ (70,000 L)	11.4 hours	22.9 hours	34.4 hours

Heat-Up Time Table – Cold Conditions (Air 5°C, Turbo Mode 27.5kW)

Pool Volume	5°C Rise	10°C Rise	15°C Rise
40 m³ (35,000 L)	8.5 hours	16.9 hours	25.4 hours
50 m³ (44,000 L)	10.5 hours	21.1 hours	31.7 hours
60 m³ (53,000 L)	12.7 hours	25.4 hours	38.0 hours
70 m³ (62,000 L)	14.8 hours	29.6 hours	44.4 hours
80 m³ (70,000 L)	16.9 hours	33.8 hours	50.8 hours

⚠️ Important Disclaimer: These are theoretical estimates based on standard formulas. Actual heat-up times will vary significantly based on ambient temperature, humidity, pool insulation, cover usage, wind exposure, starting water temperature, and heat loss factors. Use these estimates as general guidance only. Continuous operation with a pool cover will significantly improve performance.

Running Cost Comparison 💰

Why Inverter Heat Pumps Save You Money:

Compared to traditional heating methods, the I-PAC PRO 36B’s high COP ratings mean substantial energy savings:

Example: Heating 60m³ pool by 10°C (at 15°C ambient, Perfect Mode)

• Energy Required: 696 kWh total
• Heat Pump Consumption: ~30 kWh (COP ~7.4)
• Cost @ £0.25/kWh: £7.50

Compare to:

• Electric Resistance Heating: 696 kWh × £0.25 = £174
• Gas Boiler (80% efficiency): ~870 kWh gas equivalent = £52 (at 6p/kWh gas)

Annual Savings Potential: £1,000+ compared to electric heating, £300-500 compared to gas heating (typical residential pool, seasonal use)

🔧 Installation Requirements

Electrical Requirements

⚡ Three-Phase Supply: 400V, 50Hz, with neutral and earth ⚡ Isolator: Required within 2 meters, in line of sight, minimum 3mm air gap when off ⚡ Protection: Dedicated Type B RCD (30mA), 16A MCB Type C or aM fuse ⚡ Voltage Tolerance: Must remain 360-440V even during compressor startup ⚡ Cable Entry: Multiple cable glands provided in terminal box

Plumbing Requirements

💧 Water Connections: 50mm or 48.3mm female unions (both included) 💧 Flow Rate: 12-18 m³/hour (check bypass valve setting) 💧 Bypass Valve: Essential for flow control – must be installed 💧 Pipework: Solid pipes required (not flexible hose), must be supported 💧 Flow Direction: Water inlet and outlet clearly marked 💧 Unions: Install isolation valves for easy servicing

Installation Clearances & Positioning

📏 Minimum Clearances for Optimal Performance:

• Air Inlet (Side): 700mm clear space
• Air Outlet (Front): 750mm clear space
• Service Access: 500mm clearance recommended
• Obstructions: Avoid placing near walls, fences, or hedges that restrict airflow

🏗️ Mounting:

• Level concrete base or corrosion-resistant mounting brackets
• Anti-vibration mounts included (use M10 bolts if direct mounting)
• Ensure proper drainage for condensate

📍 Location Requirements:

• Minimum 3.5 meters from pool/spa edge (electrical safety regulation)
• Minimum room area: 110.3 m² if installed indoors
• Well-ventilated area with unrestricted air flow
• Protected from direct harsh weather if possible
• Avoid areas with flammable gases or ignition sources

Water Chemistry Requirements

💧 Maintain proper water balance to protect titanium heat exchanger and extend equipment life:

Parameter	Requirement
pH Level	7.2 – 7.8
Total Alkalinity (as CaCO₃)	80 – 120 ppm
Total Hardness (as CaCO₃)	150 – 250 ppm
Total Dissolved Solids	Maximum 1,000 ppm
Salt Content (max)	35,000 ppm
Free Chlorine (Domestic)	1 – 2 ppm
Free Chlorine (Commercial)	3 – 6 ppm
Copper Content (max)	1 ppm

⚠️ Warranty Note: Failure to maintain proper water chemistry will void warranty. Superchlorination up to 30ppm for 24 hours is acceptable.

❓ Frequently Asked Questions

Q: Can the I-PAC PRO 36B operate in freezing temperatures? A: Yes! This heat pump operates down to –20°C ambient temperature with automatic defrost functionality. However, you must ensure continuous water flow through the heat pump when ambient temperatures drop to 2°C or below to prevent frost damage. For extended periods below freezing with no pool use, follow the winterization procedure in the installation manual.

Q: How long will it take to heat my pool? A: Heat-up time depends on pool volume, desired temperature rise, and ambient conditions. For a 60m³ pool requiring a 10°C rise at 15°C ambient air, expect approximately 30 hours in Perfect Mode. Using Turbo Mode or higher ambient temperatures significantly reduces this time. See the heat-up tables above for detailed estimates.

Q: Is three-phase power absolutely necessary? A: Yes, the I-PAC PRO 36B requires a 400V three-phase electrical supply. This is not available in most residential properties in the UK. If you only have single-phase power available, consider the I-PAC PRO 28A (single-phase) with 32.5kW capacity instead. Three-phase is common in commercial buildings, farms, and some large residential properties.

Q: How quiet is “Silence Mode” really? A: In Silence Mode, the heat pump operates at just 19.9 dB(A) at 10 meters – quieter than a whisper (30 dB) or rustling leaves (20 dB). Even in Turbo Mode, maximum noise is only 30.5 dB(A) at 10 meters. For comparison, a normal conversation is 60 dB. This makes it exceptionally quiet for residential installations.

Q: Can I control the heat pump when I’m away from home? A: Absolutely! The built-in WiFi module connects to the Pooltherm App (available for iOS and Android). Once connected, you can monitor pool temperatures, adjust settings, switch between heating/cooling modes, and receive alerts from anywhere with an internet connection. Perfect for vacation properties or facility managers overseeing multiple locations.

Q: What does “COP of 14.7” actually mean for my energy bills? A: COP (Coefficient of Performance) is the ratio of heat output to electrical input. A COP of 14.7 means that for every 1kW of electricity you pay for, the heat pump delivers 14.7kW of heating to your pool. This makes heat pumps 7-10 times more efficient than electric resistance heating and 2-3 times more efficient than gas boilers, resulting in dramatically lower operating costs.

Q: Will this work with saltwater pools? A: Yes! The titanium heat exchanger is specifically designed for salt water applications up to 35,000 ppm salt content. Titanium offers superior corrosion resistance compared to copper or stainless steel heat exchangers, making it the ideal choice for salt chlorinator pools.

Q: What maintenance does the heat pump require? A: Monthly visual inspections (check for debris on evaporator fins, ensure proper drainage). Keep the evaporator coils clean using a soft brush. Check water chemistry weekly. Annual professional inspection of refrigeration circuit and electrical system recommended. Follow winterization procedure if not using during winter months. Full maintenance schedule is provided in the installation manual.

Q: Can this heat pump cool my pool in summer? A: Yes! The I-PAC PRO 36B offers cooling capacity of 20kW at 35°C ambient. This is perfect for keeping pool temperatures comfortable during hot summer months. Auto Mode automatically switches between heating and cooling to maintain your desired temperature year-round.

Q: What’s included in the 5-year warranty? A: The I-PAC PRO 36B comes with a comprehensive 5-year on-site parts and labour warranty when installed and maintained according to manufacturer specifications. This covers manufacturing defects and component failures under normal use. Warranty requires proper installation by qualified personnel, adherence to water chemistry standards, and completion of winterization procedures when applicable.

Q: Can I install this myself? A: Installation must be performed by qualified, competent personnel with appropriate refrigeration and electrical certifications (F-Gas registered). Three-phase electrical work requires a qualified electrician. Improper installation voids the warranty and can be dangerous. The installation manual provides complete guidance for professional installers.

Q: How does this compare to gas pool heating? A: Heat pumps are significantly more energy-efficient than gas heaters. While gas heaters heat quickly, they cost much more to operate (typically 3-5x higher running costs). Heat pumps extract free energy from the air, making them ideal for maintaining pool temperature over long periods. Gas heaters are better suited for rapid heat-up of infrequently used pools, while heat pumps excel at continuous, economical operation.

Q: What happens during a power cut? A: The heat pump features power-down memory, so it will automatically restart when power is restored, resuming the previous operating mode and settings. No manual intervention required. However, during electrical storms, it’s recommended to isolate the heat pump from mains power to protect electronic components.

🛡️ Warranty & Support

5-Year Comprehensive Warranty

Every I-PAC PRO 36B is backed by Dantherm Group’s 5-year on-site parts and labour warranty, providing complete peace of mind. This industry-leading warranty covers:

✅ Manufacturing defects ✅ Component failures under normal use ✅ On-site repair visits by qualified technicians ✅ Replacement parts at no cost ✅ Labour charges included

Warranty Conditions:

• Installation must be completed by qualified personnel following manufacturer guidelines
• Water chemistry must be maintained within specified parameters
• Annual professional maintenance inspection required
• Winterization procedure must be followed when applicable
• Electrical supply must remain within voltage tolerance
• Not covered: frost damage, improper water chemistry, unauthorized modifications

📦 What’s Included

Your I-PAC PRO 36B comes complete with everything needed for professional installation:

✅ I-PAC PRO 36B Heat Pump Unit (3-phase, side outlet, 40.5kW) ✅ Four Anti-Vibration Rubber Mounts (reduces noise transmission) ✅ Winter Cover (vented design for seasonal protection) ✅ Water Union Connectors (two 50mm female + two 48.3mm female) ✅ Condensate Drainage Kit (adaptor + flexible hose) ✅ Owner Installation Manual (comprehensive 50-page guide) ✅ 5-Year On-Site Parts & Labour Warranty

Optional Accessories Available: 🎛️ Remote Control Panel with 10-meter cable (Dantherm Part No. 1009534) 🛡️ Air Sealing Strip for indoor installations (Dantherm Part No. 1009535)

🌍 Environmental Responsibility

The I-PAC PRO 36B represents the latest generation in eco-friendly pool heating:

🌱 R32 Refrigerant – Global Warming Potential (GWP) of 675, significantly lower than legacy refrigerants like R410A (GWP 2,088). Compliant with EU F-Gas regulations.

⚡ Energy Efficiency – COP ratings up to 20 mean less electricity consumption and lower carbon footprint compared to traditional heating.

♻️ Long Service Life – Titanium construction and robust components ensure extended lifespan, reducing waste and replacement needs.

🔄 End-of-Life Recycling – Designed for responsible recycling in accordance with national regulations and environmental protection standards.

🏭 Quality Management – Manufactured by Dantherm Group under ISO 9001 quality management and ISO 14001 environmental management systems.

✅ Why Buy from Parts4Tubs?

🚚 Fast, Reliable Delivery across the UK

💬 Expert Technical Support – our team knows pool heating inside out

🔧 Professional Installation Available (contact us for quotes)

💳 Secure Payment Options with buyer protection

📞 Dedicated Customer Service – we’re here to help

⭐ Trusted Supplier of premium pool equipment since [year]

🛒 Ready to Upgrade Your Pool Heating?

The I-PAC PRO 36B delivers commercial-grade performance with residential-friendly operation. Whether you’re heating a large home pool, managing a hotel facility, or operating a spa center, this heat pump provides the power, efficiency, and reliability you need – year-round, in any weather.

Questions about installation, sizing, or compatibility? Contact our technical team today:

Professional Installation Services Available – We can connect you with qualified installers in your area for complete peace of mind.

🔍 Technical Specifications Summary

Category	Key Specs
Heating Capacity	40.5kW (Turbo) / 32.5kW (Perfect) @ 27°C air
Cooling Capacity	20kW @ 35°C air
Power Supply	400V, 3-Phase, 50Hz
Operating Range	–20°C to +43°C ambient
COP Rating	7.3 – 20 (average 14.7 @ 50% speed)
Refrigerant	R32 (3.6kg charge, GWP 675)
Sound Level	19.9 – 30.5 dB(A) @ 10m
Water Flow	12-18 m³/h
Dimensions	1364 × 536 × 954 mm
Weight	147 kg
Warranty	5 years on-site parts & labour

Heat pump data and performance parameters are subject to modification without prior notice. Always refer to the nameplate. Specifications accurate as of publication date.