🌡️ Gecko in.temp Heat Pump (5kW) – Ultra-Efficient Spa Heating System

Transform your spa heating with the revolutionary Gecko in.temp 5kW Air Source Heat Pump. Engineered for maximum efficiency and unmatched convenience, this plug-and-play solution delivers up to 75% energy savings compared to traditional electric heating elements. With an impressive COP of 6.21, the in.temp harnesses free renewable energy from the air to keep your spa at the perfect temperature year-round.

Whether you’re looking to reduce running costs, minimize your carbon footprint, or enjoy consistent spa temperatures in any weather, the Gecko in.temp represents the pinnacle of modern spa heating technology.

Why Choose the Gecko in.temp 5kW Heat Pump?

⚡ Exceptional Energy Efficiency

The in.temp achieves efficiency rates 4 to 5 times higher than traditional electric heaters. By capturing renewable thermal energy from ambient air, this heat pump can deliver up to 5.54 kW of heating output while consuming just 0.89 kW of electricity in optimal conditions (COP 6.21). This translates to substantial savings on your energy bills – potentially reducing heating costs by up to 75%.

🌍 Environmentally Responsible Heating

Committed to sustainability, the in.temp uses R32 refrigerant – an ozone-friendly, low-GWP (Global Warming Potential) gas that dramatically reduces carbon emissions compared to conventional heating systems. By choosing this heat pump, you’re investing in both superior performance and environmental stewardship.

🔌 Plug & Play Simplicity

Forget complicated installations requiring additional electrical circuits. The in.temp features automatic detection and smart power management, drawing power directly from compatible Gecko spa control systems. Simply connect the communication cable and power cable to your IN.YE or IN.YT control, and you’re ready to go.

🌡️ Six Intelligent Operating Modes

Customize your spa experience with versatile operation modes designed for any climate or preference:

• Eco Heat – Heat pump only, maximum energy savings
• Smart Heat – Primarily heat pump with backup element for rapid heating
• Eco Auto – Automatic heating/cooling selection, no electric element
• Smart Auto – Automatic heating/cooling with intelligent backup heating
• Cool – Active cooling mode for hot summer days
• Electric – Traditional electric element heating only

🌡️ All-Weather Performance

Engineered for year-round operation, the in.temp functions effectively in ambient temperatures ranging from -5°C to 43°C (23°F to 109°F). This wide operating range ensures consistent spa heating in spring, summer, fall, and even winter conditions.

Key Features & Benefits

Premium Construction

✅ Titanium Heat Exchanger – Corrosion-resistant, compatible with all water treatments including chlorine, bromine, iodine, and salt water
✅ Rotary GMCC Compressor – Reliable, efficient compression technology for optimal performance
✅ IPX4 Water Resistance – Weather-protected enclosure for outdoor installation
✅ Quiet Operation – 51.5 dB(A) at 1 meter – quieter than normal conversation

Smart Integration & Safety

✅ Automatic System Detection – Seamless integration with Gecko IN.YE and IN.YT controls (requires RS-485 and core 61 rev. 54+)
✅ Built-in Protection Systems – Water flow, high/low pressure, overload, and compressor protection
✅ Self-Diagnosis System – Display error codes on spa keypad for quick troubleshooting
✅ Auto Defrost – Maintains performance in cold weather conditions
✅ Freeze Protection – Automatic backup heating when temperatures approach freezing

Installation Advantages

✅ No Additional Power Circuit Required – Powers from spa control system
✅ Includes 5m (16ft) Communication & Power Cables – Ready for immediate installation
✅ Compact Footprint – 794mm L × 346mm W × 555mm H fits most installations
✅ Stable Four-Foot Mounting Base – Secure positioning with included rubber mounts

Complete Technical Specifications

Electrical Specifications (CE Model 230V)

Specification	Value
Input Supply	220V ~ 240V, 50 Hz
Maximum Power Input	1.29 kW
Rated Current	3.9 A
Maximum Current	6.07 A
Communication Supply	10-12 Vdc, 80mA

Performance Data

Optimal Conditions (24°C ambient, 26°C water inlet)

Performance Metric	Value
Heating Capacity	5.54 kW
Power Consumption	0.89 kW
COP (Coefficient of Performance)	6.21
Efficiency	Over 500% efficient vs. electric

Cooler Conditions (15°C ambient, 26°C water inlet)

Performance Metric	Value
Heating Capacity	3.99 kW
Power Consumption	0.87 kW
COP (Coefficient of Performance)	4.59
Efficiency	Over 400% efficient vs. electric

Cooling Performance (35°C ambient, 29°C water inlet)

Performance Metric	Value
Cooling Capacity	3.87 kW
Power Consumption	1.2 kW
EER (Energy Efficiency Ratio)	3.21

Mechanical Specifications

Component	Specification
Compressor Type	Rotary (GMCC)
Refrigerant	R32 / 650g (22.9 oz)
Heat Exchanger	Titanium (corrosion-resistant)
Pressure Range	Min: 1.5 MPa (218 psi) / Max: 4.15 MPa (609 psi)
Water Connections	1.5″ (38mm) female sockets
Optimal Flow Rate	2.27 m³/h (10 GPM)
Minimum Flow Rate	1.14 m³/h (5 GPM)
Flow Detection	Flow switch protection
Noise Level	51.5 dB(A) at 1 meter

Physical Dimensions & Weight

Dimension	Measurement
Length (B)	794 mm (31.26″)
Width (D)	346 mm (13.62″)
Height (A)	555 mm (21.85″)
Net Weight	39 kg (86 lbs)
Shipping Weight	45 kg (99 lbs)
Operating Temperature Range	-5°C to 43°C (23°F to 109°F)

Spa Sizing & Heat-Up Performance Guide

Recommended Spa Volumes

The Gecko in.temp 5kW is ideally suited for:

• Small to Medium Spas: 1,000 – 2,000 litres (265 – 530 gallons)
• Standard Hot Tubs: Up to 2,500 litres (660 gallons)

Estimated Heat-Up Times

The following estimates are calculated using standard thermodynamic formulas. Actual performance varies based on ambient temperature, spa insulation, cover quality, wind exposure, and water treatment chemistry.

Formula Used:

Time (hours) = (Water Volume m³ × Temperature Rise °C × 1.16) ÷ Heat Pump kW Rating

Heat-Up Estimates at 24°C Ambient Temperature (5.54 kW output)

Spa Volume	5°C Rise (32°F→37°C)	10°C Rise (27°F→37°C)	15°C Rise (22°F→37°C)
1,000 L (265 gal)	1.0 hours	2.1 hours	3.1 hours
1,500 L (396 gal)	1.6 hours	3.1 hours	4.7 hours
2,000 L (528 gal)	2.1 hours	4.2 hours	6.3 hours
2,500 L (660 gal)	2.6 hours	5.2 hours	7.8 hours

Heat-Up Estimates at 15°C Ambient Temperature (3.99 kW output)

Spa Volume	5°C Rise (32°F→37°C)	10°C Rise (27°F→37°C)	15°C Rise (22°F→37°C)
1,000 L (265 gal)	1.5 hours	2.9 hours	4.4 hours
1,500 L (396 gal)	2.2 hours	4.4 hours	6.5 hours
2,000 L (528 gal)	2.9 hours	5.8 hours	8.7 hours
2,500 L (660 gal)	3.6 hours	7.3 hours	10.9 hours

⚠️ Important Performance Notes:

• Heat-up times increase as ambient temperature decreases
• Well-insulated spas with quality covers maintain temperature better
• Smart Heat mode may engage electric element for faster initial heating
• Regular filtration and proper water chemistry optimize heat transfer

Running Cost Comparison

Annual Energy Savings Analysis

Based on maintaining spa at 38°C (100°F) with average UK energy costs

Traditional 3kW Electric Element Heater

• Daily consumption: ~72 kWh (24 hours × 3 kW)
• Monthly cost: £648 (at £0.30/kWh)
• Annual cost: £7,776

Gecko in.temp 5kW Heat Pump (Eco Heat Mode)

• Daily consumption: ~15 kWh (effective heating with COP 5.0)
• Monthly cost: £135 (at £0.30/kWh)
• Annual cost: £1,620

💰 Potential Annual Savings: £6,156 (79% reduction)

Actual savings depend on usage patterns, ambient temperatures, spa insulation, and local energy rates. Estimates are provided for comparative purposes.

Installation Requirements & Guidelines

Electrical Connection

• Compatible with Gecko IN.YE and IN.YT control systems (with RS-485 port)
• Requires software core 61 revision 54 or higher
• Connects via included 5m power and communication cables
• Power terminals: 6.35mm (0.250″) quick connect female terminals
• No additional circuit breaker required (powers from spa control)

Plumbing Configuration

Required Bypass System (3-valve setup):

1. Input Valve – Controls water flow to heat pump
2. Bypass Valve – Adjusts flow rate through heat exchanger
3. Output Valve – Isolates unit for maintenance

Installation Best Practices:

• Install on pressure side of circulation pump for stable flow
• Position bypass before water treatment systems (chlorine/bromine/salt)
• Install check valve between bypass and treatment system
• Use 1.5″ (38mm) plumbing connections
• Insulate external pipes with foam insulation
• Keep pipes inside spa cabinet in freezing climates

Positioning & Clearances

Essential Clearances:

• 3 meters (9 feet) free space in front of air discharge panel
• 1 meter (3 feet) free space at air inlet panel
• 0.5 meters (20 inches) clearance on sides for service access
• Install on solid, flat surface with slight rearward slope (for condensation drainage)
• Maximum 5 meters (16 feet) from spa for included cables

Location Considerations: ✅ Good ventilation – avoid enclosed spaces like basements
✅ Stable mounting surface – use included rubber vibration mounts
✅ Away from bedroom windows – minimize noise impact
✅ Protected from dominant winds and snow accumulation
✅ In cold climates: elevate 46cm (18″) above ground on metal frame

Avoid These Locations: ❌ Airtight or confined spaces
❌ Areas with polluted air, dust, or debris
❌ Directly against walls or windows
❌ Near noise-sensitive areas
❌ Exposed to electromagnetic interference from other appliances

Water Treatment Compatibility

The titanium heat exchanger is compatible with:

• Chlorine systems
• Bromine systems
• Salt water (chlorine generator) systems
• Iodine-based treatments
• Mineral systems

Operating Modes Explained

1️⃣ Eco Heat (EcoH) – Maximum Savings

How it works: Heat pump operates exclusively, electric element remains off
Best for: Mild weather, gradual heating, maximum energy efficiency
Energy use: Lowest possible consumption
Temperature control: Heating only (no active cooling)

2️⃣ Smart Heat (HEAT) – Balanced Performance

How it works: Heat pump provides primary heating; electric element activates only for rapid temperature recovery
Best for: Variable weather, faster heat-up when needed
Energy use: Low to moderate (element backup when beneficial)
Temperature control: Heating only (no active cooling)

3️⃣ Eco Auto (AUTO) – Hands-Off Efficiency

How it works: Automatically switches between Eco Heat and Cool modes based on water temperature
Best for: Year-round use, variable seasonal temperatures
Energy use: Low (heat pump only, no electric element)
Temperature control: Both heating and cooling

4️⃣ Smart Auto (SMRT) – Total Automation

How it works: Automatically switches between Smart Heat and Cool modes with intelligent backup heating
Best for: Complete set-it-and-forget-it operation
Energy use: Moderate (optimizes heat pump and element usage)
Temperature control: Both heating and cooling with backup

5️⃣ Cool (COOL) – Summer Mode

How it works: Heat pump operates in cooling-only mode
Best for: Hot summer weather, preventing overheating
Energy use: Moderate (heat pump cooling operation)
Temperature control: Cooling only

6️⃣ Electric (ELEC) – Traditional Heating

How it works: Heat pump disabled, electric element only
Best for: Extreme cold weather when heat pump efficiency drops
Energy use: Highest consumption
Temperature control: Heating only (electric element)

Safety Features & Protection Systems

Built-in Safety Protections

🛡️ Water Flow Protection – Prevents operation without adequate circulation
🛡️ High/Low Pressure Protection – Safeguards refrigeration system
🛡️ Overload Protection – Prevents electrical system damage
🛡️ Compressor Protection – Thermal and mechanical safeguards
🛡️ Freeze Protection Algorithm – Automatic backup heating when approaching 0°C
🛡️ 3-Minute Restart Delay – Protects compressor from rapid cycling

Self-Diagnosis System

When issues occur, the in.temp displays error codes on your spa keypad for quick identification and resolution. Common error codes include:

Error Code	Description
HP99	Communication error between heat pump and spa control
HP41	Water flow protection activated (check circulation)
HP42	Compressor high pressure protection
HP46	Compressor low pressure protection
HP05	Coil temperature sensor failure
HP18	Water outlet temperature sensor failure
HP65	Ambient temperature too low protection

Full error code reference available in technical documentation

Winterization & Seasonal Maintenance

Winter Shutdown Procedure (Cold Climates)

If shutting down the heat pump for winter while keeping spa operational:

1. Disconnect power at spa control breaker
2. Mark valve positions for easy spring startup
3. Close input and output valves completely
4. Disconnect plumbing at heat pump connections
5. Remove drain plug and ensure complete drainage
6. Blow out lines with compressed air (recommended)
7. Loosely reconnect fittings to prevent debris entry
8. Cover unit with protective tarp
9. Re-energize spa control (heat pump will not be detected)

⚠️ Critical: All valves must be installed inside spa cabinet in freezing climates to prevent pipe damage.

Spring Startup Procedure

1. Disconnect power at spa breaker
2. Inspect all plumbing for winter damage
3. Tighten all connections and reinstall drain plug securely
4. Return valves to marked operating positions
5. Reconnect power cable to spa control (refer to manual)
6. Verify RS-485 communication cable is connected
7. Re-energize spa control – unit should be detected automatically

Routine Maintenance Schedule

Monthly:

• Clean air inlet and outlet grills from leaves/debris
• Check for unusual noise or vibration
• Verify proper water flow and temperature control

Seasonally:

• Inspect finned heat exchanger for blockages
• Flush heat exchanger with clean water if needed
• Check all plumbing connections for leaks
• Verify condensation drainage is functioning

Annually:

• Professional inspection of refrigerant system
• Deep clean evaporator and condenser coils
• Test all safety systems and sensors
• Verify optimal bypass valve settings

Compatibility & System Requirements

Compatible Spa Control Systems

✅ Gecko IN.YE (all versions with RS-485 communication port)
✅ Gecko IN.YT (all versions with RS-485 communication port)
✅ Gecko IN.YJ (with RS-485 support)

Required Software: Core 61, Revision 54 or higher

Compatible Keypads (Auto-Detected)

The in.temp works seamlessly with Gecko’s complete keypad range:

• in.k1001+ – Color LCD capacitive touchscreen
• in.k1000+ – Color LCD capacitive touchscreen
• in.k800 – Color LCD, 10-key interface
• in.k500 – Color LCD, 7-key interface
• in.k330 – Color LCD, 5-key interface

Included Accessories (Standard 5m/16ft)

📦 Communication cable (9920-401527)
📦 Power cable CE model (9920-401529)
📦 Quick Reference installation guide
📦 Four rubber vibration mounts
📦 Complete hardware kit

Optional Accessories (Available Separately)

• Extended 10m (33ft) Communication Cable (9920-401528)
• Extended 10m (33ft) Power Cable CE (9920-401530)

Frequently Asked Questions

How much can I really save with a heat pump vs. electric heating?

The in.temp can reduce your spa heating costs by up to 75% compared to traditional electric element heating. With a COP of 6.21 in optimal conditions, the unit delivers over 6 kW of heat for every 1 kW of electricity consumed. Actual savings depend on your ambient temperature, usage patterns, and local energy rates. In mild weather (15-24°C), expect COPs between 4.5 and 6.2, translating to 350-520% efficiency compared to standard electric heaters.

Will the heat pump work in winter temperatures?

Yes! The in.temp operates effectively in ambient temperatures from -5°C to 43°C (23°F to 109°F). However, efficiency decreases as temperatures drop. At 15°C (59°F), the COP is 4.59 – still over 4 times more efficient than electric. In temperatures approaching -5°C, the system’s smart algorithms may engage the backup electric element to maintain efficiency. For extreme winter climates, consider winterizing the unit and using electric-only mode during the coldest months.

How loud is the heat pump during operation?

The in.temp operates at just 51.5 dB(A) at 1 meter distance – quieter than normal conversation (60 dB) and significantly quieter than most household appliances. The unit features sound-dampening design and quality components for minimal noise impact. Proper installation away from bedroom windows and use of the included rubber vibration mounts further reduces noise transmission.

Can I install this myself, or do I need a professional?

While the in.temp features plug-and-play electrical connection to compatible Gecko controls, we strongly recommend professional installation for plumbing and system integration. A qualified technician ensures proper bypass valve configuration, optimal water flow rates, correct clearances, and safe electrical connections. Improper installation can reduce efficiency, cause system damage, or void warranty coverage.

What size spa is the 5kW model suitable for?

The 5kW in.temp is ideal for spas ranging from 1,000 to 2,500 litres (265-660 gallons). For larger spas or swim spas above 2,500 litres, consider the 7.5kW model for faster heat-up and better temperature maintenance. Spa volume, insulation quality, cover type, and climate all influence sizing requirements.

Does the heat pump also cool the water in summer?

Yes! The in.temp features active cooling capability, making it one of the few spa heat pumps offering both heating and cooling functions. In Cool mode or Auto modes, the unit can actively lower water temperature on hot summer days, ensuring year-round comfort. Cooling capacity is 3.87 kW at 35°C ambient temperature.

How long does it take to heat up my spa?

Heat-up time depends on water volume, starting temperature, ambient air temperature, and operating mode. For a typical 1,500-litre spa at 24°C ambient temperature, expect approximately 3 hours to raise temperature by 10°C (e.g., 27°C to 37°C). In cooler 15°C weather, the same heat-up requires about 4.4 hours. Smart Heat mode can reduce these times by engaging the electric element for faster initial heating.

What maintenance does the heat pump require?

The in.temp requires minimal maintenance: monthly cleaning of air grills, seasonal inspection of the heat exchanger, and annual professional servicing of the refrigeration system. The titanium heat exchanger is highly corrosion-resistant and compatible with all standard spa chemicals. Ensure proper water chemistry and filtration to prevent scaling in the heat exchanger. In cold climates, proper winterization is essential to prevent freeze damage.

Is the titanium heat exchanger better than standard exchangers?

Absolutely. Titanium offers superior corrosion resistance compared to copper or stainless steel, especially important in spa environments with aggressive water chemistry (chlorine, bromine, salt). Titanium maintains excellent heat transfer efficiency while providing exceptional longevity – typically lasting the entire life of the heat pump without degradation. This makes the in.temp compatible with all water treatment systems without special precautions.

Can I use this with saltwater/chlorine generator systems?

Yes, the titanium heat exchanger is fully compatible with salt water chlorine generator systems, as well as traditional chlorine, bromine, iodine, and mineral treatment systems. The non-corrosive properties of titanium make it ideal for saltwater applications where standard copper or brass exchangers would fail prematurely.

What happens if there’s a power outage in winter?

The in.temp includes freeze protection algorithms that automatically engage backup heating when water temperature approaches freezing point. However, during extended power outages in freezing weather, the pump cannot run to circulate water and prevent freezing in exposed pipes. If you experience frequent winter outages, install all plumbing and valves inside the heated spa cabinet, or consider winterizing the heat pump during the coldest months.

How does the smart power management work?

The in.temp draws power directly from your compatible Gecko spa control system – no separate circuit breaker or dedicated electrical line required. The control automatically detects the heat pump via RS-485 communication, manages power allocation to prevent overload, and intelligently coordinates between heat pump and other spa functions (jets, lights, etc.). This seamless integration simplifies installation and ensures optimal system performance.

📄 Downloads & Technical Documentation

Complete product documentation is available for download below. All PDFs open in a new tab for your convenience.

Installation & Setup

📄 Quick Reference Installation Guide (opens in new tab)
Essential installation guide covering system connections, wiring diagrams, bypass plumbing configuration, operating modes, error codes, and troubleshooting. Perfect for installers and technicians. 4 pages.

Product Information

📄 Gecko in.temp 5kW Product Flyer (opens in new tab)
Comprehensive specifications sheet including electrical ratings, performance data, dimensions, refrigerant specifications, noise levels, and compatibility information. 2 pages.

Complete Technical Manual

📄 Gecko in.temp 5kW TechBook (opens in new tab)
Full technical manual with safety instructions, detailed installation procedures, piping requirements, operating mode explanations, winterization steps, complete maintenance schedule, troubleshooting guides, and warranty information. 16 pages.

🛒 Ready to Upgrade Your Spa Heating?

Order your Gecko in.temp 5kW Heat Pump today and start saving up to 75% on your spa heating costs!

✅ Plug & play installation with compatible Gecko controls
✅ 6 intelligent operating modes for any weather condition
✅ Titanium heat exchanger for lifetime corrosion resistance
✅ COP 6.21 efficiency – over 5× more efficient than electric
✅ Heating & cooling capability for year-round comfort
✅ Whisper-quiet operation at just 51.5 dB(A)

For large commercial projects or multi-unit installations, contact our sales team for bespoke quotations and volume pricing.

Transform your spa experience while protecting the environment and your wallet. The future of efficient spa heating is here.