♨️ Elecro H.R.UV-C Spa Classic 30W UV Sterilisation System with Amalgam Lamp (HR-30-UK-SPA)

Spa-optimised UV-C sterilisation with temperature-stable amalgam lamp technology for hot tubs and spas up to 30,000 litres

💧 Product Overview

The Elecro H.R.UV-C Spa Classic is specifically engineered for hot tub and spa applications, featuring advanced amalgam lamp technology that delivers consistent UV-C output across the wide temperature range encountered in heated spa environments. Unlike standard UV lamps that lose efficiency at elevated temperatures, the amalgam lamp maintains optimal performance from 0°C to 40°C, making it the perfect choice for hot tubs, spas, and hydrotherapy installations up to 30,000 litres (30m³).

Featuring Elecro’s revolutionary E-PTFE super reflective reaction chamber — the highest UV reflective index on the market — this compact system dramatically amplifies microorganism exposure to sterilising UV-C radiation. The E-PTFE chamber maintains up to 95% UV reflection, ensuring maximum pathogen destruction with exceptional efficiency.

The spa-specific amalgam lamp offers an impressive 14,000-hour lamp life — significantly longer than standard pool UV lamps — providing extended service intervals and reduced maintenance costs. Engineered and manufactured in Stevenage, England, the HR-30-UK-SPA includes an analogue lamp life indicator with reset switch and integrated flow switch for professional monitoring in demanding spa environments.

⭐ Key Features

✅ Amalgam Lamp Technology – Temperature-stable UV output from 0°C to 40°C, ideal for heated spas

✅ 14,000 Hours Lamp Life – Extended service life compared to standard pool UV lamps

✅ 30W Energy-Efficient Lamp – Powerful sterilisation with minimal energy consumption

✅ E-PTFE Super Reflective Chamber – Highest UV reflective index on the market (up to 95% reflection)

✅ Spas up to 30m³ (30,000 Litres) – Perfect for hot tubs, swim spas, and hydrotherapy installations

✅ Consistent Performance at Elevated Temperatures – Maintains optimal output in heated spa water

✅ Compact Design – Space-efficient for spa plant rooms and equipment enclosures

✅ Flow Capacity up to 12m³/h – Handles up to 12,000 litres per hour

✅ Analogue Lamp Life Indicator – Visual LED monitoring with Green/Amber/Red status

✅ Flow Switch Protection – Integrated flow monitoring ensures safe operation

✅ Reset Switch – Easy lamp life timer reset after maintenance

✅ Salt and Sea Water Compatible – 100% compatible with chlorinated salt and sea water systems

✅ Flexible Mounting Options – Install vertically or horizontally

✅ IP64 Ingress Protection – Protected against water splashes from all directions

✅ 2-Year European Warranty – Manufactured in England to the highest standards

🔧 Technical Specifications

Specification	Value
Model	H.R.UV-C Spa Classic
Product Code	HR-30-UK-SPA
Technology	UV-C Sterilisation with E-PTFE Reflective Chamber
Reflection Rate	Up to 95% UV reflection
Maximum Spa Size	30,000 litres / 30m³
Lamp Output	30W
Maximum Power Consumption	40W
Power Supply	Single Phase 100V ~ 240V
Frequency	50/60 Hz
Minimum Flow Rate	1.5m³/h (1,500 litres per hour)
Maximum Flow Rate	12,000 litres per hour / 12m³/h
Lamp Type	Amalgam (temperature-stable)
Operating Temperature Range	0°C – 40°C
Lamp Life	14,000 hours (approximately 2+ years)
Dosing Rate	Exceeds 30mJ/cm² at maximum flow rate
Maximum Working Pressure	3 Bar
Ingress Protection Rating	IP64
Water Connections	2″/63mm stepped ABS unions + reducers 1½”/50mm
Salt Water Compatible	Yes – 100% chlorinated salt and sea water safe
Mounting	Vertical or horizontal wall mounting
Dimensions (L x W x H)	623mm x 349mm x 108mm
Net Weight	4.83 kg
Gross Weight	6.70 kg
Features	Flow switch, analogue lamp life indicator & reset switch
Oxidisation Process	UV
Warranty	2 years (Europe) / 1 year (outside Europe)

🔬 How It Works

The H.R.UV-C Spa Classic employs advanced UV-C technology with a temperature-stable amalgam lamp and revolutionary super reflective chamber:

Water enters H.R.UV-C → Passes through E-PTFE reflective chamber → UV-C light destroys microorganisms →

1️⃣ E-PTFE SUPER REFLECTIVE CHAMBER

The unique E-PTFE (Expanded Polytetrafluoroethylene) reaction chamber provides the highest UV reflective index on the market. This extremely repellent material maintains up to 95% UV reflection, dramatically amplifying the exposure of microorganisms to sterilising UV-C radiation.

2️⃣ AMALGAM LAMP TECHNOLOGY

Unlike standard low-pressure UV lamps that lose efficiency at elevated temperatures, the amalgam lamp maintains consistent UV-C output across a wide temperature range (0°C to 40°C). This makes it ideal for hot tubs and spas where water temperatures typically range from 35°C to 40°C.

Standard lamps can drop to 60-70% efficiency at spa temperatures, while amalgam lamps maintain near 100% output — ensuring consistent sterilisation performance regardless of your spa’s operating temperature.

3️⃣ UV-C STERILISATION

The 30W amalgam lamp emits germicidal ultraviolet light at 254 nanometres. This wavelength penetrates microorganism cell walls and disrupts their DNA/RNA, preventing reproduction and effectively neutralising:

• Bacteria
• Viruses
• Algae
• Fungi
• Parasites (including Cryptosporidium and Giardia)

4️⃣ AMPLIFIED PATHOGEN DESTRUCTION

The combination of the temperature-stable amalgam lamp and the super reflective E-PTFE chamber means microorganisms receive multiple exposures to consistent UV-C radiation. This dramatically increases sterilisation efficiency in demanding spa environments.

→ Only sterilised water returns to your spa

🌡️ Why Amalgam Lamp Technology for Spas?

Standard UV lamps are optimised for pool temperatures (typically 24-28°C) and lose significant efficiency when exposed to the elevated temperatures found in hot tubs and spas (35-40°C).

Amalgam vs Standard Lamp Performance:

Temperature	Standard Lamp Output	Amalgam Lamp Output
20°C	~95%	~100%
28°C	~85%	~100%
35°C	~70%	~100%
40°C	~60%	~98%

The amalgam lamp’s consistent performance across the full temperature range ensures your spa receives optimal sterilisation at all times — not just when the water is cool.

Additional Amalgam Lamp Benefits:

✅ Extended Lamp Life – 14,000 hours vs 9,000 hours for standard lamps

✅ Consistent Output – Near 100% UV output from 0°C to 40°C

✅ Higher Bather Load Handling – Maintains performance during intensive spa use

✅ Reduced Maintenance – Longer service intervals save time and money

🔆 Lamp Life Indicator System

The H.R.UV-C Spa Classic features an analogue lamp life indicator with colour-coded LED status:

LED Colour	Hours Remaining	Action Required
🟢 Green	9,000 – 500 hours	Normal operation
🟡 Amber	499 – 1 hours	Order replacement lamp
🔴 Red	0 hours	Replace lamp immediately

💡 Note: The lamp life indicator countdown is set to 9,000 hours as standard. The amalgam lamp has an actual lifespan of 14,000 hours, providing additional service life beyond the indicator reset point.

How the Indicator Works:

At initial power on, the LED indicator lights red for one second to confirm the 9,000-hour setting, then immediately changes to green to indicate the timer has started.

When the timer reaches less than 500 hours, the LED changes from green to amber — this is your signal to order a replacement lamp.

When the timer reaches zero, the LED changes to red, signalling that the UV lamp should be changed.

Resetting the Timer:

After changing the UV lamp, press and hold the reset button until the LED indicator goes off and then comes back on. When released, the LED will show red for one second followed by green, confirming the timer has restarted.

⚡ Electrical Requirements

Specification	Value
Supply Voltage	Single Phase 100V ~ 240V
Frequency	50/60 Hz
Maximum Power Consumption	40W
Plug Type	UK 3-pin (BS 1363)

⚠️ IMPORTANT ELECTRICAL SAFETY INFORMATION:

All electrical work must be carried out by a qualified electrician in accordance with UK wiring regulations (BS 7671).

• This unit must be earthed
• Power must be supplied through a Residual Current Device (RCD) with a rated residual operating current not exceeding 30mA
• An Electrical Installation Certificate must be provided on completion of installation
• The manufacturer will not be liable for any issues caused by poor or improper installation
• Any alterations made to the unit will affect the warranty

🔄 Compatibility

Water Connections:

Connection	Size
Main Unions	2″ / 63mm stepped ABS
Reducers Included	1½” / 50mm

Flow Requirements:

Parameter	Value
Minimum Flow Rate	1.5m³/h (1,500 litres per hour)
Maximum Flow Rate	12m³/h (12,000 litres per hour)
Maximum Working Pressure	3 Bar

💡 Note: A higher flow rate will require the installation of a bypass to prevent damage to the unit.

Water Type:

• Fresh water spas ✅
• Salt chlorinated spas ✅
• Sea water spas ✅

Water Quality Requirements:

Parameter	Required Range
pH	6.8 – 8.0
Total Alkalinity (TA)	80 – 140 ppm
Chloride Content	Maximum 150 mg/litre
Free Chlorine	2.0 mg/litre
Total Bromine	Maximum 4.5 mg/litre
TDS/Calcium Hardness	200 – 1,000 ppm

⚠️ Failure to meet water quality limits will void the warranty.

Installation Position:

PUMP → FILTER → HEATER → ⭐ H.R.UV-C SPA ⭐ → CHEMICAL DOSING → SPA
                                                    ↑
                                           Non-Return Valve

The H.R.UV-C Spa must be installed downstream (after) pumps, filters and heating devices, but upstream (before) any chemical dosing or similar water treatment equipment.

🛠️ Installation

Mounting Requirements:

Requirement	Specification
Position	Vertical or horizontal wall mounting
Clearance	Minimum 1 metre from one side for lamp access
Fixing	Wall mounting kit included
Environment	Dry, permanent, weather-proof area

Critical Installation Notes:

⚠️ Install AFTER pump, filter and heater

⚠️ Install BEFORE chemical dosing equipment

⚠️ Do not run this unit dry

⚠️ Do not cover this unit

⚠️ The unit must not be submerged in water

⚠️ Leave minimum 1 metre clearance for lamp/quartz sleeve replacement

⚠️ Must be installed within a dry, permanent weather-proof area

⚠️ If water or moisture enters the enclosure, warranty will be void

⚠️ Do not operate the UV-C emitter when removed from the appliance enclosure

💡 Tip: Flow direction is factory set for water entering on the left and exiting on the right. This can be reversed by rotating the flow switch 180 degrees (½ turn) if required.

💡 Winter Storage: If unused during winter months, drain the unit to prevent frost damage. Water must not be allowed to freeze inside the unit.

🔧 Maintenance

Routine Tasks:

Task	Frequency
Check lamp life indicator	Monthly
Inspect connections for leaks	Monthly
Replace UV lamp	When indicator shows red / 14,000 hours
Clean quartz sleeve	During lamp replacement
Replace O-rings	Annually
Inspect lamp connectors	Annually

Analogue Lamp Life Indicator:

LED Status	Meaning	Action
🟢 Green	Active operation	Normal operation
🟡 Amber	<500 hours on timer	Order replacement lamp
🔴 Red	Timer at zero	Replace lamp

Annual Maintenance Includes:

• Changing lamp if necessary
• Inspection and cleaning of quartz sleeve (replace if any cracks are discovered)
• Replacing all O-rings
• Replacing lamp connectors (white plastic insert inside the blue lamp shroud) if corroded, wet, damaged or overheated
• Inspecting plastic body and blue compression fittings for excessive wear

⚠️ Important: Before performing any maintenance, isolate from the main power supply, turn off the circulation pump, and drain the unit.

⚠️ Warning: UV-C radiation may cause harm to eyes and skin even in small doses. Never handle or look directly at an illuminated UV lamp. Do not operate the UV-C emitter when removed from the appliance enclosure.

Quartz Sleeve Cleaning:

Clean the sleeve and polish with a soft cloth or paper towel. In hard water areas, limescale can be removed by soaking the sleeve in a proprietary kettle descaling solution.

💡 Note: Failure to remove limescale will limit the effectiveness of the UV lamp.

Replacement Parts Reference Codes:

• Amalgam UV Lamp: SP-UV-LAMP-30-AM
• Quartz Sleeve: SP-UV-QS-30
• O-Ring Set: SP-UV-ORS

💎 Benefits

Benefit	Description
🌡️ Temperature-Stable Performance	Amalgam lamp maintains consistent output from 0°C to 40°C
⏱️ Extended Lamp Life	14,000 hours — significantly longer than standard pool UV lamps
✨ Supreme Sterilisation Efficiency	E-PTFE chamber with up to 95% UV reflection
♨️ Spa-Optimised Design	Engineered specifically for hot tub and spa applications
📐 Compact Footprint	Space-efficient for spa equipment enclosures
🦠 Destroys Chlorine-Resistant Pathogens	Neutralises bacteria, viruses, algae and fungi
💧 Crystal Clear Water	Powerful UV-C sterilisation eliminates contaminants
🧪 Reduces Chemical Dependency	Significantly reduces reliance on chemical sanitisers
👃 Eliminates Chlorine Smell	Powerful sterilisation reduces unpleasant odours
🌿 No Harmful By-Products	Chemical-free sterilisation produces no gases or residues
📊 Professional Monitoring	Analogue lamp life indicator for maintenance scheduling
🛡️ Flow Switch Protection	Integrated safety monitoring prevents dry running
⚡ Energy Efficient	Only 40W maximum power consumption
🌊 Salt Water Safe	100% compatible with chlorinated salt and sea water
🇬🇧 UK Manufactured	Engineered and manufactured in Stevenage, England

❓ Frequently Asked Questions

Q: Why do I need a spa-specific UV system?

A: Standard pool UV lamps lose significant efficiency at elevated spa temperatures (35-40°C). The H.R.UV-C Spa uses amalgam lamp technology that maintains consistent UV output across the full temperature range, ensuring optimal sterilisation performance in heated spa water.

Q: What is amalgam lamp technology?

A: Amalgam lamps use a mercury-amalgam mixture that provides stable UV-C output across a wide temperature range (0°C to 40°C). Standard lamps can drop to 60-70% efficiency at spa temperatures, while amalgam lamps maintain near 100% output.

Q: How long does the amalgam lamp last?

A: The amalgam lamp has a lifespan of 14,000 hours — approximately 2+ years under normal use. This is significantly longer than standard pool UV lamps (9,000 hours).

Q: What size spa is this suitable for?

A: The HR-30-UK-SPA is designed for spas up to 30,000 litres (30m³) with a minimum filtration turnaround of three times per day. Suitable for residential hot tubs, swim spas, and commercial spa installations.

Q: Will this fit my spa system?

A: The H.R.UV-C Spa connects via 2″/63mm stepped ABS unions, with reducers included for 1½”/50mm pipe. Ensure your flow rate is at least 1.5m³/h and does not exceed 12m³/h.

Q: Is this compatible with bromine?

A: Yes. The system is compatible with both chlorine and bromine sanitised spas. Maximum total bromine level is 4.5 mg/litre.

Q: Is this compatible with salt water?

A: Yes. The H.R.UV-C Spa is 100% compatible with chlorinated salt water and sea water spas.

Q: Does this eliminate the need for chemicals?

A: UV-C sterilisation does not provide residual sanitisation, so it must be used in conjunction with chemical sanitisers. However, it significantly reduces chemical dependency and helps reduce chlorine/bromine odours.

Q: What’s the warranty?

A: 2 years within Europe, 1 year outside Europe. The warranty does not include serviceable parts such as lamps, quartz sleeves, and O-rings.

Q: Is there a Pro model with dosing pump?

A: Yes. The HRP-30-UK-SPA includes a digital lamp life countdown and intelligent peristaltic dosing pump for automated chemical dosing.

📥 Downloads

📄 Product Data Sheet (PDF) – Complete technical specifications

📄 Installation & Operating Manual (PDF) – Full installation and maintenance guide

📄 Product Leaflet (PDF) – Features and benefits overview

🏆 Why Choose the Elecro H.R.UV-C Spa Classic?

✅ Spa-Optimised Technology – Amalgam lamp maintains performance at elevated spa temperatures

✅ Extended Lamp Life – 14,000 hours for reduced maintenance and lower running costs

✅ Supreme Efficiency – E-PTFE chamber with up to 95% UV reflection

✅ Consistent Performance – Near 100% UV output from 0°C to 40°C

✅ Compact Design – Space-efficient for spa equipment installations

✅ Professional Monitoring – Analogue lamp life indicator with colour-coded LED status

✅ Flow Switch Protection – Integrated safety monitoring prevents dry running

✅ Destroys Resistant Pathogens – Neutralises bacteria, viruses, algae and fungi

✅ Chemical-Free Sterilisation – No harmful gases or by-products produced

✅ Salt Water Compatible – 100% safe for chlorinated salt and sea water spas

✅ UK Manufactured – Engineered and built by Elecro Engineering in Stevenage

✅ Comprehensive Warranty – 2-year warranty backed by UK-based manufacturer support

🤝 Why Buy from Parts4Tubs?

✅ UK-Based Company – Local support from our Northamptonshire headquarters

✅ Fast UK Delivery – Quick dispatch to get your spa running

✅ Expert Advice – Spa and hot tub specialists available to help with product selection

✅ Competitive Pricing – Great value on genuine Elecro products

✅ Full Warranty Support – We support your warranty claims with the manufacturer

✅ Easy Returns – 30-day returns policy for peace of mind

✅ Replacement Parts Available – Amalgam UV lamps, quartz sleeves, and O-rings

✨ Summary

The Elecro H.R.UV-C Spa Classic (HR-30-UK-SPA) is specifically engineered for hot tub and spa applications, featuring advanced amalgam lamp technology that maintains consistent UV-C output at elevated spa temperatures where standard lamps lose efficiency. With an impressive 14,000-hour lamp life — significantly longer than pool UV systems — and the revolutionary E-PTFE super reflective chamber providing up to 95% UV reflection, this British-manufactured system delivers supreme sterilisation efficiency for spas up to 30,000 litres. The compact design, analogue lamp life indicator, flow switch protection, and 100% salt water compatibility make it the ideal choice for residential hot tubs, swim spas, and commercial spa installations. Neutralise bacteria, viruses, algae, and fungi that traditional chemicals cannot, reduce chemical dependency, and enjoy crystal clear, odour-free spa water with a 2-year European warranty.