120L Evacuated Tube Pressure Solar Pool Heater Bathroom Water Heater
The 120L Evacuated Tube Pressure Solar Pool Heater Bathroom Water Heater is a versatile compact integrated solar thermal unit built on heat‑pipe evacuated tube technology. Designed to deliver pressurized hot water for household bathroom bathing, kitchen cleaning, and small‑size above‑ground swimming pools, this dual‑purpose unit connects directly to municipal tap‑water supply without extra gravity feed tanks. Different from traditional non‑pressure solar devices, vacuum tubes hold no domestic water; thermal energy transfers through sealed phase‑change heat‑pipes, bringing reliable freeze‑resistance and anti‑leakage performance. With 120 liters storage capacity, this all‑in‑one solar heater fits small‑to‑medium family daily hot‑water consumption and satisfies low‑volume pool heating requirements for backyard mini pools and spa tubs. It cuts monthly utility bills, reduces fossil fuel reliance, and delivers stable high‑flow hot‑water output under varying outdoor weather for both indoor bathroom usage and outdoor small pool heating scenarios.
Working Principle
- High‑borosilicate evacuated glass tubes capture incoming solar irradiance. Multi‑layer selective absorbing coatings convert sunlight into thermal energy and warm the aluminum fin attached to each sealed copper heat‑pipe. Low‑boiling working fluid sealed inside heat‑pipes vaporizes quickly after absorbing heat. Hot vapor rises upward toward the condenser tip inserted inside the pressurized storage tank, releases latent heat and warms the stored water. After heat release, vapor condenses back into liquid and flows down to the bottom evaporation section under gravity, repeating continuous phase‑change heat transfer cycles. No tap‑water or pool water flows inside evacuated glass tubes throughout the whole process.
- The 120L enclosed storage tank runs under full municipal working pressure. Cold tap‑water enters the tank inlet directly, and hot water flows out with original pipeline pressure to bathroom showers, faucets or small pool circulation pipelines. Even if individual vacuum tubes suffer physical damage, no water leakage occurs, and remaining collector components keep operating normally.
- When solar irradiation is insufficient during overcast or rainy periods, users can activate the optional built‑in electric heating cartridge for supplementary heating. For small pool heating applications, hot water circulates through external pipeline loops to raise pool temperature. Intelligent temperature‑pressure relief valve protects tank safety against over‑heat and over‑pressure risks.
Important note: This pressurized unit is designed for household bathroom hot‑water and small‑volume mini‑pool heating. It is NOT suitable for large‑capacity standard swimming pools. Professional installers must complete rooftop or ground mounting, pressure resistance testing and leakage inspection before commissioning. All exposed outdoor pipelines need PU thermal insulation sleeves. In cold frost‑prone zones, pipeline anti‑freeze protection is required, even though heat‑pipe collectors resist freezing. Never power on auxiliary heating unless the tank is fully filled with water. Regularly inspect temperature‑pressure relief valve to guarantee unblocked pressure release.
Core Technical Specifications
‑ Nominal Tank Capacity: 120L ‑ Inner Tank Liner: SUS304‑2B food‑grade stainless steel, argon‑shield welding; replaceable magnesium sacrificial anode rod ‑ Outer Casing: Powder‑coated color steel or polished stainless‑steel sheet with UV‑resistant treatment ‑ Insulation Layer: 50‑55 mm high‑density integral injected closed‑cell PU foam for long‑term heat retention ‑ Rated Working Pressure: 0.6 MPa, equipped with integrated temperature‑pressure safety relief valve ‑ Solar Collector: Φ58×1800 mm borosilicate 3.3 heat‑pipe evacuated vacuum tubes, high‑selectivity absorbing coating ‑ Circulation Principle: Passive thermosiphon phase‑change heat‑pipe heat transfer, zero power consumption for solar heating cycle ‑ Water Supply Mode: Direct municipal tap‑water connection, no auxiliary feed tank required ‑ Auxiliary Heating: Optional 2000W built‑in electric heating element ‑ Applicable Pool Volume: 3‑12 m³ small backyard above‑ground pool, spa tub and mini leisure pool ‑ Mounting Structure: Heavy‑duty galvanized steel bracket, adjustable tilt angle for flat roof and sloped tile roof installation ‑ Hail Resistance: Tolerates 25‑30 mm hail impact under standard installation conditions ‑ Expected Service Life: 13‑18 years under standardized operation and periodic maintenance ‑ Available Certifications: CE, ISO9001 for household export and small residential project supply
Typical Application Scenarios
‑ 2‑4‑person small‑to‑medium‑size family daily bathroom hot‑water, shower and laundry usage ‑ Backyard mini above‑ground pools, small spa tubs and portable leisure pool heating ‑ Holiday cottages, guest houses and remote residential locations with abundant solar resources ‑ Rooftop installation projects with limited available mounting space ‑ Home renovation projects upgrading old non‑pressure solar units to high‑pressure hot‑water solution ‑ Users expecting consistent high‑pressure shower experience and low leakage failure risk
Place collector arrays in fully unshaded locations to secure minimum 4‑6 hours of effective direct sunlight each day. This 120L unit cannot deliver enough thermal output for large‑volume public swimming pools. Confirm actual pool water volume before selecting this product for pool‑heating purposes.
| Feature | 120L Evacuated Tube Pressure Solar Pool & Bathroom Water Heater | 120L Non‑Pressure Evacuated Tube Solar Water Heater | Large‑Scale Commercial Solar Pool Heating System |
|---|---|---|---|
| Tank Working Status | Fully pressurized tank, matches municipal tap‑water pressure | Atmospheric non‑pressure working mode | Pressurized closed‑loop heat‑exchange system |
| Water Inside Vacuum Tubes | No water inside tubes, sealed heat‑pipe transfer | Domestic water flows directly inside glass tubes | Antifreeze heat‑transfer medium circulates in collector array |
| Hot‑Water Outlet Pressure | Mains‑level stable water pressure | Only gravity water‑head pressure | Depends on supporting circulation pump configuration |
| Primary Usage Scenario | Household bathroom plus mini small‑volume pool heating | Only domestic bathroom hot‑water | Large‑capacity commercial public swimming pools |
| Broken Tube Consequence | No water leakage, system keeps running | Serious water leakage triggers system shutdown | Medium leakage risk needs professional repair |
| Required Auxiliary Feed Tank | Not required | Mandatory for safe water supply | Not required, equipped with expansion vessels |
| Overall Investment Level | Mid‑range household grade | Economical entry‑level household grade | High‑investment commercial engineering grade |
Key Selection & Design Considerations
- Usage‑purpose confirmation: Clarify whether the unit works mainly for bathroom hot‑water, occasional mini‑pool heating or dual‑mode mixed application. Remember that pool heating will consume large portions of stored thermal energy and reduce hot‑water supply for indoor bathroom use.
- Installation‑site evaluation: Measure rooftop load‑bearing capacity for full water‑filled unit static weight. Select completely unshaded mounting area and adjust collector tilt angle according to local latitude for maximum solar absorption. Wind‑resistant bracket must satisfy local wind‑load standards.
- Pipeline configuration for pool heating: When connected to mini‑pool circulation, install independent circulating pump, filter unit and check‑valve on external pool pipeline loop. Avoid back‑flow of pool water into the domestic hot‑water storage tank.
- Environment adaption: For coastal salt‑spray regions, select stainless‑steel outer casing version and regularly inspect magnesium anode rod consumption. Although heat‑pipe tubes resist freezing, all exposed water pipelines should be wrapped with anti‑freeze insulation sleeves in cold zones.
- Quotation scope verification: Confirm supply scope including integrated tank‑collector assembly, mounting bracket, safety valve assembly, sealing fittings. Clarify whether built‑in electric heating element and pool circulation accessories belong to supply range.
- Customization and export compliance: Support bulk‑order adjustment for tube quantity and accessory configuration. Provide complete CE and ISO certification documents for overseas import customs clearance.
Installation & Routine Maintenance
Only qualified solar thermal technicians should finish installation work. Complete water filling, whole‑system pressure‑resistance test and leakage inspection before putting into service. Verify safety relief valve working performance during commissioning.
‑ Every 3‑6‑month routine inspection: Clean dust and fallen leaves from evacuated tube outer surfaces; check tank outer casing for corrosion and scratch marks; inspect all pipe joints for water seepage; confirm temperature‑pressure relief valve functions normally. ‑ Every 1‑2‑year professional service: Replace consumed magnesium sacrificial anode rod to protect inner stainless‑steel tank liner; inspect vacuum tube performance; tighten bracket fastening bolts and check anti‑rust status. If used for pool heating, clean external pool filter components on a regular schedule.
FAQ
Q: Can this 120L pressurized solar heater serve both bathroom hot‑water and small pool heating at the same time?
A: Yes, it supports dual‑purpose application for household bathroom bathing and mini‑pool heating. Users should notice that pool heating consumes large thermal capacity. When pool heating runs continuously, available hot‑water volume for indoor bathroom usage will decrease accordingly. For large‑volume swimming pools, this unit is not powerful enough.
Q: What advantages does heat‑pipe pressurized structure bring compared with traditional non‑pressure evacuated tube solar heaters?
A: Vacuum tubes contain no domestic or pool water. Even glass tubes crack, there will be no water spillage. Direct connection to municipal tap‑water delivers stable high‑pressure shower experience without auxiliary gravity feed tank. Heat‑pipe components show excellent low‑temperature performance for cold‑climate regions.
Q: Is extra feed tank needed for this 120L pressure solar water heater?
A: No auxiliary feed tank is required. The whole storage tank is pressure‑bearing, users can directly link cold municipal tap‑water pipeline to the system inlet port.
Q: Does the heat‑pipe evacuated tube still risk freeze damage in winter?
A: Working fluid inside sealed heat‑pipes will not freeze. However, exposed inlet‑outlet water pipelines may freeze under extreme low‑temperature conditions. Thermal insulation sleeves for pipelines are still essential in frost‑prone areas.
Q: What size of pool is suitable to match this 120L solar unit?
A: It is only recommended for mini backyard pools within 3‑12 m³ water volume. For pools with larger water capacity, you need multiple sets or dedicated professional solar pool heating systems.
Final Conclusion
120L Evacuated Tube Pressure Solar Pool Heater Bathroom Water Heater is a practical dual‑function compact solar thermal solution for residential end‑users. Adopting mature heat‑pipe evacuated‑tube phase‑change heat‑transfer technology, the pressurized tank connects directly to municipal tap‑water and provides stable high‑pressure hot‑water output for family bathroom bathing, washing and small‑volume backyard pool heating. Since no water flows inside vacuum tubes, the system obtains prominent anti‑leakage and cold‑weather adaptability. Its 120‑liter storage capacity perfectly matches hot‑water demand for small‑to‑medium‑size households. Users must keep in mind that this integrated unit targets domestic and mini‑pool scenarios rather than large‑capacity commercial swimming pools. Correct installation location, necessary pipeline anti‑freeze measures and periodic maintenance can extend equipment service life. With optional auxiliary electric heating for low‑sunlight days, this solar heater effectively cuts conventional energy consumption and brings reliable green hot‑water supply for multi‑scene household usage.
