Hot water. From the sky. For free.
Vacuum-tube collectors that deliver 200+ liters of hot water per day using nothing but sunlight — even in winter.
A boring appliance
that saves you money every morning.
Everyone talks about PV. Meanwhile, hot water is 25–30% of a household's energy bill, and a vacuum-tube collector solves it with zero moving parts and one afternoon of installation. It pays back faster than a solar system and lasts almost as long.
200 L a day
Enough for a family of four, with two spare showers on top.
Up to 90°C
In summer the tank hits scalding — we install a mixer to keep taps at a safe 55°C.
3.1 year payback
Median gas-bill drop of 54% across every install we did in 2023.
10 years on the tank
Enamel-lined stainless steel. We've replaced exactly two tanks since 2013.
Simple, robust, deeply boring.
No pumps on the household models. No electronics on the roof. A physics trick from the 1970s, refined for Armenian winters.
| Type | Vacuum tube, thermosiphon or pumped |
| Tank capacity | 150 / 200 / 300 L |
| Tubes | 15 / 20 / 30 borosilicate glass |
| Temperature range | 60–90 °C typical output |
| Freeze protection | Antifreeze glycol loop (winter) or heat pipe |
| Backup heater | Electric 1.5 kW element with thermostat |
| Warranty | 10 years tank / 5 years tubes |
Ready to cut your bill by 90%?
Our engineers will visit your property, measure your roof, and hand you a detailed proposal — completely free.