作者姓名：Millionsun R&D Team

Solar air heaters explained: how glazed and transpired collectors work, ventilation preheating, drying and space heating uses, sizing, payback and limits.

Solar greenhouse heating options compared: solar water, solar air and thermal mass, with sizing method, storage, backup heat and when solar is enough.

Solar pool heating systems explained: how they work, glazed vs unglazed collectors, sizing by pool area, siting, cost and payback.

What drives solar water heater installation cost: price ranges by system type, labour, backup heaters and payback, plus how to quote a project.

Solar hot water system types explained: direct, indirect, active, passive, thermosyphon and drainback, with a selection table by climate.

Compare evacuated tube, flat plate and heat pipe solar collectors on temperature, efficiency, cost and durability, and choose the right type.

Solar heating explained: how active and passive systems work for water, air and space heating, their limits, and which to specify by climate.

Solar thermal vs photovoltaic for hot water: efficiency, cost, roof area and project fit, with a decision table for installers and EPC firms.

Enamel vs stainless steel solar water tank: chloride limits for 304L and 316L, anodes, scale and hard water, and how importers should choose by market.

Solar absorber plate sourcing guide: black vs blue coating, aluminium vs copper fin, welding, specification checklist and how to test samples.