1 Solar-powered home water heaters cost $1,000-$3,500 (including installation) but have extremely low monthly operating costs and can be used in any climate, according to the US Department of Energy.2  The cost for a solar heating system can vary widely. Prices vary based on building and system configuration, the type of equipment selected and other factors. 2  Generally it costs less to install a system in a new home rather than remodeling an existing one, although it can be practical to install a solar system while replacing the roof.
herb, spice, seasoning - Herbs are, technically, plants with aerial parts used for seasoning foods, and a spice (also called seasoning) is any substance used for seasoning foods; many herbs are used as spices, but not all.
noun. 1 Any plant with leaves, seeds, or flowers used for flavouring, food, medicine, or perfume: bundles of dried herbs [as modifier]: a herb garden. More example sentences. 1  I also find the green leaves of ivy, herbs and other plants are beautiful as well. I also find the green leaves of ivy, herbs and other plants are beautiful as well. 2  You can take time to select chocolate or apple mint, lemon basil, and pungent garlic from an herb garden. 3  This article explains how to start an indoor herb garden from plants or seed and how to properly care for it.