A household furnace is a major appliance that is permanently installed to provide heat to an interior space through intermediary fluid movement, which may be air, steam, or hot water.n industrial furnace or direct fired heater, is an equipment used to provide heat for a process or can serve as reactor which provides heats of reaction. Furnace designs vary as to its function, heating duty, type of fuel and method of introducing combustion air.
Need for Water Like all living things, plants need water to survive. Plants use water to maintain their shape, obtain energy through photosynthesis, collect dissolved nutrients from the soil, transfer small molecules throughout the plant, and cool off leaves in hot weather through evaporation. Because they need so much water, plants must have an efficient system to collect it. Roots. Plants obtain water through the soil. The roots are the transportation system to get the water from the soil and to the parts of the plant where it is needed. The roots branch off into smaller and smaller roots, and the smallest roots are called root hairs.
How does it do this? Water moves through the plant by means of capillary action. Capillary action occurs when the forces binding a liquid together (cohesion and surface tension) and the forces attracting that bound liquid to another surface (adhesion) are greater than the force of gravity. The plant's stem sucks up water much like a straw does. A process called transpiration helps the capillary action to take place. Transpiration is when the water from the leaves and flower petals evaporates, or, in other words, the water leaves the plant and goes into the surrounding air. As the water evaporates, the plant pulls up more water. A simple way of observing capillary action is to take a teaspoon of water and gently pour it in a pool on a countertop, as shown in Figure 1a below. You will notice that the water stays together in the pool, rather than flattening out across the countertop.