proper load calculation

When contractors talk about air conditioner capacity, they usually measure a system’s cooling performance in tons. There’s a good reason for this and it stretches back to the turn of the century, when keeping homes and foodstuffs cool was done quite differently. During the late 19th and early 20th centuries, most cooling and refrigeration was done with blocks of ice. Just like modern-day refrigerant, the ice removed heat from a space by absorbing it. As the block of ice reached […]