
New furnaces now use different ignitors that don’t burn constantly, so they don’t use as much energy.
Gas stoves today use two basic types of ignition sources, standing pilot and electric. A stove with a standing pilot has a small, continuously burning gas flame under the cooktop.
Fireplaces today have a greater energy efficiency than in previous years. This is done in a few different advancements. First and foremost is the design of the fireplace cabinet itself.
Room air conditioners come in two forms: unitary and packaged terminal PTAC systems. Unitary systems, the common one room air conditioners, sit in a window or wall opening, with interior controls.
HVAC is particularly important in the design where safe and healthy building conditions are regulated with temperature and humidity, as well as “fresh air” from outdoors.