ofm hvac meaning

Conversion to the Celsius temperature scale, use this equation: Deduct 32, then multiply by 5, then divide by 9A fan coil unit (FCU) is a device that uses a coil and a fan to heat or cool a room without connecting to ductwork. The network allows these computers or devices to communicate with each other and share resources and information.An off-grid or off-the-grid system is an electricity-generating system that operates independently from the utility grid, providing all of the electricity needed in the home, and is generally more expensive than grid-tied system ideal for buildings located in remote areas without utility service, or where installing power lines would be extremely costly.An oil furnace is the part of an HVAC system that converts heating oil (similar to diesel) into high-temperate heat for the home.A set of connectivity standards for industrial automation from the OPC Foundation. liquefied petroleum gas, gasoline), and biomass.Arrangement in which two or more refrigerating systems are used in series.Space below the flooring and above the suspended ceiling that accommodates the mechanical and electrical equipment and that is used as part of the air distribution system. This coil usually has a direct expansion valve connected to the coil distributor.A type of water heater in which heated water is stored within the tank. This circulated air is cooled/heated and then sent through the supply duct, past dampers, and through supply diffusers to the living/working space.A system for centralizing and optimizing the monitoring, operating, and managing of a building. Deadband is used in voltage regulators and other controllers. This water is replaced with cold water that flows into the tank and down to just above the bottom plate under which are the burners.This type of furnace processes air from top to bottom.A column of burning combustion gases that are so hot and strong that the heat is lost up the chimney before it can be transferred to the house. Proportion also refers to the equality of two ratios.The change in input required to produce a full range of change in the output due to the proportional control action.

Volatile organic compounds vaporize at room temperature and pressure. By heating the crankcase oil to a higher temperature than the coldest part of the system, refrigerant remains in its vapor form.HVAC term for controls that vary airflow through an air outlet, inlet, or duct. Often applied to insulation batts or separately in the form of treated papers, plastic sheets, and metallic foils.A HVAC system that has a stable supply-air temperature, and varies the air flow rate to meet the temperature requirements. The capacitance of a capacitor is measured in farads and is determined by the formula C = q/V, where q is the charge (in coulombs) on one of the conductors and V is the potential difference (in volts) between the conductors. Touchscreens can also sense other passive objects, such as a stylus.A device, usually electrical, electronic, electro-mechanical, electromagnetic, photonic, or photovoltaic that converts one type of energy or physical attribute to another for various purposes including measurement or information transfer (for example, pressure sensors).The base required for a high-efficiency air conditioner, two-speed motors cycle on in low gear and attempts to satisfy the cooling load for the home, shifting to high gear if necessary. Get latest updates, multilingual resources, and details of Gov. They are found in many indoor sources, including many common household products and building materials.Air taken from the external atmosphere and, therefore, not previously circulated through the system.HVAC term for air brought into a building from the outdoors (often through the ventilation system) that has not been previously circulated through the system. Both air conditioners and heat pumps use refrigeration to move heat. Thus, the room heats from the bottom up. Sometimes, however, used in reference only to the air brought into the system from the outdoors; this document defines this air as “outdoor air ventilation.”The rate at which indoor air enters and leaves a building.

They’re generally louder at start-up, consume more energy than alternative motor types and can cause more stress on mechanical parts.A collection of computer programs, procedures and documentation that perform some tasks on a computer system.The weight of water vapor, per unit weight of dry air.HVAC term for an air conditioning system that comes in two to five pieces: one piece contains the compressor, condenser, and a fan; the others have an evaporator and a fan.

The air from a room will move towards the lower pressure of the return duct.Used in both lower and higher efficiency air conditioners, scroll compressors are popular because they feature fewer moving parts than reciprocating compressors. Definition. A device that facilitates the combustion of fuel and air to create heat and then circulates it through the home by means of a fan.A delicate metal strip connecting two parts of an electrical circuit. Expressed in one of two ways: the number of changes of outside air per unit of time – air changes per hour (ACH); or the rate at which a volume of outside air enters per unit of time – cubic feet per minute (CFM).HVAC term for a fan-blower, heat transfer coil, and housing parts of a system.In HVAC refers to equipment that includes a blower or fan, heating and/or cooling coils, and related equipment such as controls, condensate drain pans, and air filters. Once it reaches the desired temperature, it cycles back down to low before shutting off. Propane liquefies under pressure and is the major component of liquefied petroleum gas (LPG).Two quantities are said to be proportional if they vary in such a way that one of the quantities is a constant multiple of the other, or equivalently if they have a constant ratio.