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The direct air heater takes the space air or fresh air and mixes it with hot gasses from a flame source such as natural gas flame or oil fired flame and returns / redirects it to the space to be heated. The warm air contains all the flame byproducts and toxic gasses along with. This type of air handling system is used in industrial environment where the human beings are not exposed to such warm air.
In the indirect system the hot flame gasses circulate through a metallic high efficiency heat exchanger which isolates the flame gasses (aka flue gasses) from that of the air to be warmed by passing from the other side of the heat exchanger. This type of air is safe for human exposure as the flame products and toxic COx, NOx and SOx are isolated. usually all the domestic air heaters are of indirect type.
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What is the difference between direct fired and indirect fired gas heaters?
With a direct fired system the airflow goes directly over the flame. An indirect fired air heater has a heat exchanger that the air passes over. Indirect units provides heat without contamination from combustion by-products.
Difference between direct and indirect cathode ray?
In a directly heated cathode, the filament is the cathode and emits the electrons. In an indirectly heated cathode, the filament or heater heats a separate metal cathode electrode which emits the electrons.
What is the difference between indirect and direct hot water cylinders?
Direct hot water cylinders are heated directly by an immersion heater within the cylinder, whereas indirect hot water cylinders are heated indirectly by a boiler or other external heat source through a coil or heat exchanger within the cylinder. Indirect cylinders are more efficient as they can be connected to renewable energy sources like solar panels or heat pumps.
What are The differences between direct and indrect heating?
Direct heating involves transferring heat directly to the substance being heated, while indirect heating involves transferring heat to a medium, such as a fluid or gas, which then transfers the heat to the substance. Direct heating is more efficient and faster, while indirect heating provides better control over temperature and minimizes the risk of overheating the substance.
What is the difference between an indirect cylinder and a direct cylinder?
An indirect cylinder is heated by an external heat source, such as a boiler, where the water within the cylinder does not come into contact with the heat source directly. A direct cylinder, on the other hand, has an internal heating element, such as an immersion heater, that heats the water within the cylinder directly.
Is there a difference between a desuperheater and an attemperator?
A desuper heater is for low and medium pressure and temperature application as required in process plants. Attemperator covers all the range depending on the steaming parameters of the boiler. In functioning, they are both the same i.e. they remove the superheat of the steam with help of water either by direct contact with spray or by indirect contact in a heat exchanger.
Is a direct vent water heater as good as a standard vent water heater?
a direct vent water heater is more fuel efficient (cost's less to operate). aside from that there isn't much difference, aside from not needing a double wall flue through the roof on a standard gas water heater.
What is the difference between heater and heat recovery?
Heater produsces - heat recovery finds heat and reuses it
Why did the water in your aquarium heat up without turning up the heater?
Lighting, both direct (lightstrip) and indirect (sun in the window), all motors including pumps/filters, room temperature
How do you convert hot water from a boiler to water heater?
== == It is accomplished by adding an indirect fired water heater and controls.
What is the difference between a power vented gas water heater and a standard gas water heater?
The difference between a mobile gas water heater and a standard gas water heater is that a MH unit will use an outside air intake for combustion. That is the most important difference.
What heater offers the most BTU's?
the Frost Fighter IHS #700 Indirect Space Heater ahs 700000 BTUs.
