You might be curious about packaged rooftop units after seeing them on top of a number of large commercial spaces. Also known as RTUs, they’re actually very popular with retail and industrial properties since they already come complete with the main components, including the evaporator, compressor, air-cooled condenser and an expansion device. Sherrell Air Conditioning & Heating, a specialist in HVAC maintenance, explains what you need to know about them here:
How an RTU Works
Most packaged rooftop units are rectangular, with the parts inside assembled next to each other. You’ll probably notice the casing first from the outside; it’s made of metal, but it’s much sturdier than that on an indoor unit because it’s made to withstand the elements. You’ll also notice the following:
Air hood – You’ll see this on one side of the unit. It allows air from the outside to enter, which will then get warmed or cooled before being distributed inside the building. There’s an awning on top of it with room for air to enter underneath. This way, precipitation and debris can’t get in.
Dampers – The air passes through dampers, which are rotating metal sheets. These prevent air from escaping, and they can run at different speeds to regulate how much air gets in.
Filters – After passing through the dampers, the air goes through the filters, which work like those in any other unit. They need to be cleaned or replaced by professional air cleaners, and they’ll do this through an access panel on your unit.
Coils – The air will reach the coils after passing through the filters. They’ll transfer thermal energy and add warmth. During routine maintenance, if there’s an issue found in this part of your unit, it should be addressed as soon as possible.
Fan, compressor and condenser – The fan is responsible for pulling air into the unit, as well as pushing the now-treated air into the ductwork. Behind this is the compressor and condenser, which are responsible for heating or cooling the air.
How is an RTU Different?
One of the main reasons why an RTU is sometimes called a “packaged unit” is because it includes all the components of a typical air conditioning and heating system that are normally sold separately. This is also different from installing other types of units, such as water-cooled systems or split-system air conditioning condensers, but they’ll still need regular maintenance checks. They can also come with specialized applications, depending on your needs and preferences, and will provide all the heating and air conditioning necessary for your commercial property.
Whether help is needed with air conditioners or gas furnaces, you can count on the services offered at Sherrell Air Conditioning & Heating. We’ll get the job done right! Contact us at (972) 216-1961 if you’re in Dallas or (713) 595-4986 if you’re in Houston. You can also reach us through our convenient online request form.