HVAC Equipment For Sale Buy and Sell Used HVAC Equipment. Search by Manufacturers: Trane, Carrier, Lennox, York, Greenheck We provide useful tips and information for homeowners, facility managers and contractors looking to improve their current HVAC system. The most popular hydro-fluorocarbon (HFC) refrigerants for new commercial air conditioning systems include R-410A, R-407C and R-134a.  As a facility manager or owner, it’s important that you understand these different refrigerants so that you can make informed decisions for your facility’s air conditioning system. Outlined below are the main differences between HFC refrigerants and additional context on why having the right refrigerant matters. Often referred to by a brand name, such as Freon® As of 2010, R-22 was discontinued for use in new air conditioning systems By 2015, the use of R-22 must be discontinued across the board R-22 is a hydro-chlorofluorocarbon (HCFC) that contributes to ozone depletion

Often referred to by a brand name such as Puron®, Suva® 9100, or Genetron® AZ-20® Has been approved for use in new systems It is a hydro-fluorocarbon (HFC) that does not contribute to ozone depletion R-410A operating pressures are more than 50% higher than R-22 and R-410A systems require components capable of working at these higher pressures R-410A is the most common refrigerant for new light commercial unitary air conditioning systemsstand up air conditioner unit Often referred to by a brand name such as Suva® 407C or Genetron® 407Cprice of ac window unit R-407C is a hydro-fluorocarbon (HFC) that does not contribute to ozone depletiongas powered ac units Of the higher temperature HFC options, R-407C most closely matches the operating characteristics of R-22

It is a high-glide refrigerant with lower efficiency, but provides the simplest conversion from R-22 due to its similar pressures Widely used in many air conditioning and refrigeration systems globally It is a hydro-fluorocarbon (HFC) that does not contribute to ozone depletion; also the first non-ozone-depleting fluorocarbon refrigerant to be commercialized It is a single-component refrigerant with no glide, featured in many large commercial screw chillers Emerson Climate Technologies and other industry partners have identified R-410A as an excellent long-term solution for residential and light commercial air-conditioning, due to its combination of high-efficiency performance and direct GWP value, which is close to that of R-22. System manufacturers have had great success with R-410A because of its energy efficient properties and ease of use in their systems.  In addition, components are now widely available for designing efficient R-410A systems. Newer air conditioning models are designed to be used with R-410A for reliable and more efficient operation.

Because R-410A can absorb and release more heat than R-22, an air conditioning compressor can run at a cooler temperature, reducing the risk of compressor burnout due to overheating. R-410A also functions at a higher pressure than R-22, so new compressors are built to withstand greater stresses, reducing the chance for cracking. If someone were to put R-410A refrigerant into a system designed for R-22, the pressure would be too much and the unit would break. All air conditioners use an oil to keep the compressor lubricated during operation. R-22 air conditioners use mineral oil and R-410A systems use Polyol Ester oil (POE).  POE oil is generally more soluble with R-410A than mineral oil is with R-22. This means the R-410A system operates more efficiently, reducing wear and tear on the compressor. In addition, temperature glide is a property of some HFC refrigerant blends or mixtures and is generally undesirable.  Because the composition alters during a phase change, there is a slight change in evaporating and condensing temperature at constant pressure. 

Commercial air conditioning systems that use higher glide refrigerants are usually designed to work around the problems associated with glide, with little or no effect on system performance. Some states and local utilities offer tax incentives or rebates for buildings and systems that meet green codes.  The most popular rating system, LEED, was developed by the U.S. Green Building Council in conjunction with the Department of Energy, Environmental Protection Agency, and many state organizations.  The sustainable design goals of the LEED program include many economic benefits for facility managers and building owners.  Climate control systems play a big part in LEED design. Efficient and environmentally-friendly equipment not only score LEED points, but can also earn rebates and have a quick payback period. What else have you heard about these refrigerant alternatives? Here are a few links to other articles on the topic of refrigerants: New Refrigerant Conversion – “What to Expect and What You Need to Know about Transitioning Refrigerants”

“Drop In” Refrigerants Can Drop You Out of Warranty: Why Refrigerants Matter What’s the Difference Between R-22 and R-410A?Refrigeration and air-conditioning end-uses typically use a refrigerant in a vapor compression cycle to cool and/or dehumidify a substance or space, like a refrigerator cabinet, room, office building, or warehouse. Chillers typically cool water, which is then circulated to provide comfort cooling throughout a building or other location. Chillers can be classified by compressor type, including centrifugal, reciprocating, scroll, screw, and rotary compressors. Chillers used to cool industrial processes are included under Industrial Process Refrigeration. Cold storage warehouses store meat, produce, dairy products, and other perishable goods. The majority of cold storage warehouses in the United States use ammonia as the refrigerant in a vapor compression cycle, although some rely on other refrigerants. Commercial ice machines are used in commercial establishments (e.g., hotels, restaurants, convenience stores) to produce ice for consumer use.

Ice machines produce ice in various sizes and shapes, and with different retrieval mechanisms (e.g., dispensers or self-retrieval from bins). Ice makers that are part of a refrigerator-freezer are considered part of the latter end-use, while equipment that is solely used to make ice, even if used in a domestic setting, is considered part of the commercial ice machine’s end-use. Household Refrigerators and Freezers Household refrigerators and freezers are intended primarily for residential use, although they may be used outside the home. Household freezers only offer storage space at freezing temperatures. Products with both a refrigerator and freezer in a single unit are most common. Small refrigerated household appliances may also include chilled kitchen drawers, wine coolers, and mini fridges. Ice skating rinks are used by the general public for recreational purposes and also include professional rinks. These systems frequently use secondary loop refrigeration systems.

Industrial Process Air Conditioning Industrial process air-conditioning units, which are distinct from commercial and residential air conditioning, provide comfort cooling for operators and protect process equipment. This end-use is often used when ambient temperatures approach 200°F (93°C) and corrosive conditions exist. Industrial process refrigeration systems cool process streams in industrial applications. The choice of substitute for specific applications depends on ambient and required operating temperatures and pressures. Motor Vehicle Air Conditioning Motor vehicle air-conditioning systems (MVACs) provide comfort cooling for passengers in light-duty cars and trucks, buses, trains, and other forms of transportation. Non-Mechanical Heat Transfer Systems Non-mechanical heat transfer systems include cooling systems that do not rely on a vapor compression cycle, such as those using convection to remove heat from an area. Two types of such systems are recirculating coolers, i.e., systems with fluid pumps, and thermosiphons, i.e., those that rely on natural convection currents.

This end-use also includes Organic Rankine Cycle (ORC) devices that typically pump refrigerant to recover and utilize energy from lower-temperature heat rejected from other processes. Residential and Light Commercial Air Conditioning and Heat Pumps This end-use includes equipment that cools enclosed spaces in households and commercial industries, but excludes chillers―which include room air conditioning such as window units, packaged terminal air conditioners (PTAC) and heat pumps (PTHP), and portable air conditioners; central air conditioners (i.e., ducted); non-ducted systems (both mini and multi splits); water-source and ground-source heat pumps; Residential and light commercial air conditioning and heat pumps are often distinguished from chillers by the fact that they condition the air directly, rather than cool (or heat) water that is then used to condition air. Residential dehumidifiers are primarily used to remove water vapor from ambient air or directly from indoor air for comfort or material preservation purposes.

While air-conditioning systems often combine cooling and dehumidification, this application serves only the latter purpose. Refrigerated transport moves products (e.g., perishable goods) from one place to another by various modes of transportation while maintaining necessary temperatures, including refrigerated ship holds, truck trailers, railway freight cars, ships, and other shipping containers. Retail food refrigeration, or commercial refrigeration, includes equipment designed to store, display, process, or dispense chilled or frozen goods for commercial sale. This end-use includes these categories of equipment: stand-alone equipment, remote condensing units, supermarket systems, and refrigerated food processing and dispensing equipment. Vending machines are self-contained units that dispense goods that must be kept cold or frozen. Very Low Temperature Refrigeration Very low temperature refrigeration systems require maintaining temperatures at approximately -80 degrees Fahrenheit (-62 degrees Celsius) or lower.