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Your Guide to Choosing a Standalone TXV: Sizing, Types, and Costs

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In an earlier post, we covered the basics of the Thermostatic Expansion Valve (TXV) -- what it does (and does not do), plus some of the considerations you have to make when deciding whether or not to add a TXV to your purchase or purchase a standalone TXV for an existing system. With newer systems, you may not have to make that choice at all, since a TXV is often already incorporated for efficiency purposes. However, if it becomes clear that you need to add a standalone TXV to your system, it is important to make sure you choose the right product for your system. Read on for more information about the sizing, refrigerant types, and costs of purchasing a standalone TXV.

The Right Model for Your System

When buying a standalone TXV, you have to choose one that is consistent with the cooling capacity of your system. The cooling capacity is a measure of your air conditioning system’s ability to remove heat from the air in your home in a certain amount of time. The unit of measure for cooling capacity is tonnage. Typically, a TXV is designed to work for systems that fall within certain tonnage ranges. That means you can find:

  • A TXV for 1.5 to 2 ton systems
  • A TXV for 2 to 3 ton systems
  • A TXV for 3.5 to 5 ton systems

Refrigerant Type

You may have heard that the R22 refrigerant is being phased out in favor of the more environmentally friendly R410-A. However, many homeowners still have legacy air conditioning systems that utilize R22, so you can find a TXV that is compatible with either one of these refrigerant types. When you are choosing between products, make sure that the TXV you buy is optimized for the refrigerant that your system utilizes.

Cost Considerations

If you’re buying a standalone TXV for an existing system, you can expect to spend around $100, or a little less. When considering the cost of a TXV, you may also want to factor in the warranty, which can add value the product. At the same time, you should also recognize that field installation presents a possible cost -- unless you’re a home-builder or a do-it-yourselfer, in which case installation may be less of a concern.

Currently, National Air Warehouse offers a Goodman TXV (of any size) for $91.69, with free shipping. This product also comes with a one-year warranty. Contact us today to learn more about this TXV and all of our other products!

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