A portion of every Stream33, Breeze33, Craft33, and Bright33, purchase will be donated to your local Feeding America foodbank. Famous Supply will also make product donations to Habitat for Humanity. All to help make our dream of better local communities become a reality.Learn More
Stream33 offers high quality plumbing products priced right. From bathroom and kitchen products to pre-assembled installation kits and behind-the-wall products, you can count on Stream33 for convenience, quality and value.Learn More
Breeze33 offers high quality HVAC and air distribution products that are priced right. From mini split systems to room air conditioners and dehumidifiers and registers, you can count on Breeze33 for convenience, quality and value.Learn More
Craft33 offers high quality all-wood cabinetry that is priced right. Styles from transitional to modern and traditional, you can count on Craft33 cabinets to compliment your clients’ lifestyle and budget.Learn More
Bright33 offers high quality LED lighting products priced right. Discover indoor and outdoor LED lighting options from undercabinet to ceiling and vanity, you can trust Bright33 for convenience, quality and value.Learn More
Famous Supply has over 45,000 products in stock with experts to serve the residential, commercial, institutional & industrial markets.Learn More
Find solutions tailored to meet your professional plumbing, HVAC, and building company needs. We offer a wide range of programs and services to help customers streamline daily operations. See what Famous Supply can do for you.Learn More
With 31 Famous Supply locations in Ohio, western Pennsylvania, and West Virginia, your local Famous counter has everything you need to help you get your project done. Famous’ greatest asset is our quality Associates dedicated to serving you, our valued customer!
Setbacks are a thing of the past with our many delivery solutions. Famous Supply will deliver your order how, where, and when you need it. You can even track the status of your order in a few clicks with a Famous-Supply.com account.Learn More
With over 45,000 SKUs in stock, Famous Supply specialized in HVAC, plumbing, industrial, building products, and training. We sell into the residential, commercial and industrial market segments for new construction, replacement, repair, remodel, parts and service.Learn More
Famous Supply can help you with specifications, product options at various price points, design, layout, scheduling and coordination of your project from A to Z. We are your one-stop shop for HVAC, plumbing, cabinets, countertops, appliances, lighting, windows and doors.Learn More
April 7, 2021 Jeff Rosenblum
In most new high efficiency systems, a TXV is utilized as the metering device. That means superheat remains constant through its run cycle. Because of the constant superheat, the way to check and verify charge is by checking subcooling. Now, before we start please follow the manufacturer’s recommendations for charge. They may have a better or more efficient method for verifying charge. However, if you have to charge by subcooling then follow this guide.
So what is subcooling? It is the amount of heat removed from the refrigerant below its dew point. That means we keep cooling the refrigerant down below the point at which it condensed to a liquid. So why is that important? Well, it ensures that the refrigerant that flows to the metering device is liquid. A metering device cannot meter gas so a steady column of liquid is required.
Now that we know WHAT subcooling is, now let’s talk about how to measure it. Measuring subcooling is easy. Your gauges need to be hooked up to the system first. Read your high side (liquid line) pressure and convert it to temperature. Next measure your actual liquid line temperature. Subtract the two. There you have it. That is your current subcooling.
Knowing our actual subcooling is only part of the equation. We must know what our target subcooling is. Sometimes it is on the condenser’s tag. Other times you must follow the chart on the inside of the electrical box or in the install instructions. Once the target is found, you either add refrigerant to increase subcooling or remove refrigerant to decrease it.
By charging the system correctly, its capacity will be better, the dehumidification will be better and the homeowner will be happier with their comfort level.
22 Years Industry Experience
Cell (330) 962-2491