Look for a Thermostatic Expansion Valve When Upgrading Your Home’s A/C
If you’re looking to replace your A/C, keep in mind that it uses a substantial portion of home energy costs. Units with a thermostatic expansion valve (TXV or TEV) perform better in a variety of weather.
This valve helps to control energy costs because it increases the unit’s efficiency. A TXV is a small, brass mechanism that regulates the amount of refrigerant moving through the evaporator coil of your A/C.
How it works
Just as the thermostat in your car opens to allow coolant to flow when the engine heats up, the thermostatic expansion valve makes more refrigerant available to the A/C’s indoor coils when it’s needed the most. In contrast, when the air conditioner doesn’t need to run at its highest capacity, the TXV reduces the flow of refrigerant. This switching between higher and lower levels of refrigerant allows the A/C to quickly adjust to the constantly changing cooling load. The cooling load is the amount of heat at any specific time that the air conditioner must remove to keep your home at a steady and comfortable temperature.
Throughout a typical day, the cooling load changes. It may increase during the warmest part of day, while you run appliances like the stove or dryer, and even when you use a lot of lighting. In the early morning hours, the cooling load may be less.
The best option is to purchase an A/C unit with a factory-installed TXV, especially if you have a package air conditioner with the condenser and evaporator coils under the same cover. Units that do not have a TXV use a fixed orifice tube or capillary tube to meter refrigerant, somewhat less efficiently than a TXV. Circumventing these may void your warranty. For split systems where the coils are indoors, your A/C technician can install the TXV or a new set of indoor evaporator coils with one already attached.
For more information about whether a thermostatic expansion valve is right for your home cooling needs, contact the team at Apollo Home Heating, Cooling and Plumbing. We’re proud to offer expert customer service to greater Cincinnati 24 hours a day.
Image via Shutterstock.com
"Ernie & Mike did a superb job on my new furnace and A/C installation. Despite having more than a day’s work to do, they came in and stayed until the job was done. They were organized, efficient, and protected the rest of the house well. Got both furnace and A/C installed the same day. Ernie was courteous, informative, and clearly knew his job better than anyone I’ve encountered before. The units look so good guests now get The Tour of our new system. Apollo is clearly not a fly-by-night company. I would recommend them to anyone in need of a new furnace and/or A/C."
- Jerry A.
"I called Apollo because of a water leak I thought I had in our upstairs shower going into the kitchen. Robbie came and assured me everything was fine & looked at all the other plumbing. He ended up changing a few pipes for our washer & clearing a drain. He was very nice & knowledgeable with all my questions. I ended up signing up for the care plan & was very happy with my service."
- Cassandra B.
"The team at Apollo exceeded my expectations. As a business owner, my attention to the details and commitment to providing excellent service is high. From the sales rep. to the installation team, everyone’s performance was outstanding. For example, the installation team went to great lengths to protect our floors, placing floor runners and across the wood floors and up the stairs. They even were spot washing walls upon their departure. I highly recommend this company."
- Randy B.
"We scheduled an estimate AND a tune-up. We knew something was wrong with our furnace, but hoped we could make it through the rest of the season. Upon telling Bill what our furnace was doing, he warned us immediately what the possible outcome was going to be; a cracked heat exchanger. He watched the flames roll backward, tested carbon monoxide levels, which were so high they meter’s last reading was 5,600 before saying “high”. He immediately shut it down, tagged it, and explained that with levels that high and children in our home he wanted off right away. He continued his inspection and showed us via a camera that not only was it cracked in multiple places, but had holes all over it. He gave us a few options for repairing it; his knowledge as well as genuine concern was beneficial and refreshing. Luckily we also scheduled an estimator, Micah, to come too and we were able to get costs between repairing and replacing (with several options). We decided to replace with a much higher efficiency furnace and one sized properly to our home. Hands down, not only did they both provide us great service and knowledge, but without sounding dramatic, they may have saved our lives. This was our first time calling Apollo, but it won’t be our last."
- Sarah B.
"Apollo is an excellent company. I always receive great service. Alex A. was professional and friendly. He kept me informed during the process of checking my furnace and heat pump to make sure they were working properly. The company makes sure you are notified who is coming and when they are on the way. All my interactions with the company have been wonderful."
- Beverly S.