If you've ever looked over the dial on your tank and wondered about the vac setting on water heater units, you're basically looking in the "vacation mode" for the home's plumbing. It's one associated with those features that most of us walk past every solitary day without the second thought, yet it's actually a pretty clever method to save a few bucks and keep your house safe whilst you're away. Many people just keep their water heater cranking at 120 or 140 degrees year-round, even when they're hanging out on a beach 3 states away. Making use of that little "VAC" notch is the much smarter move.
What does the VAC setting really do?
The word "VAC" is just brief for vacation, plus its job is pretty straightforward. When you flip your heater over to this setting, you're informing the mind of the unit—whether it's a mechanical gas valve or an electronic control board—to prevent keeping the water at a temperatures that's ready intended for a shower. Rather of keeping that will big 40- or 50-gallon tank at a scalding temperature, the vac setting on water heater storage containers usually drops the internal temperature down to approximately 50 and 70 degrees F.
It's just enough heat in order to ensure that the particular water doesn't freeze out if you live within a cold environment, but it's reduced enough that the burning or heating components aren't kicking on every handful of hours to maintain a high heat. It basically puts the appliance within a "pilot-only" or even "low-energy" state. You're still keeping the system active, but you aren't paying out to heat water that nobody will probably use for a week.
Why you should trouble using it
You may be thinking, "Is it truly worth the thirty seconds it takes to examine into the garage area or the basement to turn a dial? " For the weekend trip, maybe not. But when you're heading out for a 7 days or two, the savings can really add up. Water heating units are often the second-biggest energy hogs within a typical house, right behind the HVAC system. They constantly lose high temperature through the walls of the tank—something advantages call "standby heat loss"—which means the particular heater has in order to fire up periodically just to remain hot, even in case you haven't handled a faucet.
By using the particular vac setting on water heater systems, you're drastically reducing that standby reduction. Plus, it's the bit of a safety win. While modern water heating units are incredibly secure, there's always a tiny, tiny chance of a pressure buildup or a leak. Keeping the program at a reduced temperature reduces the overall stress on the particular tank and the pipes while you aren't home to keep an eye on things.
Finding the setting on the latest models of
Not every water heater looks exactly the same, therefore finding the vac setting on water heater units can vary a bit based on what you've got in your utility closet.
Gas Water Heaters
If you have a standard gas water heater, you'll generally see a huge plastic dial close to the bottom, right where the gas line enters the unit. You'll see "On, " "Off, " "Pilot, " and after that usually a setting labeled "VAC" or even "Vacation. " It's often right following to the "Pilot" position. To alter it, you generally just turn the particular knob until the pointer aligns with the VAC mark. Want to know the best part? A person don't have to relight the pilot lighting when you get back; the flame remains lit, but the particular main burner simply stays off.
Electric Water Heating units
Electric models really are a bit various. Older electric reservoirs may not even possess a vacation setting; they often simply have internal thermostats hidden behind screw on panels. Don't go poking around in individuals unless you know what you're doing, due to the fact there's high-voltage electricity in there. However, more recent "smart" electric heating units or hybrid heat pump models generally have an electronic display. You can often just press the "Mode" button till "Vacation" pops up. A few of the really fancy ones even allow you tell the heater which time you'll be back therefore it can begin heating the water up before you walk through the front side door.
The "Wait Time" when you get back house
Here is usually the one catch that catches individuals off guard: if you get home from a long vacation, you won't have got hot water immediately. If you've acquired the vac setting on water heater mode for ten days, that water is going to be cold.
Once you drop your bags, you'll need to head down to the heater and switch the dial back again to your normal setting (usually "A" or "Hot, " which is in relation to 120 degrees). Based on whether a person have a fuel or electric unit, it'll take any where from 30 minutes in order to an hour plus a half to obtain that tank regress to something easier to a comfy temperature. I've made concentrate on of jumping within the shower five minutes after obtaining home through the airport, only to get a face full associated with 60-degree water. It's an error you just make once!
A quick note on safety and bacteria
There's a bit of a debate within the plumbing world about whether the vac setting on water heater tanks is "too cold. " Some folks worry about Legionella bacteria, which loves to develop in lukewarm water. This is the reason why most pros recommend that if you've been gone with regard to a really lengthy time—like a 30 days or more—you should turn the heater support to its normal high setting and let it sit there intended for a couple of hours before you begin running the taps.
When the water is back up to 120-140 degrees, it'll kill off anything that tried to fixed up camp whilst you were eliminated. It's also a good option to flush your faucets for a few minutes once the water is hot again. This clears out any stagnant water that's been sitting within the pipes throughout the house.
Exactly why not just change the heater away completely?
It's tempting to simply shut the entire thing down in order to save even even more money, but that's usually a poor call. If you possess a gas heater, turning it "Off" means the preliminary light goes out there. When you go back home, you'll have to go through the whole process of relighting it, which can be a pain if the igniter is finicky.
More importantly, if it's winter plus you live somewhere where it stalls, turning the heater completely off could lead to a burst container or frozen pipes if your home's heating system fails. The vac setting on water heater models keeps the water just warm plenty of to prevent it through turning into a stop of ice. It's simply the "safe" way to be cheap with your utilities.
Is it well worth the effort?
At the end of the day, making use of the vac setting on water heater tanks is a personal choice. When you're only going to run away regarding a night or two, the energy you save is definitely probably measured in pennies, and it's likely not worthy of the hassle associated with waiting for the particular water to warm support when a person return.
However, if you're a "snowbird" who leaves for that wintertime, or if you're taking a two-week international vacation, it's a total no-brainer. It saves energy, it reduces use and tear on your tank, plus it's one much less thing to worry about. Make absolutely certain you remember where the dial is so you don't have to go hunting intended for it at nighttime whenever you're tired through traveling. It's a simple habit that's definitely worth beginning.