Hey guys, I'm Roger Wakefield, LEED AP, The Expert Plumber and coming to you to talk
to you today about tankless water heaters. Do tankless water heaters really
have an unlimited supply of water? The question is yes and no. For your average
daily use a tankless water heater is gonna be phenomenal. You're not gonna
have problems, if you get in the shower after somebody else you're not gonna
have an issue, there's gonna be plenty of hot water there. Different than a
tankless water heater or a tank type water heater because a tank type water heater, say
you've got a 50 gallon gas water heater you can actually get about 65 - 70 gallons
of water out of it during that first hour, but if you've got four or five
people taking showers or you've got somebody doing laundry and you've got
somebody cleaning the kitchen or want to use in the jacuzzi tub and the other
three or four taking showers there's probably not gonna be enough hot water
for that. Now can you just turn on the tankless water heater and let it run
forever and it's gonna produce hot water forever?
No, you're eventually going to wear that system out and you're gonna waste a lot
of hot water. The good thing about tankless water heaters is their on
demand, so when you turn on hot water it makes that much water. It starts heating
water immediately, as soon as you shut it off and you're done that's when it turns
it off so you're not paying to keep water hot all day that you're not using.
So tankless water heaters will make as much water as you really need and that's
a good way to look at it. The only issues that you can have on maybe not getting
enough hot water on the tankless system is if you don't have a high enough flow
volume on your water heater and you're trying to get a ton of hot water all at
one time, it is gonna restrict it and it is gonna slow it down depending on what
delta you're trying to get. Meaning where we're at our inlet water temperature is
about 70 degrees. If you're trying to get 140 degrees out and you're trying to
heat that water 70 degrees it's gonna slow the flow down quite a bit
in order to get it that hot. So what you're gonna need there is you're gonna
need two water heaters and you're gonna need them pipe in series not parallel
because parallel is still going to keep that flow down. Guys there's a lot of
things to look at when you're looking at a tank water - tankless water heater but
things I like most about tankless water heater is the life expectancy of them. If
you take good care of them they'll last year twenty years or so. Taking care of
them is really not that hard to do it's something that you can do or it's
something that you could call us to do. Guys tankless water heaters are very
beneficial just make sure that you go through and you look at how much water
you could possibly use at one time. That is the only thing that I see about a
tankless water heater that could slow it down, would be the flow restriction but
like I said while ago if you'll take two of them and pipe them in series you can
alleviate that problem. You can fill up a jacuzzi tub real quick, you can take
multiple showers, you can do laundry and you can do the dishes all at one time.
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doing it and we're hoping that you get something out of it. My name is Roger
Wakefield with Texas Green Plumbing, saving you money one drop at a time.