How to Size Your Tankless Water Heater Properly 

He really means it when he says, "even if you don't buy from us, call me if you need help!" I even called him about sizing a natural gas outside unit for metro Atlanta, and he is in Miami! I was going to oversize the unit and buy a 9.5 gpm unit when I only need an 8.4 gpm, and as he said, "that's plenty for a 2 full bath 4 bedroom home, unless someone wants to draw a bath on the coldest night of the winter." I am SO appreciative of your help and guidance! Many thanks to this gentleman who also took my call at 7pm on a Monday night!

Guys legit! Just called from Norfolk,VA! Gave me all the info with no flack at all! Really was surprised, businesses like them are extremely rare to come by!

I just called Miami Water Heater and spoke to a gentleman who was unbelievably knowledgeable and helpful. I told him I was calling from Virginia Beach, and he still treated me like one of his customers. He stayed on the phone for about 20 minutes graciously answering all my questions and concerns. Unbelievable in this world! When I commended him for how well he was treating me, he said that's how Miami Water Heater has stayed in business for so long - great customer service. This company is a credit to their profession. I would trust Miami Water Heater for any job if I lived in their region. Thank you again for being such great, polite, knowledgeable experts.

Fuckin love this guy!!! True legend! Coached me up, right after I watched the video while putting my 4 yr old twins to sleep, the struggle of a dad! This guy is amazing !!!

I too, called them. All my questions were answered. Highly recommend MWH.

I live in south Texas, and the hard water is killing our water heater. I plan to replace it with a tankless water heater, and this video has been so much more helpful than all the crap out there.

CARLOS is the man. super helpful. honest and very knowledgeable. thanks for the help, carlos

Thank you for this video! Very kind to be so helpful, you've really helped me out in California...time for a new water heater and this time we are going tankless! God Bless you!

You’re the best. Wishing you the best. You’re honest and that says a lot about you . Thank you 🙏 God bless you

From Michigan. Ironically you sized the exact specs for my home. Will use your charts and my temps to verify. Thank you so much for the information.

Excellent info about temperature in/ out. I appreciated and I will be calling you guys. 👍👍👍👍👏👏👏👏

This was such an amazing explanation. Thank you for taking the time to make this video! 😀

Great info, thank you.

Thank you!

He really means it, if your new like I am and need help give him a call he will gladly help. Coming from me. A person from Texas.

This company is genius. This is how you build a brand and generate a ton of Google juice. You should be taking notes if you are a small business owner.

You do fine explaining. Just a lit bit of a fast talker. Slow down and let us absorb. Stay safe. Thank you.

Thank you for information ur truly a money saver.i have 2 bathroom wth a large jacuzzi bathtub what do I need? Plus kitchen and washing machine

Good video, good information, and I clicked on the link.......Great prices!!! Just wondering, I'm retiring and moving to Michigan and will be installing a soaker tub. Is it worth it to consider a tankless, should I get two, or should I go with a traditional tank water heater? Thanks for the video and info.

It woul'da helped if you provided the links. I went to the website and gave up looking for that information.

I wish you were here in KY!

Thanks, great info! Does it help to know what's on site at the moment? I have a 40 gallon tank, 4,500 W and 240 V. One double pole 30 amps. Central Florida, two people, two bathrooms house, but only one shower in use, so I think an 8 or 11 will be good? Is this a whole house unit? What are the requirements? Will I need to change wires, etc? Do you happen to work in Central FL, or ship here? Thanks for any help, I've been taking cold showers for a week now, lol! Still trying to understand. Also, how about condensing and non-condensing units?🥴

So if I'm building a b&b in Pennsylvania and the main house will have 9 showers with 6 heads each (though I will I inform guests to only use 2 spray options at a time, max 4 heads), how many Navien propane 199k btu/h would I need? Or would it be better for water pressure to break the building down into zones and have one tankless per zone? We will have a 2" line from the street at 128psi and then drop it to 75psi.

As far as I can see, there is no real downside to the higher output units. The minimum flow rates are usually the same. They are packaged in the same box. The difference in price of the heater itself is nearly negligible compared to the whole project.

I live in south florida. Do we have to calculate how many showers will be on at the same time? I have a two bathroom house, planing on installing an outdoor shower in the near future and a hook up to a camper trailer. So that will possibly be a total of 4 showers. Ive installed a 27kw ecosmart. Did i go too big? I mean, when will all the showers be on at the same time? Will i same some money on energy if i go a size smaller? Second question: now some of my lights flicker when the water heater goes on, how do i fix that?

What about using dishwasher or washing machine at the same time?

Can u tell me my water is so high in calcium its burnt up 2 heating elements a yr will a tankless be a bad idea?

do you install water heaters? or just sell them (this is for a new build)

gas is good electrical consider total amps = service change + $ 3500.00 100 + amps/alone try cooking @ same time w/ heater faucet and micro

Hilarious…

Wow! Great video! Can you answer this case scenario question: If I buy an 8-unit rental apartment that requires a minimum 80-GPM cold water (40-degree) supply from the meter for 36-Fixtures (using the UPC Chapter 6 Hunter's Curve Appendix math), how many GPM will a 300-GPH tank heater provide each of the hot water fixtures (e.g., each of the 8 non-water-conservation tub-spouts via their 10-GPM maximum flow rate Moen spec mixing valve)? Is 300-GPH limited to 5-GPM (not 10-GPM) maximum h/w flow rate per 1-hour (300/60) -- (e.g., 8-units filliing 60-gallon tubs with 30-gallons of h/w at the same time = 240 gallons @ a 6-minute 5-GPM fill rate)? Would I need a 600-GPH tank to provide the 8-Units their 10-GPM maximum Moen spec mixing valve h/w 3-minute fill rate? Yes, I know Hunter's Curve claims the odds of all 8-fixtures (or all h/w fixtures) being used a the same time is a 1% peak load chance. But I like to plan for worse case scenarios:)

1 shower, avg.temp 40 to 50, what do you recommend?