What's new

The Original O'l Farts Club.

oldmaninbc

Well-known member
420club
JMHO and my POV
I personally would think twice because from what I am understanding they need service because they get buildups from water minerals .
I know regular hw htrs collect shit too and need to be drained.
Usually if one is installing a hw htr it pays to change that drain valve to a brass one which make it easier to flush out .
I have seen them in electric and gas but never both in the same unit.
Got to be a big feed electric wise
I think they are not cheap
Insurance companies don't want to insure your home properly if your electric tank is older than 10 years. Last year I drained and replaced, temp control and elements, then found out my tank was 10 years old. I also found out something that I didn't know. Your bottom element will not turn on until the top element has reached the desired temp. So every time I used the meter to test, it was showing no power going to the lower element. I thought it was all bad and replaced temp control and element. Then found what I know now, the bottom element only comes on after the top has reached the set temp.
 

Gray Wolf

A Posse ad Esse. From Possibility to realization.
Mentor
ICMag Donor
Veteran
Nothing is more beautiful to me than a woman
Some more so than others. Premium points for fine minds and pleasing personalities.
My low water temp is pretty much why I ruled them out.

Another thing I found with some units was the limit on water temp settings to 140 degrees. I like My hot water between 145 and 150. Imagine the BTU's it takes to heat water from 55 to 150 in the space space of a tankless unit.

The higher your water source temp the more economical they become.
One cubic inch of water weighs 0.0361lbs and there are 231 cubic inches in a gallon, therefore a gallon weighs 8.3391lb.

It takes one (1) BTU to heat one (1) lb of water one (1)-degree Fahrenheit. The btu's required are therefore directly proportional to the temperature rise and easy to calculate.

ASSuming 55F incoming water and 180F desired temperature, the Delta Temperature is (180F -55F) =125F

(8.3391lb X 1 btu X 125 degrees Delta T) =667.4 btu

A tankless water heater is just a flash boiler that heats a stream of water as it passes through a heat exchanger so that no storage tank is required.

If the flow through it is ten (10) gallons per minute, then : (10 gal X 667 btu's) = 6670 btu's/minute to heat it to 180F.
 

Boo

Cabana’s bitch
Veteran
Some more so than others. Premium points for fine minds and pleasing personalities.

One cubic inch of water weighs 0.0361lbs and there are 231 cubic inches in a gallon, therefore a gallon weighs 8.3391lb.

It takes one (1) BTU to heat one (1) lb of water one (1)-degree Fahrenheit. The btu's required are therefore directly proportional to the temperature rise and easy to calculate.

ASSuming 55F incoming water and 180F desired temperature, the Delta Temperature is (180F -55F) =125F

(8.3391lb X 1 btu X 125 degrees Delta T) =667.4 btu

A tankless water heater is just a flash boiler that heats a stream of water as it passes through a heat exchanger so that no storage tank is required.

If the flow through it is ten (10) gallons per minute, then : (10 gal X 667 btu's) = 6670 btu's/minute to heat it to 180F.
Some of the technical stuff that comes out of your mouth JD just blows my mind. And to think you’re a stoner…🤣
 

dogzter

Drapetomaniac
Some more so than others. Premium points for fine minds and pleasing personalities.

One cubic inch of water weighs 0.0361lbs and there are 231 cubic inches in a gallon, therefore a gallon weighs 8.3391lb.

It takes one (1) BTU to heat one (1) lb of water one (1)-degree Fahrenheit. The btu's required are therefore directly proportional to the temperature rise and easy to calculate.

ASSuming 55F incoming water and 180F desired temperature, the Delta Temperature is (180F -55F) =125F

(8.3391lb X 1 btu X 125 degrees Delta T) =667.4 btu

A tankless water heater is just a flash boiler that heats a stream of water as it passes through a heat exchanger so that no storage tank is required.

If the flow through it is ten (10) gallons per minute, then : (10 gal X 667 btu's) = 6670 btu's/minute to heat it to 180F.
What are you wearing right now?
😁
Bet he says that shit in a deep,slow drawl.
 

Dime

Well-known member
Insurance companies don't want to insure your home properly if your electric tank is older than 10 years. Last year I drained and replaced, temp control and elements, then found out my tank was 10 years old. I also found out something that I didn't know. Your bottom element will not turn on until the top element has reached the desired temp. So every time I used the meter to test, it was showing no power going to the lower element. I thought it was all bad and replaced temp control and element. Then found what I know now, the bottom element only comes on after the top has reached the set temp.
I rent mine from Reliance now,$35 a month and it's their hassle and insurance is happy.
 

Gray Wolf

A Posse ad Esse. From Possibility to realization.
Mentor
ICMag Donor
Veteran
Some of the technical stuff that comes out of your mouth JD just blows my mind. And to think you’re a stoner…🤣
I created some of best inventions stoned but have to be straight to so much serious math.

Fortunately figuring heat rise is pretty straightforward and I've done it so many times over the years that I keep the important numbers in my head.

Here is a link to an article that I wrote on Cannabis extraction and processing thermodynamics:

 

Latest posts

Latest posts

Top