20121116

$5 a month to Run a Flash Hot Water Heater

We just received our Natural Gas bill for mid-October through mid-November. We had installed a inexpensive flash hot water heater for our house at the beginning of this billing cycle and it appears to have cost us $5 more than our usual bill. It might be important to note that we only used natural gas to heat the house two times during that window and we had a four day period where there were 15 guests staying with us. Regardless of the details I'm thrilled to see we can have hot water for less than $5 a month.

8 comments:

Carlos said...

If you have a place with all day long sunshine, you can install a solar water heater to work in conjunction with your instant on hot water heater. Batch heaters are the simplest. Solar hot water heating is one of the cheapest and easiest ways to use solar energy. You'll still need an instant on water heater for cloudless days and winter nights.

Mikey Sklar said...

We have that batch heater that we just need to find a suitable location to mount. I like the idea of a pre-heater that I can run glycol through. It's a good thing we got everything for free, because there is no way that $5 a month in hot water was ever going to pay for a new hot water system.

dave said...

I have a solar hot water heater at my place in Arizona. For roughly 11 months of the year, I don't even supply power to the heating coils. I do have to supply power to the little pump that moves antifreeze up to the collector. I keep the water temp at 135 and it far exceeds my need for hot water.

I did it this way, rather than a flash heater, because I don't have gas piped out to where I am. Propane versions mean consumption of gas at $4 a gallon and trucking back and forth from town. Electric versions will put you in the poor house with 'demand billing'.

Carlos said...

Mikey, you've got it backwards. How does the solar hotwater system cost divided by the cost to heat water. You spent $5 this month in gas but that figure is variable. I figured out mine when I was in AZ to be about $8 using an electric water heater with a timer no less heating water roughly 60 hours/week. A full time water heater would likely cost you $20/gas or electric easy. So the figure you're actually saving is $15/month by switching to a solar/instant on installation. Remember that's at today's energy costs. Energy costs are rising with greater demand, both gas and electric. I can see that savings figure rising to $25-$30/month within 10 years. That old saying of 'pay a little now or a lot later' comes to mind.

Mikey Sklar said...

Carlos,

You are a right that a flash heater is well worth the investment. I had meant to say that our household hot water usage was so minimal that I would not be able to justify the cost of a commercial solar hot water heating equipment.

We were gifted some solar hot water gear which we still need to install as a pre-heater.

Mikey Sklar said...

Carlos,

You are a right that a flash heater is well worth the investment. I had meant to say that our household hot water usage was so minimal that I would not be able to justify the cost of a commercial solar hot water heating equipment.

We were gifted some solar hot water gear which we still need to install as a pre-heater.

Yarrow Mackenzie said...

Hey Guys, What kind of water heater did you end up getting. I'm having to replace one now and I know you are immaculate researchers.

Mikey Sklar said...

@Yarrow:

Marey Tankless Water Heater Natural Gas 2 GPM Hot Water with No Electricity Needed.

We bought it through Amazon and it came to $159.99 with shipping.