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#4478959 - 08/04/17 11:31 AM Saving on your home a/c?
OneEyeJack Offline


Registered: 09/14/10
Posts: 7475
Loc: S California
Anyone doing something like this?


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#4478968 - 08/04/17 11:38 AM Re: Saving on your home a/c? [Re: OneEyeJack]
440Magnum Offline


Registered: 02/01/09
Posts: 8754
Loc: Texas
This idea pops up like clockwork every so often. Back in the 70s, Rheem had a residential AC model with water spray built in from the factory.

Problem is that in so many areas of the country, if you do this your condensing coil will wind up being a solid block of lime scale within a few weeks and efficiency will go DOWN. Also... water bills aren't trivial.
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#4478970 - 08/04/17 11:44 AM Re: Saving on your home a/c? [Re: 440Magnum]
AirgunSavant Offline


Registered: 07/22/15
Posts: 3772
Loc: MD
Originally Posted By: 440Magnum
This idea pops up like clockwork every so often. Back in the 70s, Rheem had a residential AC model with water spray built in from the factory.

Problem is that in so many areas of the country, if you do this your condensing coil will wind up being a solid block of lime scale within a few weeks and efficiency will go DOWN. Also... water bills aren't trivial.

I guess with a well it ain't no big deal.

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#4478971 - 08/04/17 11:47 AM Re: Saving on your home a/c? [Re: OneEyeJack]
Kestas Offline



Registered: 06/04/02
Posts: 12325
Loc: The Motor City
8.5 minutes just to tell us to spray water on the outside of the condenser?

I've done something like that on super hot days. It also helps to keep the head pressures down in the a/c unit. When watering plants on hot days, I'll sometimes spray water on the sunny side of the house.

I've also read articles where they are thinking of using water to cool roofs in Arizona, even though water the area is scarce.

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#4478972 - 08/04/17 11:50 AM Re: Saving on your home a/c? [Re: OneEyeJack]
Nick1994 Offline


Registered: 02/19/13
Posts: 10097
Loc: Phoenix, AZ
An evaporative air conditioner. Interesting.
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2015 Hyundai Sonata 2.4L 79k PU 5w30 & OEM
2000 Toyota Camry 2.2L 228k M1 AFE 0w30 & Wix
1996 Jeep Cherokee 4.0L 146k M1 HM 10w40 & Fram Ultra

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#4478982 - 08/04/17 12:05 PM Re: Saving on your home a/c? [Re: OneEyeJack]
dnewton3 Offline



Registered: 05/14/07
Posts: 7389
Loc: Indianapolis, IN
Yes -
I let it happen every time it rains.


Seriously, how much does one spend in water to save on electricity?


Some folks just have to re-invent the wheel with something octagonal ... Just cuz ....
_________________________
The act of preventative maintenance, in and of itself, is FAR MORE important than brand/grade/base choices among lubes and filters.
- under maintaining something is akin to abuse/neglect; that can kill equipment by shortening the lifespan
- over maintaining something has never been proven to be anything but a waste of time and money

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#4478994 - 08/04/17 12:22 PM Re: Saving on your home a/c? [Re: dnewton3]
Wolf359 Offline


Registered: 04/27/12
Posts: 4742
Loc: MA
Originally Posted By: dnewton3
Yes -
I let it happen every time it rains.


Seriously, how much does one spend in water to save on electricity?


Some folks just have to re-invent the wheel with something octagonal ... Just cuz ....



Guy claims a gallon a day which isn't much. Around here, 1000 gallons is $12 in water and sewer charges. So about $4 in water if you run it year round, but it's only hot around here for about 3-4 months so more like under $1 a year.

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#4478997 - 08/04/17 12:33 PM Re: Saving on your home a/c? [Re: OneEyeJack]
rshaw125 Offline


Registered: 08/18/04
Posts: 3258
Loc: Raleigh ,NC CSA
This comes with a water filter, right?
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#4479003 - 08/04/17 12:38 PM Re: Saving on your home a/c? [Re: Wolf359]
umungus1122 Offline


Registered: 02/12/08
Posts: 1058
Loc: PA
Originally Posted By: Wolf359
Originally Posted By: dnewton3
Yes -
I let it happen every time it rains.


Seriously, how much does one spend in water to save on electricity?


Some folks just have to re-invent the wheel with something octagonal ... Just cuz ....



Guy claims a gallon a day which isn't much. Around here, 1000 gallons is $12 in water and sewer charges. So about $4 in water if you run it year round, but it's only hot around here for about 3-4 months so more like under $1 a year.
+1


Edited by umungus1122 (08/04/17 12:38 PM)
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#4479004 - 08/04/17 12:41 PM Re: Saving on your home a/c? [Re: OneEyeJack]
Cujet Offline


Registered: 02/15/03
Posts: 7144
Loc: Jupiter, Florida
I have a single, 5 ton, dual compressor, American Standard high efficiency unit.

If I spray water on the condenser, such as when I'm cleaning it, the house gets cold very rapidly. Also if it's raining out, it cools the house much more quickly.

Even so, my electric bills are very reasonable in mid summer. The high efficiency AC unit, coupled with an efficient house setup has paid for itself over the years. And the dual compressor unit does reduce the time each one runs. So the system lifespan is quite good. I don't track how long each compressor runs, but it seems about 50-50. With the 5 ton comp running more in the summer and the 2.5 ton running more off season.
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#4479029 - 08/04/17 01:31 PM Re: Saving on your home a/c? [Re: OneEyeJack]
OneEyeJack Offline


Registered: 09/14/10
Posts: 7475
Loc: S California
The system in the video comes with a filter.

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#4479066 - 08/04/17 02:42 PM Re: Saving on your home a/c? [Re: OneEyeJack]
rshaw125 Offline


Registered: 08/18/04
Posts: 3258
Loc: Raleigh ,NC CSA
It would be very informative if they could show actual electric consumption declining as the water is turned on. Some sort of meter attachment?
Also if they could show how a 12 seer unit becomes a 13 seer unit? As an example.
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2016 Ford Edge 2.0
2002 Taurus Vulcan SOLD
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#4479071 - 08/04/17 02:45 PM Re: Saving on your home a/c? [Re: rshaw125]
440Magnum Offline


Registered: 02/01/09
Posts: 8754
Loc: Texas
Originally Posted By: rshaw125
It would be very informative if they could show actual electric consumption declining as the water is turned on. Some sort of meter attachment?
Also if they could show how a 12 seer unit becomes a 13 seer unit? As an example.


You can watch it happen with a clamp-on inductive ammeter. The compressor current drops pretty much as soon as you hit the coils with a spray of water. The effect is real... what I believe makes it a non-starter is the rapid accumulation of hard water scale, corrosion of the condensor coil, and the cost of feeding it water. So you spend a little less on electricity and wind up replacing your condensing unit 3x as often. Not a win.

Plus there's NO WAY that system only uses "about a gallon a day." Look at the water flow rate from just ONE of the 4 misters, its closer to a gallon an hour per mister. So I'm thinking more like 40-50 gallons per day or even more. And that tiny little filter is going to soften that much water to prevent scale? No way.
_________________________
'66 Dodge Polara & '69 Dodge Coronet R/T both 440/727
'08 Ram 1500 4.7/545RFE
'12 Challenger SRT8 392/6-speed
'99 XJ 4x4 4.0/AX15, '14 WK2 4x4 3.6/8HP

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#4479123 - 08/04/17 04:05 PM Re: Saving on your home a/c? [Re: OneEyeJack]
DBMaster Offline


Registered: 09/18/12
Posts: 5322
Loc: DFW
Originally Posted By: OneEyeJack
The system in the video comes with a filter.


I got curious and checked the web site. On the site it says the filter is good for three months.

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#4479139 - 08/04/17 04:28 PM Re: Saving on your home a/c? [Re: OneEyeJack]
OneEyeJack Offline


Registered: 09/14/10
Posts: 7475
Loc: S California
Would a sun shade of some kind over the unit help at all?

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