Help your AC with mist???

New to me just had a client ask me about this .
Living in Canada we only use our Air Conditioners about 8 weeks a year …
what do you think?.. Roy


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Personally I don’t want that much moisture blowing around If I did that is what a swamp cooler is for Water destroys every thing it contacts over time wood metal what ever, good to hitch a horse under after riding cain’t think of any thing else I would want to use it for pardner;-):wink:

Thanks that was my thoughts ,never heard of this before … Roy

In your hottest day in July (83F) you could get a 9 degree drop in temp (but it would be saturated with water).

The body needs to evaporate perspiration to cool the best. Though the air is cooler, it will not allow sweat to evaporate.

Works great in AZ though! Not in Brighton, ON.

Not needed in good old Canada, In 23 years never seen a problem unless it had a dirty coil.

Thanks all ,this is all new to me . I will tell my client No advantage that I can see and could cause some concerns … NACHI where info is shared … Roy

I have seen people in my area use a portable sprinkler to achieve the same effect.

It can be a good device for the outdoors. I have experienced them at ice cream shops up in New England and they take the edge off in the summer (which ever day that is)!

But keep them away from the building.

Roy. I looked up weather in August and couldn’t find a day over 70F!! :wink:

Dale Duffy can tell you all about the fun they have with swamp coolers.

30% off cooling costs by keeping the condensing unit cool… ??

Interesting idea, wouldn’t there be an impact to components constantly being exposed to water (hard or otherwise)? Another way to look at, would the damage to the unit be offset by the savings :slight_smile: Meaning, if I suddenly got 60 mpg in my truck, would I care if the tires only lasted half as long.

My summer electric bill can be as much as $400 and a new condensing unit installed by a sub for $2400… so, maybe there’s something to it?

Looks like I found a different Chart then you did ,This year every day was over 70°F. Month average was ( 77.5 °F )
Trenton is 10 miles from my home
My Chart is different then Yours … Roy

We in Canada use C not F for temp
Some conversions are
21°C = 70°F
24°C = 75°F
27°C = 80°F
25.3°C average day time was 77.5 °F
[FONT=Times New Roman][size=3]

ONTARIO Latitude: 44°07’00.000" NLongitude: 77°32’00.000" WElevation: 86.30 mClimate ID: 6158875 WMO ID: 71621 TC ID: YTR Previous Day Previous Month JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctober 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 Next Month
Daily Data Report for August 2011D
yMax Temp
°C Temp
°C Temp
°C Deg Days
°C Deg Days
°C Rain
mm Snow
cm Precip
mm on Grnd
cm of Max Gust
10’s degSpd of Max Gust
km/h 3.766.540.30.098.3* Avg25.315.520.4* Xtrm29.511.5 2757Summary, average and extreme values are based on the data above.01†29.519.424.50.06.5MM0.0 324102†29.118.623.90.05.9MM0.0 303203†21.716.919.30.01.3MM23.5 <3104†28.315.822.10.04.1MM0.0 <3105†27.515.521.50.03.5MM0.0 <3106†27.418.422.90.04.9MMT <3107†25.720.623.20.05.2MM1.0 <3108 09†20.915. <3110†24.7E14.9E19.8E1.8EMM2.5E MM11 12†25.511.718. <3113†28.215.722.00.04.0T0.0T <3114†25.015.820.40.02.433.50.033.5 <3115† 13916†28.915.322.10.04.1MM0.0 <3117†26.113.519.80.01.8MM0.0 <3118†27.318.723.00.05.0MM0.0 243219†26.314.620.50.02.5MM0.0 <3120†27.714.821.30.03.3MM0.0 <3121†22.813.618.20.00.2MM7.0 334622†22.612.617.60.40.0MM0.0 324123†23.413. <3124†24.719. 275725 26†22.613.918.30.00.3MM0.0 <3127 28† <3129†21.511.516.51.50.0MM0.0 <3130 31†24.714.519.60.01.6MM0.0 <31


I didn’t have my Canadian Translator with me! Sorry! :wink:

I didn’t mean 70, I meant 70’s.

That misty thing will work as proclaimed.

Just don’t run it below 85 degrees F.
(I’m starting my own NACHI Old-Wives-Tale). In other words I am puling out an approximate temp. because what it actually is doesn’t matter at this point.

Water cooled devices should be controlled with refrigerant head pressure, not air flow.

When you lower the head pressure, the back pressure goes down.

Back pressure normally runs at 70 psig which is 40 degrees F. (not too far away from freezing).

Lower the head. The back goes below freezing and you have a frozen evaporator coil.

The metering device also requires a specific pressure differential to operate efficiently. As most residential metering devices are restrictors and do not change with load, if you do not have pressure, you starve the evaporator and pressure and temperature falls.

All equipment is designed for a maximum OA temperature for it’s zone (See ASHRAE for your design load temps). This thing should only be operated when it is at/above those design temps (that is when the equipment is undersized for conditions).

Thanks David these discussions help many to learn … All the best… Roy