25 votes

Can I gain AC efficiency by spraying condensate water on the outdoor coils?

Clamp Power Meter Buy or borrow a clamp power-meter with a "kWh" feature, that is, the ability to perform an energy measurement. Not all clamp meters have this, e.g. a "True RMS" ...
P2000's user avatar
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17 votes
Accepted

Central Air condensate is pumped into a hole in the basement floor?

It's just a typical floor drain, and it's the ideal place to drain your dehumidifier. What you see is the water trap, which prevents sewer gas from escaping. It presumably connects to your sanitary ...
isherwood's user avatar
  • 135k
15 votes

Can I gain AC efficiency by spraying condensate water on the outdoor coils?

See other answer for how to test for actual efficiency gain, but you're basically cooling your output coil with a swamp cooler. In commercial settings it's called a free cooler. Water is either ...
K H's user avatar
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14 votes

Can I gain AC efficiency by spraying condensate water on the outdoor coils?

Disclaimer: This question is about Air Conditioners. The "You" discussed below is an air conditioner owner. This answer is not about heat pumps, which are a different class of equipment (...
Harper - Reinstate Monica's user avatar
10 votes

furnace condensate - system to collect and then drain periodically

Use a 5-gallon bucket and a standard sump pump. Put the sump pump into the bucket. Plumb it to drain into a convenient nearby drain, then run the condensate drain into the bucket. Once you've finally ...
FreeMan's user avatar
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9 votes

Can I gain AC efficiency by spraying condensate water on the outdoor coils?

If you gather and archive a local source of weather data, and operate the mist system on alternate days for a while, you should be able to gather a pretty good sense of the effect on power use, ...
Ecnerwal's user avatar
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9 votes

furnace condensate - system to collect and then drain periodically

If you want something that you can purchase off the shelf and install easily, a condensate pump like you have mentioned is probably the closest thing to what you want. If you want to try to build ...
Moshe Katz's user avatar
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5 votes

What kind of tubing should I use for draining condensate from a furnace / boiler?

TLDR: Plastic tubing seems the safest to use. You may be able to use certain types of metal in some cases, but acidity in the condensate can damage those materials. ICC model building code as an ...
StayOnTarget's user avatar
  • 5,495
5 votes

Central Air condensate is pumped into a hole in the basement floor?

This is a regular basement floor drain. there is a trap below the slab and that's why you see the water... that's a good sign. You should get a drain cover from your home store similar to the one ...
JACK's user avatar
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5 votes

furnace condensate - system to collect and then drain periodically

Although many of the suggestions are good, my concern with some of them using a regular sump pump type solution is that the water from a high efficiency furnace is somewhat acidic, and may cause ...
Milwrdfan's user avatar
  • 4,329
4 votes

Can I gain AC efficiency by spraying condensate water on the outdoor coils?

should this come out ahead since the water is "free" as condensate? Probably. Your logic is sound.. As others have mentioned, heat pumps are already quite efficient, and the most you can ...
Aaron's user avatar
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4 votes
Accepted

Should I reroute this drain tube inside my HE gas furnace?

I dug into the installation manual and the original configuration was incorrect. There are many different field conversions that can be made to the unit, some of which require repositioning the ...
bitsmack's user avatar
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4 votes
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What is this black bug with wings (pictured) coming out of my A/C condensate line floor drain, and how do I get rid of it?

Most likely termites. This is from Orkin:Termite swarmers can be black. Swarmers of the most common species, subterranean termites, have black bodies and clear, veined wings. Drywood swarmers are ...
RMDman's user avatar
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3 votes

Central Air condensate is pumped into a hole in the basement floor?

My first thought is it’s a floor drain until I notice it is close to the wall. This is a location for a clean out. Can you see standing water? If it is a clean out and not a floor drain it should not ...
Ed Beal's user avatar
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3 votes

Why is there a drain trap high on a wall above an air gap?

Assuming that it's a condensate line for rooftop HVAC equipment, the trap is required to prevent contamination of the habitable space by exhaust gases. It's also possible that an inducer fan could ...
isherwood's user avatar
  • 135k
3 votes

furnace condensate - system to collect and then drain periodically

There's a type of toilet cistern known as an "auto-cistern" that used to be commonly used for flushing urinals on a regular schedule (before better water saving alternatives came into common ...
Matt Ryan's user avatar
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3 votes
Accepted

Should water be dripping from my furnace condensate line onto the basement floor?

You have a new AC system. It's making cold air. It also is making the condensation it produces cold, which in turn creates more condensation in the drip line itself. Simple fix. Add a series of 90 ...
RMDman's user avatar
  • 27k
2 votes

Why is the second condensation drain on my central air unit active all of a sudden?

My FIL is an HVAC guy and he explained it to me when we installed a unit in a house I built. The first drip line is the main one. Mine had a float switch that would turn off the unit in case it was ...
El Duderino's user avatar
2 votes

Tankless water heater plumbing: neutralized condensate and pressure relief valve

Yes down the drain is good, the condensate is slightly acidic, usually in the 3-5 pH range. The neutralizer is supposed to, well, neutralize it back up to 7 pH but they do wear out or clog. Make sure ...
Joe Fala's user avatar
  • 6,354
2 votes

Just put calcium carbonate rocks in my condensate water pump or buy a whole condensate kit?

Your question doesn't clarify why you'd rather drop stones in the pump than to replace the stones in a filter cartridge. Regardless, the reaction between acidic water and caustic stone is going to ...
Carl Ernest's user avatar
2 votes

What is the dynamic head capacity of this pump?

You have selected the 230v model, I have the 120V model. The only standing water will be the 8' vertical to the ceiling and then a slight loop to the horizonal section. The horizonal should still ...
Programmer66's user avatar
  • 2,744
2 votes

What is this strange valve/trap from my boiler to condensate pump?

Actually, that cast iron piece is called an "air gap" which is used so contaminated water of a sewer pipe or drain will never be drawn up that discharge pipe to contaminate anything above. ...
d.george's user avatar
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2 votes

Can I gain AC efficiency by spraying condensate water on the outdoor coils?

Safer than going to the distribution box is to use a true RMS AC current clamp meter such as this: https://www.amazon.com/KAIWEETS-Multimeter-Auto-ranging-Temperature-Capacitance/dp/B07Z398YWF/ ...
V.M.V.'s user avatar
  • 21
2 votes

Natural Gas Tankless water heater condensate volume

Humidity will have little to no effect. The condensate is a combustion byproduct, and will be determined almost entirely by how much the heater runs - when the heater is running, expect pretty much ...
Ecnerwal's user avatar
  • 210k
2 votes

Can I gain AC efficiency by spraying condensate water on the outdoor coils?

I can answer from experience rather than comparison or speculation because I have done the very thing you describe, starting with a proof of concept using a window unit. This perhaps should be a ...
Steve I's user avatar
  • 139
2 votes

Should condensate pipe go below vent and how?

Use an appliance "wye" installed in an existing drain line, that way the water flows on an angle downward. https://inspectapedia.com/plumbing/Appliance-wye-Canplas.jpg Holes in drain lines ...
Philip Sowers's user avatar
2 votes
Accepted

Is it safe to tie a water heater pressure release pipe into an HVAC condensate drain line?

No it would not be safe. I do not know the settings of your valve but I expect the water would be in excess of 180F or about 82C, to over the boiling point of water,it is under pressure. That will ...
Gil's user avatar
  • 6,973
2 votes

Condensate drain line corroding foundation. Looking for solution

You can connect it. You should make sure everything connected to that vent stack at or below the level where you add your pipe, is connected with a wye and not at 90 degrees. You don't want your ...
jay613's user avatar
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2 votes
Accepted

A/C Evaporator Coil - Water dripping from unknown fitting

(From OP) I found this image online, which I believe is what I have in my coil box: If the primary drain (right outlet) gets clogged or partially clogged, the condensate inside the evaporator will ...
TeeRaff's user avatar
  • 21

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