14
votes
Accepted
Optimal Bath Fan Location
The fan creates air flow through the bathroom. Air enters from somewhere, and exits through the fan to the outside. The entry point is usually the door but it might be a window if you generally ...
- 43.4k
12
votes
Accepted
Does my AC vent air from the room to outside?
No ordinary residential split or minisplit a/c unit does any venting of inside air to the outside. There are two separate air circulation loops and they are not connected.
Inside air at the inside ...
- 22.5k
10
votes
Does my AC vent air from the room to outside?
This sounds like a "split sytem". two parts with a trunking running between them.
These do not provide ventilation, only cooling, dehumidifying, and in many cases heating.
If it is a box ...
- 23.2k
10
votes
Optimal Bath Fan Location
Given that you have ducting (hopefully 4” or bigger) and a hole in the ceiling, put the new one where the old one was.
There might be a fractional improvement pulling air right above the shower, but I ...
- 23.1k
7
votes
Modifying the thermostat of a regular AC to create a refrigeration room?
There is a product I use to cool my brewery's cooler using a mini split (although it works with other types of air conditioners as well), called a CoolBot. The basic idea is that it tricks the AC's ...
- 243
6
votes
Modifying the thermostat of a regular AC to create a refrigeration room?
A normal split air conditioner unit is very simple to control: just short the Y terminal to the R terminal. Maybe G to R also, depending on whether the air handler/furnace turns on the fan for cooling ...
- 32.1k
3
votes
Optimal Bath Fan Location
The location of the fan really doesn't matter. The goal of your fan is to take warm, humid air from the ceiling and vent it outside to reduce humidity. This is necessary to limit the growth of mold. ...
- 25.6k
3
votes
Central a/c unit leaking water through ceiling
You're in a condo and you rent. Call the the owner or owner's property management company. Tell them the problem is not rectified.
- 37.6k
3
votes
Should an HVAC technician be expected to examine the coil when called to troubleshoot a condensate drain?
It is not uncommon for AC drain lines to become clogged.
The Tech would be expected to check the line and clear it if it was clogged. Inspecting the evaporator would not be normal, because the issue ...
- 37.6k
2
votes
Accepted
sampling low-voltage HVAC signals with digital hardware
You didn't come out and say this part, but having the data you're wanting to collect will be helpful in understanding HVAC operating patterns, correlation to outdoor weather, and especially in ...
- 32.1k
2
votes
AC Condenser making loud noise on start up
Something to ask your installer:
With this compressor unit being on the roof of a 3 story building, are the refrigerant lines longer than 80 ft to your indoor unit? If so, this is considered a "...
- 21
2
votes
Accepted
Is a rapidly turning on and off water sensor in A/C pan bad wiring or a bad sensor?
I was correct in thinking it was improper wiring. This device appears to be solid state in nature. There was very clear instructions and even a red flag on the wire noting which side had to go to the ...
- 371
2
votes
Accepted
Best Mini Split BTU Size for Hot Miami Garage: 12'W x 28'D x 12'H
The condenser must be mounted outside.
Communicate with the manufacturer of the unit as to the length of the lines. There may be a need to have freon added to make up for the extra length. This may ...
- 37.6k
1
vote
AC Issues in two story home
Since you have two thermostats and one AC unit you must have what they call dampers
Dampers are controlled airflow valves, that adjust according to the control board set up.
Go to the control board ...
- 18.8k
1
vote
Accepted
Basement ventilation for small amount of Radon and some fresh air
I was able to search more about HRV and ERVs, and the best for my environment at this time seems like an HRV. There were a lot of helpful comments on some products on SupplyHouse's website. It sounds ...
- 101
1
vote
AC Condenser making loud noise on start up
Sounds like a compressor, could have wrong refrigerant but could be lots of things. Needs a pro to come look at it to diagnose. But sooner rather than later there won’t be a noise or cold air….
1
vote
bypass an HVAC unit float switch (safe-t-switch)
These usually operate by opening the circuit. They can be defeated by shorting the two wires together. Either follow the two wires, see what they connect to, and connect those two things together -- ...
- 32.1k
1
vote
What is the blue liquid dripping from outdoor unit of split type air-conditioner, and how to fix?
Any of the known chemicals that are used in refrigeration and referred to as "Freon", boil and dissipate as a gas at a temperature far below ambient temperatures.
There are a few options for ...
- 37.6k
1
vote
Accepted
Wire Duct fan to ONLY come on when calling for heat or cooling?
If I understand your notation correctly you already have a relay with 24 volt coil rated to switch the 120 volt AC mains power drawn by the booster fan. Is that right? If so, simply get another of ...
- 32.1k
1
vote
Accepted
Fan coil filter access blocked by door frame
Frame challenge: there isn't anything sacred about that particular size of filter for your air handler. Choose a different size filter.
It looks like an 18 inch wide filter might be a good compromise ...
- 32.1k
Only top scored, non community-wiki answers of a minimum length are eligible