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re-wiring/retro-wiring a Carrier 40MVC024 ductless A/C for external thermostat: guidance

My server room has two air-conditioning units, with acutely counterproductive controls. I want to rewire them for external thermostats. Can I simply splice a traditional thermostat inline with the "...
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5answers
157 views

AC Strategy for Energy Efficiency

For environmental and cost reasons, I'd like to use my AC unit less. In situations where passive cooling is not practical, I am trying to determine the most efficient way to do this. (I believe the ...
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3answers
103 views

Home not cooling at night

Recently, we've started using the AC less for cost and environmental reasons. When it gets below 82 degrees (F) at night, we open the windows. My understanding is that the cool air from outside ...
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0answers
19 views

Install minsplit ourselves?

How hard is it to install a minisplit ourselves? Do you need to be certified? Is it difficult to get the extra supplies we might need? We are reasonably competent homeowners who have done renovations ...
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3answers
159 views

Compensate inadequate exhaust vents for whole house fan by installing a power vent in attic?

I would like to install a whole house fan in my 2400 sf house. However, with only three 1 ft x 2 ft gable vents, I'm looking at an NFVA of only 3 sf of exhaust vent when taking into consideration that ...
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1answer
36 views

How to improve my air cooler?

I recently grabbed a cheap (as in 70€) air cooler to chill a room (45m³). Expectedly the inner workings of the cooler are quite basic, a pump circulates water from a reservoir through some kind of ...
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3answers
126 views

How to diagnose and fix apartment AC that makes intermittent whooshing noise

My AC recently (I think, it's pretty new, possible I just didn't notice before) started making a whooshing noise. It sounds kind of like a sudden gust of wind, but it repeats every few seconds. ...
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0answers
55 views

Inexpensive ways to cool the house as a renter

I am renting a house with a few other people. The house is fairly old and the leasing company refuses to do any expensive renovation and it would be inconvenient to everybody living in the house ...
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0answers
16 views

required space below whole house fan vent

I am installing a whole house fan in an old bungalow. There are no hallways in our house and there is really just one place that makes sense to install the fan inlet. That location in central and ...
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0answers
35 views

What's the best method of insulating windows against solar heat?

(TL;DR at the end ;) ) I live in Western New York, and while it's pretty uncommon to reach temperatures over 95-100, it still gets pretty hot here, and we typically have 70-90% humidity on top of it. ...
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2answers
24 views

Air conditioner venting

What about venting a portable air condtioner into the cold air return of the furnace? Good idea or not? Trying not to go through a waal and no window access Thanks
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0answers
688 views

LG Bottom Freezer French Door Refrigerator not cooling

I have an LG Bottom Freezer French Door Refrigerator that is not cooling. I plug the refrigerator in after sitting for a few hours. Inside the refrigerator the temperature controls read 4 for both ...
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1answer
77 views

Best type of fan for sucking air through a small hole?

I'm trying to cool a little server farm in my rented apartment that consumes around 5kW of electricity. The insulation of the building is crap and there is no central heating so during the winter it ...
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1answer
31 views

Something is wrong with the airconditioner

I have never experienced anything like this. The ac keeps on leaking and now there is a bubbly formed underneath it! I manage this restaurant and it's the first time I am running it solo without the ...
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0answers
44 views

Small rental house has trouble staying cool

I live in Southern California and the heat wave has just begun. I need some assistance doing what I can with keeping my place cool. Here's a quick summary of my place: 1 bedroom,kitchen connected to ...
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4answers
49 views

On heat load calculations

My question is simple. Is heat load calculation the same for sizing air conditioners as it is for sizing radiators? I.e if an AC guy gives you the heat loads which lead him to select particular air ...
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2answers
135 views

Keeping a shed warm in winter and cool in summer

I live in the UK, with damp cold winters and modestly hot summers. I have a 2.4Mx2.4M (8ftx8ft) shed that I use as a woodworking workshop. I'd like to make it warmer in winter and cooler in summer. I ...
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1answer
106 views

Installing Honeywell RTH9580WF on ICM280 Furnace Control Board

I bought for my new apartment thermostat Honeywell RTH9580WF to replace my old Honeywell TH3110D1008. I watched almost every video I could find on internet "How to do it", but I couldn't fined ...
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1answer
36 views

Fridge: short vs long cycle

My fridge broke, so I replaced the analog thermostat with an ESP2688 + relay + DS18S20 temperature sensor. My server is getting the temperature readings every 10 seconds and is capable of switching ...
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2answers
115 views

Living near a highway in SoCal with no standard windows - how to install A/C?

I have an air purifier and keeping all windows/doors closed is going to be a must. But the humidity and temperature are issues now. I can get a dehumidifier but then I'm left with the temperature ...
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3answers
601 views

Can I build my own walk-in meat cooler?

A family member is building a brand new barn and she's amenable to my idea of makeshift-ing a 4'x4' (or so) closet that would be used primarily for meat ageing (I like to hunt) but also pickling and ...
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2answers
2k views

Does keeping downstairs air off at night force the upstairs hvac to work harder?

We live in a two-story home in Florida, about 3,000 sqft. We have an HVAC for downstairs, and one for upstairs. We typically will leave downstairs pretty warm at night (~80), and when we're ready for ...
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3answers
625 views

Does leaving ceiling fans on improve A/C effeciency?

Let me start with saying I know ceiling fans don't cool the air. My question though, is do ceiling fans help circulate the cool air from the handler in such a way that it would trigger the thermostat ...
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3answers
144 views

How to cool a server closet with window?

I put 2 servers in my closet which run at about 90F. The closet has a window, but simply opening the window doesn't drop the temperature very much even when it is 60F outside. If I open the closet ...
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1answer
30 views

I have a York heat pump…the condenser is coming on but the blower motor isn't. Model# F6FP030H06T3XH

My blower motor doesn't come on but the condenser does when cooling is called for. Relay is good...motor is good...transformer is good...I am getting 24v on G at control board...motor does nothing. ...
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1answer
12k views

Better to run air conditioner fan on high or low speed?

In my apartment, I have two window air conditioning units. Both have different settings for the fan speed: one has two speed options and the other has three. Both have the design that the room ...
2
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2answers
606 views

Trying to set my thermostat to use FAN only for cooling

I have a Bryant 60k BTU gas furnace(about 6 years old) and no AC. I can manually turn on just the FAN or leave it on AUTO for heating. I have the RITETEMP 6025 thermostat. At the moment I am cooling ...
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2answers
164 views

What is the recommended Temperature setting for dual zone homes when not at home?

Our home is a 2 story house(about 2200sq ft + basement) after reading some posts here I have set 75F on first floor and 77F on second floor which are both comfortable settings for us. But, i'm ...
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6answers
2k views

Options to cool attached sunroom

I live in the northeast US and recently bought a home with an attached solarium facing south. Roof is composed of reflective double-pane Anderson windows. Sides are nearly floor to ceiling double-...
1
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3answers
73 views

Thermal cameras for AC issues, especially cell phone types

I live in SW Florida so energy use is largely air conditioning. Our electric bill is much larger than I think correct based on comparisons to others, but I can find nothing specifically wrong - I ...
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2answers
1k views

High humidity in an unused, air-conditioned, finished basement; dehumidifier?

I have a partially finished basement that is connected into my house's 2-ton A/C system. The humidity in the space is consistently high during the summer (60%rh and up), and I believe that this cool, ...
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4answers
1k views

What is a reasonable air-conditioning schedule to prevent humidity issues?

In North Florida (Jacksonville), is there an effective temperature cooling profile to ensure to avoid issues associated with excessive humidity? Assume that I can tolerate any level of heat. Damp-...
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1answer
1k views

Can I move warm air from 2nd floor to basement to help with heating?

I have a finished basement with an open stair well to the 1st floor which even in the middle of the summer needs to be heated to stay at 69F degrees. There's also a large open foyer leading to the 2nd ...
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0answers
64 views

Reason to run a fridge compressor fan other than when compressor running

In regard to a small sailing yacht galley fridge, would there be any reason/benefit/need to run the compressor radiator fan any time outside of that which the compressor is running itself ? Ie just ...
0
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2answers
662 views

What size start capacitor should I buy for my refrigerator compressor?

What size (in horsepower) 3-in-1 start capacitor should i buy for my fridge compressor? I have an LG LRSC26922TT from 2003. The compressor isnt staying on due to (i think the PTC hooked to the ...
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4answers
1k views

How can I lower my room temperature?

My room has the following window: My room becomes extremely warm whenever the day is sunny (the window is facing the south) and the outside temperature is a bit warn (> 60F/15C). Yesterday for ...
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0answers
53 views

Room cooling for room without air conditioner

How do i pull the cooling from one room with the air conditioner to the other room ? Have already made a 2' x 6" slot in the partition wall with an exhaust fan but that does not seen to help???
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2answers
1k views

How can I get my upper level to be as cool as the lower level?

new homeowner, attempting to fix the upstairs before it gets too hot without getting a second HVAC. Right now, it will be 72 downstairs, but 84 upstairs. We've got a new ecobee thermostat with a ...
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0answers
7k views

'Wait' indicated on my Honeywell RTH7400 thermostat after 1 week vacation

New Homeowner (December) and I need help troubleshooting. Everything was peachy keen until I returned from a week vacation. A/C will not cool, but fan will turn on if I take it off of auto. "Wait" is ...
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0answers
28 views

First cooling problem then buffle switch error

I have been waiting for my refrigerator do defrosting manually for the past 2 days. I have decided to do this because there was water leakage to the bottom section of the fridge and got an error ...
2
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2answers
97 views

How to reduce my electric bill [closed]

Update Learned a ton about heat pumps, and wondering about Solar. Does anyone in the northeast have solar roofs? (solar shingles) I live in an all electric home (single family detached house) in New ...
1
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3answers
87 views

Garage Conversion and HVAC

What is the best way to bring heating and cooling to an attached garage? Our HVAC is being replaced, and our large family needs the garage for living space. Wed be going from 1500 sq feet, to 1900 ...
1
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1answer
314 views

What's the maximum recommended temperature for your house while away?

I live in Florida, so I'm not really concerned at all about the coolness of the home in the winter. However, I'd obviously like to save as much energy as possible while gone for the day during the ...
0
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1answer
63 views

What is the best way to convert a garage to livable space? [closed]

Garage Conversion We have an attached garage that has finished walls with no insulation, angled roof with no insulation and exposed rafters, and a new roll up uninsulated garage door. It has a side ...
0
votes
1answer
154 views

Mini Fridge thermostat turns on/off doesn't cool

I have a Magic Chef Mini Fridge 2 door from Home Depot (HVDR430SE) that doesn't cool. It has no evaporator or condenser fan because it is a sealed unit. The thermostat clicks on, starting the ...
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0answers
63 views

Portable air conditioner question

I've picked a portable HVAC unit. It's a 2.6 KW 10,000 BTU model. The only way I will be able to vent it is by cutting a hole in one of the glass windows and and using the special fitting. I wanted to ...
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2answers
456 views

geothermal cooling with no heat pump?

I'm buying my first house (1000 sq ft) and it has an old, unused water well. It has a central furnace but no central AC, only window units. I want to use geothermal to condition the air, but only to ...
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2answers
2k views

Whole house fan possible with vaulted ceiling?

I live in an area where I think a whole-house fan would be a big benefit. But my upper floor has a vaulted ceiling. I don't know anything about the construction. There is a ceiling fan, but it ...
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1answer
53 views

Please help me! [closed]

When setting my programmable thermostat should the 'heat to' or the 'cool to' setting be higher? Please ask me if you need any more info to answer this question
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11answers
12k views

How do you cool a concrete home?

I have a large backyard and it has a structure that's basically the size of a small home. It is made out of concrete blocks and cement floors. So it has poor insulation and it has a low, exposed roof. ...