Questions tagged [cooling]

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30 views

Looking for ideas to vent a 2nd floor utility room

I'm a software developer who's worked at home for 20 years or so. I recently moved to the country, and have all my IT equipment in a 2nd floor "utility room". This room also has the water ...
0 votes
1 answer
35 views

AC/HVAC Situation in New Condo - Cooling and Heat doesn't turn work unless 25% of LG AC/Heat Units are turned on at once [closed]

I recently moved into a condo in Brooklyn, NY. After many issues with Heating/Cooling, we have had a few HVAC companies look into the issue. It turns out that in order for the Heating or Cooling ...
0 votes
1 answer
11 views

RT18M6215SR Samsung Issues Staying running

Will freeze and then starts to thaw and eventually not cool. Tried another outlet, separate breaker, it did the same.
2 votes
1 answer
36 views

Ceiling exhaust fan to extract office heat to larger atrium?

I'm trying to make my office less stiflingly hot during summer afternoons. My house is 2-story, and the corner of the office juts out into the main house, such that ~20sqft of its ceiling is under a ...
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0 votes
1 answer
51 views

A/C air handler in Attic duct runs

I’ve noticed that all of my ducts in the house have great air flow where I can easily hear the air flowing from the vent. There is one room that doesn’t have good pressure and I can tell the room ...
4 votes
1 answer
322 views

Do I have the balance the ventilation to make the most of the stack effect?

I live in a typical 1960s UK home, built of brick with two floors. My home has big windows (especially facing south) and has a really large solar gain causing it to be very warm in the summer. I'm ...
0 votes
1 answer
22 views

Wiring of a Vine TJ225 thermostat

How do i wire a TJ225 Vine thermostat? I have 2 red wires, a green, a white, and a blue wire. Red wires go to RH, and R, G goes to green, white to white, and the blue goes to Y on the old thermostat, ...
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0 votes
0 answers
38 views

omit a cooling stage to better align with unbalanced Heat Pump demands?

My 2002 house near Albany, NY has central heat but no AC. I've run several manual J calcs and yield 29k cooling and 53k heating. I'd like to use the heat pump for my primary heat and leave my ...
1 vote
1 answer
85 views

Our AC isn't cooling to the set temperature

Our AC isn't cooling to the set temperature. We got one tech from Company-A to come and he said that the Freon is a bit low. So, on hot days, they can't keep up. But our unit has an older R22 Freon, ...
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1 vote
2 answers
70 views

Fan Coil connected to Heat Pump raises humidity in cooling mode

I own an apartment with a Daikin heat pump system that provides me both with heating/cooling and hot water. The system has both in-floor heating and 4 fan coils hooked up to it, and these are on 2 ...
0 votes
0 answers
72 views

From Honeywell to Google Nest... not cooling?

I recently changed my thermostat from an old Honeywell 7-day to a Google Nest. I'm an idiot cause I didn't take a photo before replacing it. now, I feel the air is not cool, just air/fan. The NEst is ...
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3 votes
1 answer
2k views

Why does my heat pump "blow" at warm (even hot) outdoor temperatures? Should not it be inactive?

We have a Hoval UltraSource B compact C (8,11/200) air/water heat pump in our house. I have noticed in warm weather that occasionally my heat pump "blows" outside. I then thought that my ...
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0 votes
0 answers
44 views

Can I connect a C wire to enable a furnace fan?

Hot weather is here and we don't have AC in our rental house, but our thermostat does have the fan option. After searching online, and seeing other solutions, I decided to look into our setup. All ...
0 votes
0 answers
29 views

Thermostat swap

While switching out thermostat I noticed only two wires instead of more Rh W to be specific. The new thermostat has no Rh only R and Rc on Wich I selected R. Heat turns on now but doesn't turn off at ...
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0 votes
0 answers
38 views

Radiant Barrier: with or without Insulation?

Researching an attic radiant barrier for my old home has yielded two general classes of radiant barrier: simple films and then sandwiches of film/insulation/film. Is there really much benefit to ...
5 votes
2 answers
912 views

CFM Required to Ventilate Room to Maintain Temperature

I am designing a computer room inside my home. The room walls are inside the house. This question excludes floor, wall, and ceiling losses/gains. I am looking for the formula to calculate the CFM ...
0 votes
0 answers
34 views

nordyne hvac furnace will not fire up, tries 2-3 times, the grey resistors get real hot

nordyne furnace kept giving me communication code, replaced thermostat, ran fine for a week. get pressure switch codes so i replaced them. now it starts cycle and wont fire, if i leave the unit off ...
4 votes
1 answer
2k views

Why do I have 3 HVAC professionals telling me 3 different things about heat gain/heat loss?

I sent the same set of house drawings to 3 different firms that size HVAC equipment. They each sent back signed designs. Here are the results: Firm 1: 65k BTU/h Heat Loss – 45k BTU/h Heat Gain Firm 2: ...
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19 votes
7 answers
7k views

Why is my house energy efficient only in winter?

My electric utility company sent me a graph of my home's electricity usage over time as shown in the picture below. My home beats what the company considers as efficient homes in the neighborhood when ...
0 votes
0 answers
41 views

Heat pump running on Heat and fan or Cool and fan

We just had heat pumps installed. I know that you cannot have the heat and the cool going at the same time. But can you have a head in fan mode and another head in heat or cool mode? Sorry for the ...
0 votes
0 answers
50 views

Casement Windows: Install Thru Wall A/C Indoors & Exhaust with Ducting

A family member has a business in a century-old building that only has industrial casement, awning, and pivot windows. There's no central A/C & a mini-split can't be hung outside the building. The ...
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0 votes
1 answer
49 views

How to have skylight windows without turning the house into a cooker

My kitchen and dining room area has slanted sunward-facing skylight windows. It's great that it makes the space feel so huge, open, and bright, but during the summer it turns the whole house into an ...
0 votes
1 answer
68 views

Can I use a .006" (.15mm) orifice mist nozzle on a mid-pressure patio misting system?

Specifically, the pressure is around 200 PSI. I get the impression from what I have Googled that .006 and below may only work for high-pressure systems.
1 vote
0 answers
66 views

Why is this fan coil actuator missing a lever?

I live in a building where a lot of people have a hard time getting their units down to any acceptable temperature. We're all learning more about how fan coils work and one of the things that keeps ...
2 votes
3 answers
589 views

Meausure the temperature of a fridge

I have a refrigerator that is an old model (no name brand) and does not have indications of what is the actual temperature. I currently suspect that the temperature is higher than what I have set it ...
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1 vote
1 answer
298 views

Can I put a box fan in a chimney to help circulate out hot summer air?

I have a classic brick chimney for a wood fireplace only (i.e. no hot water tank or other things sharing the stack). In peak summer heat, the interior of the upstairs is well above the exterior ...
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1 vote
2 answers
409 views

Two floor home cooling with one ductless heat pump split mini mounted on second floor

I live in Seattle where we have a relatively small number of days where it gets hot enough to need AC. I live in a two story house where the two floors, each being 1200 sq ft in area, are connected by ...
2 votes
2 answers
98 views

Wiring a 24VAC solenoid and furnace summer fan to my thermostat for water cooling

I have an Armstrong heat only furnace, board# G2D95CT080V16C-2A and a Honeywell programmable thermostat, model#: CT2800A1017. I've got an abundance of water on my property and would like to run a ...
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1 vote
2 answers
2k views

How to fit portable air conditioner hoses through a too small wall vent

Our apartment doesn't have A/C, but we do have wall ports for a portable A/C unit. Unfortunately, I can't really fathom how I'm supposed to hook the hoses up to the wall vents. As you can see, the ...
1 vote
2 answers
217 views

Screwing jalousie windows shut?

My Florida home was built in the late 1950's and has the original jalousie windows. The house gets a bit warm inside on summer evenings when it doesn't rain. The central AC system was serviced two ...
-1 votes
1 answer
79 views

Does effective insulation of concreate block contribute more to energy efficiency in hot weather or cold weather [closed]

I am building a grout filled CMU house in the Ozarks. I have limited funds at this point and so I would like to focus my budget on thermal control where it will be needed most (i.e. heating / cooling)....
2 votes
1 answer
75 views

Sizing a window AC for bedroom, but with extenuating circumstances

I'm looking to install a window AC in my son's bedroom, which is about 120 sq ft. The guides that I'm reading suggest a 5000 BTU unit due to the size. However we live in the high desert where the ...
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0 votes
0 answers
70 views

How to improve cooling in a room/Cool a concrete wall?

Im on a 2nd floor room, it has big front windows and a small one on the side, I am using my computer/full setup on the corner of the room, where beside me is the window wall, but since im in the ...
1 vote
2 answers
339 views

Can I have independent heating zones with a standard boiler?

We have a new standard gas boiler in our home along with two thermostats, one for the basement and one for the rest of the house (living room, bedrooms, etc). The problem we're having is that the ...
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0 votes
2 answers
42 views

Thermostat for heating and cooling

I have oil fired baseboard heating and a separate AC system. Currently I have two older thermostats installed. I'd like to replace with a single unit, however I can't locate any thermostat that ...
0 votes
0 answers
41 views

Looking for an alternative part for a refrigerator

I have an old Samsung 2-door fridge. It's model is RS20NRSV. The damper control window isn't working anymore and it seems like finding parts for this model is difficult. EDIT 1: From looking at a ...
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0 votes
1 answer
33 views

Entertainment Area is cooling required with this setup? Where to position fans?

I am getting my entertainment area setup and I wanted to get opinions on where I should install intake/exhaust fans and if it would even be required. Within my "nitch" I am going to have an ...
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0 votes
1 answer
94 views

How do I fix my fridge that is not refrigerating?

My refrigerator (Frigidaire model #frt18b4aw8) is not refrigerating the refrigeration compartment, however the freezer compartment is freezing properly. I opened the back panel in the freezer and saw ...
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1 vote
2 answers
153 views

Are air coolers as effective as air conditioners?

I'm planning to buy an air cooler as it is less expensive to purchase and operate than an air conditioner. Are there any air coolers that can achieve same, or close to, the cooling effect that an air ...
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0 votes
1 answer
58 views

AC troubleshooting

I’m suspecting an upcoming issue with my split AC system. Currently it is working and cooling, however in the last week or so, I’ve noticed that after the AC reaches the set temp, the copper line ...
0 votes
2 answers
67 views

RV heating and cooling using multiple sources of fuel

I'm trying to design an all terrain/all weather RV for some extreme camping and I'm wondering if it's possible to have a multiple fuel source heating/cooling/refrigeration system. I want to be able ...
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0 votes
0 answers
49 views

AC not blowing cool air, Contractor said HVAC unit is perfectly fine and that it has to do with my smart thermostat (Ecobee 3)

So basically I changed out the filter on my HVAC unit (National Comfort Products, Model CPG41238-U23) and after I did that the AC stopped blowing out cold air. It was working completely fine until I ...
0 votes
0 answers
2k views

Cold air blowing from return air vent

Cooling stopped working on my second floor zone, and cold air was blowing out of return air vent. I turned off the power to HVAC , it didn't work. When I turned off the thermostat of my second floor ...
1 vote
1 answer
192 views

Sizing HVAC: 3 vs 2.5 ton AC, 60k vs 40k BTU furnace for 1200sqft?

I'm adding a HVAC system to my single-storey SFH (1200sqft in climate zone 2, San Jose, CA) and the contractor picked out the following system: Furnace: 60k BTU @ 80% Efficiency AC: 3 Ton @ 14 SEER ...
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0 votes
2 answers
374 views

Which AC Hard Start kit capacitor I should use?

My AC system is getting very old and I was wondering if I should add a Hard Start kit and with what spec? Here is my AC spec included below and the existing Dual Run Capacitor is 440volt and 40+5MFD.
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0 votes
1 answer
1k views

Adjusting Blower Speed for Central AC

I am trying to lower the fan speed on blower fan. It is currently set to factory default setting. My AC is 3 ton unit. Model no is 4A7A3036H1000NA. The fan settings on IFC are like TAP 1, 2, 3.... and ...
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2 votes
1 answer
466 views

Does leaving fridge doors open several minutes at a time lead to partial freezing of food?

I was hoping someone could help weigh in with a technical explanation here. We have a Whirlpool fridge that is only a few years old, and often notice that food near the back of it (and usually towards ...
1 vote
2 answers
114 views

Is my brand new central air conditioner short cycling?

I just had a brand new air conditioner 5 ton condenser, coil and furnace installed in a 3,300sqft colonial in Connecticut. It’s 1am right now, 75 degrees outside with 97% humidity. I have my upstairs (...
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0 votes
1 answer
34 views

What would cause my line sets to equalize in cooling mode?

My heat pump line sets only get different temperatures briefly on startup in cooling mode. Then the hissing noise stops and they equalize and only the lower 1/4th of the a-coil gets cold and ...
1 vote
1 answer
3k views

Why would turning off a fridge/freezer for 24 hours then turning it back on make it work again?

A family member's fridge freezer is now working well after being turned off for about 24 hours and then back on. Before, it was not cooling items, reading around 20 degrees Celsius. Now, after being ...

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