Questions tagged [cooling]

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How to wire ecobee thermostat to central heat pump (two wires only)

I apologize in advance if this is not the correct forum for this. If so, please let me know where I should start. I am looking to have my central heat pump set up with Ecobee Enhanced. For background, ...
Zach's user avatar
  • 173
0 votes
1 answer
46 views

Will I have condensation on a slab cooled with groundwater?

New Construction, SLAB COOLING I’m planning a 24’ x 24’ two story studio with guest quarters, kitchenette & bath. The first floor heat will be an insulated concrete slab with PEX, boiler ...
Robert's user avatar
  • 1
-1 votes
1 answer
92 views

Should I replace an old furnace with a mini split unit? [closed]

I have a very small house that is close to being 700 ft.². I live in the middle of Illinois some winters it gets really cold , many degrees below zero. Last winter I noticed my furnace having a bad ...
Brock Neill's user avatar
0 votes
1 answer
233 views

Insulation in basement ceiling with no heat? [closed]

I have fiberglass insulation in my basement. It's been there since we bought the house, but our basement is not heated. I've heard this is possibly a bad idea. I also think there may have been mice ...
Mike's user avatar
  • 9
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0 answers
32 views

two stage heat pump and condensing boiler run off one 3rd gen thermostat

I have a 2 stage 20 seer bosch heat pump utilizing aux heat strip. I also have a navien condensing combi unit for domestic and hot water baseboard heating. no hydronic coil to air handler. Boiler only ...
Brian's user avatar
  • 1
0 votes
0 answers
39 views

Why does my fridge only cool the top two shelves?

Fridge doesn't cool properly. Bosch thermostat is blinking and only the top two shelves are cool. The temperature increases as you go down the shelves. The bottom shelf is almost at room temperature. ...
Display name's user avatar
0 votes
0 answers
95 views

Air conditioner outside unit / condenser does not come on when thermostat calls intermittently / usually works after switching break/pulling fuse

A few times over the past two weeks, my central AC unit would stop producing cool air. The inside fan (furnace blower?) would be working, but since the fan on the outside condenser was not running it ...
HelpEric's user avatar
  • 489
0 votes
0 answers
28 views

Can I reconfigure two 5" ducts into a single line & what size should they be?

I am trying to move a floor register location. Currently I have two 5" HVAC ducts being fed from a 6" x 10" rectangular trunk. The one 5" run has the register in the middle of ...
Moe's user avatar
  • 11
-1 votes
1 answer
52 views

Cooling water tank with no electricity [closed]

I’m not an engineer, but I love to explore some home issues from time to time to see how people solve it I was browsing YouTube for a solution to cool home water tanks in high-temperature environments,...
AFT's user avatar
  • 101
0 votes
3 answers
281 views

Mini split to cool one room and heat another

We live in a three story house, with our bedroom in the third story loft. On sunny days, it gets too warm up there, even with the windows open (not to mention the neighbor’s 4:00am rooster crowing). ...
Chad's user avatar
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4 votes
6 answers
3k views

How should I deal with an air conditioner that doesn't keep up?

I've been having some minor trouble with my ac. When it gets hotter, towards the afternoon, it will lose ground and only be able to cool two degrees higher than what the ac is set to. For example, if ...
Retrobirdcardboard2223's user avatar
0 votes
2 answers
96 views

Sealing ducts myself

I have a furnace with AC in the basement. I have poor airflow in my top floor vents (furthest from the furnace). and even the room with the cold air return doesn't change temperature very quickly. ...
Camron B's user avatar
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0 votes
0 answers
32 views

Garage airflow ideas

I know this has been asked a multitude of times before, but I feel like I have a more unique scenario that wasn't directly addressed. I have a 2 story home in SoCal. Garage temps aren't unbearable, ...
Matt's user avatar
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1 vote
0 answers
139 views

Why is my evaporative cooler rattling?

I have a brand new evaporative cooler. It was great for a month, until it started making a rattling noise. We found a bolt behind the bearing that fell out and glued it in. This only temporarily ...
May's user avatar
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0 answers
19 views

Blower works when the thermostat is on "COOL" and "FAN ON" rather than on "COOL" and "AUTO."

I have the old AC outdoor 567G and furnace 394G system. Several days ago it started working when thermostat was on "cool" and “AUTO.” But after several minutes the blower inside the furnace ...
Rafael Yanushevsky's user avatar
0 votes
1 answer
45 views

Installing an exhaust fan to attic to cool house

No AC in house, No option to get one. I've been getting by with the usual tricks, but I think I may be onto a good idea and I'd appreciate some vetting. My attic has a drop tile entry, and I am ...
PoorSoddingNovice's user avatar
3 votes
2 answers
142 views

How to cool an east-west mid-terrace house in UK

I live in a mid-terrace house (c1900) in the UK that faces east-west (roughly). The front door faces east; back door (opening into garden) faces west. There are no trees on our street. We have three ...
richarddmorey's user avatar
1 vote
0 answers
146 views

Multi-split Daikin air-conditioner errors and temperature issues

I have two indoor Daikin Perfera FTXM-R units hooked to a 2MXM-N9 outdoor unit. What I noticed is that the indoor unit closer to the outdoor unit (A) will start to report a very low temperature if I ...
Andrei Pietrusel's user avatar
1 vote
1 answer
59 views

Two Identical A/C Units with Different Readings / Pressures not Stabilizing When Off

I have two separate systems with one in the basement servicing the main floor, and the other in the attic servicing the upstairs. The upstairs has been struggling in 90F heat ever since we moved in ...
JSess's user avatar
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0 votes
0 answers
62 views

Heat Recovery Systems for cooling - how good are they?

I live in a flat in the UK where it gets quite hot indoors and outdoors for some of the year, though rarely above 35c outdoors. I currently have a nuaire HVAC system installed, with all the ducting, ...
jacko1234212's user avatar
0 votes
0 answers
429 views

Is it ok to connect air conditioner from one room to another using duct and exhaust fan

I have two rooms both has the area of 100 sq.ft and together 200 sq.ft. According to AC tonnage calculation , 1.5 TON AC is enough upto 90 to 250 sq.ft area. Sine I have 1.5 Ton AC , I'm thinking to ...
King's user avatar
  • 107
0 votes
2 answers
752 views

Can I turn an old fridge into a water chiller?

I want to cool down water to near freezing (<40F or <5C). I have an old fridge that I don’t mind ripping apart. I was wondering about the feasibility of getting the cooling unit in the ...
Frank's user avatar
  • 1
5 votes
10 answers
3k views

Would sprayed insulation under the roof deck cool down a hot attic?

Typical 4-br type 80s-ish build suburban house in the south: downstairs ac is super-powerful; upstairs ac is fair. Hard/impossible to keep the upstairs below about 75 say in summer. The problem is the ...
Fattie's user avatar
  • 182
0 votes
0 answers
68 views

What is the best way to cool a vaulted ceiling in a marine tropical environment?

A house I am working on has vaulted ceilings with no insulation or ventilation, so the rooms get very very hot during mid-day to afternoon, especially in the summer. The house has a white standing ...
William's user avatar
  • 101
1 vote
3 answers
1k views

Is a 9000 BTU split heat pump oversized for cooling a 156 square feet room (Quebec climate)?

I want to cool a single bedroom during the sumer with a split heatpump. I will only run it during the night, with door closed because I don't mind heat during the day, I just have a hard time sleeping ...
Max L.'s user avatar
  • 123
0 votes
0 answers
127 views

North-East facing room - Gets too hot - Suggestions required to keep my room livable

I am in the hottest part of Southern California. My room is North-East facing and in summer when it is usually 115 F outside, my room gets really unlivable - live it is 95 F inside the room despite ...
oneworld's user avatar
  • 101
12 votes
8 answers
4k views

What can I do to cool down the room?

The room is at south-west on the second floor, so a lot of sun exposure. The temperature got unbearable up to 36.5°C (97.7°F) yesterday. The outside was 37.5°C (99.5°F). I live in a hot and humid ...
user165673's user avatar
1 vote
0 answers
47 views

I live in a mobile home. The other day my AC stopped working. It does not get cool. I've changed filter, new batteries, switched breaker

I live in a mobile home. AC not cooling. AC about 5 years old. Changed filter, new batteries, checked breaker. Thermostat seems to be working.
Geri Garnet Unrue's user avatar
0 votes
3 answers
647 views

Can you use water from a municipal supply and return it for home cooling? [closed]

You can make your own solar and back-feed it into the grid and get paid for it (while getting severely ripped off, nonetheless). Here's my idea: Since water coming from the city supply is ~45-55 ...
TechGuy's user avatar
  • 25
3 votes
2 answers
464 views

Weatherize old multifamily building against extreme heat

I live in a medium-size co-op apartment building from the 1920s (30+ units, 3 story, in Seattle). As extreme weather events have intensified in recent years, we have gotten more interested in ...
Maximilian Press's user avatar
0 votes
0 answers
16 views

1F95-1291 White rogers thermostats run ac while furnace on

I have two 1F95-1291 White rogers thermostats for 2 furnaces and ac's. While both furnaces run, 1 ac comes on each morning for a set time. What's wrong?
Nicole's user avatar
  • 1
0 votes
1 answer
407 views

Thermostat is not starting furnace using Taco sr502

I have a taco sr502 (2-zone switching relay). At the thermostat, there is no power when I hooked up a voltage meter to the red & white thermostat wires. No heat or ac is turning on. There is a ...
user571897's user avatar
1 vote
3 answers
107 views

Would I be better off with an oversized air conditioner or augmenting with a window unit on a 60A service?

I have 60 amp service coming into my house. I'm looking at installing a through the wall air conditioner. The ceilings are 10 foot so I know that I'm going to need to oversize the standard BTU rating. ...
Billy Bob's user avatar
0 votes
2 answers
138 views

Should I baffle and vent hot air back into the house if there is an open air exhaust fan?

We recently installed balcony skylights in our western-facing, semi-finished attic "bonus room". Part of the ceiling was cut away and LVL beams were instaled at the hips and joining rafters ...
Laramie's user avatar
  • 435
1 vote
1 answer
81 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 ...
MushyMiddle's user avatar
2 votes
1 answer
119 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 ...
user avatar
0 votes
1 answer
128 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 ...
Envieddesigns's user avatar
4 votes
1 answer
448 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 ...
ChrisFletcher's user avatar
1 vote
1 answer
619 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, ...
Naresh's user avatar
  • 11
1 vote
2 answers
357 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 ...
Tamás Deme's user avatar
0 votes
0 answers
336 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 ...
Cent's user avatar
  • 149
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 ...
Sybil's user avatar
  • 151
0 votes
0 answers
67 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 ...
Phantazm's user avatar
0 votes
0 answers
44 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 ...
Dee's user avatar
  • 1
5 votes
2 answers
2k 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 ...
John Hanley's user avatar
0 votes
0 answers
52 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 ...
Anthony Fiore's user avatar
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: ...
ziptron's user avatar
  • 313
20 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 ...
Fijoy Vadakkumpadan's user avatar
0 votes
0 answers
81 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 ...
user141945's user avatar
0 votes
0 answers
65 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 ...
Steven's user avatar
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