Questions tagged [air]

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Can I add an extension to an air intake for apartment central A/C? Is this a health or code violation?

The apartment I am living in has a nasty odor coming from underneath the furnace/ac and water heater. The air for the furnace is sucked up from this underneath section making all of the air that is ...
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1 vote
0 answers
17 views

Noisy non-return valve - does this heating schematic make sense?

I am in the UK. I have an existing closed (pressurized) heating system with a boiler downstairs and the rest of the works + hot water tank in the cupboard upstairs. Problem: when lots of radiators are ...
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Do wall ac/heater units bring in fresh air?

I live in an apartment with a combined wall AC/heater unit, like the type that you often find in hotels. Does this bring in fresh air when operating, or does it just recirculate the air inside the ...
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-2 votes
1 answer
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Why do compress air cans always seem to avoid mentioning their main use? [closed]

In the last couple of years, I've finally started buying cans of compressed air to blow out the dust from inside my computer, instead of using my lungs as I have done in all the years past. It feels ...
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Whirlpool Dishwasher leaks from the air vent

My Whirlpool Dishwasher WDF520PADM7 (2019) has the a passive style air vent on the upper left corner of the door (passive means there is no solenoid or fan). Water leaks from air vent assembly through ...
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Why is there intermittent air in my shallow well house water?

In the last few months I starting having air coming into the faucets of the house and low pressure. Through process of elimination I determined it was the water softener. I did a manual flush and ...
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4 answers
84 views

Is DIYing a replacement of Electric Furnace and Air conditioner worth it?

My Air conditioner does not produce cold air, however heater part in Furnace works just fine. Air conditoner Unit is at least 20 years old and have no coolent left in the system. I am looking to ...
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3 answers
86 views

Is there a difference between combining two fans in parallel and buying one with twice as much CFM?

I want to build something like an "air purifier". I'm considering a box where I have a big filter and I send the air from one side to the other. I want to maximize the air flow through the ...
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1 answer
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Preventing air conditioner from running when temp is below 65 degrees outside

Could l wire a thermostat outside and and set is to 68 degrees and use it as a switch to prevent the air conditioner condenser from running when below 68 degrees. And use in-line with the yellow wire.
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How to replace an outdated wall mounted air gap

I'm currently working on adding a ceramic tile backsplash to our wall behind the kitchen sink. One of the items mounted on the wall is this old air gap. Ideally the face plate and air gap cover would ...
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0 votes
3 answers
81 views

Split air con : getting outside air inside

I have a split air con Samsung SH09APG. It's a typical air con machine, with an inside and outside unit. I was thinking it would be really useful if it allowed the outside air to come inside the house....
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1 answer
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Dust buildup and vent airflow - Should my vents be completely open?

The room that I am in is particularly dusty compared to all the other rooms since I'm in it most of the time and it's very small with lots of stuff inside. I do my best to dust every surface but it ...
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Outdoor Ac unit causes home cinema to hum

The design of my new home placed the outdoor ac unit of my ducted system right outside my home theatre. I love my new house but this is really bothering me as it makes the home theatre feel like an ...
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1 vote
3 answers
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Purchasing parts for my HVAC as a retail user

My Trane air handler recently stopped working and after the couple of visits arranged by the home warranty service company failed to resolve the issue, I managed to identify the control board parts ...
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3 answers
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AC blower unit stops working intermittent

hoping someone with more knowledge then I, can guide me on this. Recently my central AC's blower unit stops working intermittent after its been on for a few days with no issues. When it stops working, ...
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2 answers
299 views

Is there a window or portable AC system I can use with an hopper window without removing window?

I'm trying to see if it's possible to install a portable AC with hose in this dorm room hopper window without removing the window (See picture attached). I can't seem to find anything online nor a kit ...
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0 votes
1 answer
81 views

What size duct for make-up air?

I have an industrial exhaust fan venting heat from the top of a stairwell. It is a CentriMaster ModelPRN PRN110 with specification sheet here: http://www.acmefan.com/InformationFiles/ModelInformation/...
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-1 votes
1 answer
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How to pump gases? (not compress them, nor create vacuum, just pump) [closed]

I have a container that is not hermetically sealed. It is filled with a certain gas/vapor: gaseous water (steam). I want to pump the gas/vapor outside, to the atmosphere. I have 2 questions: 1- What ...
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0 votes
1 answer
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How do i reduce and split hvac duct from 8" round into two rooms

Hi i have small minisplit with 350 cf/m i attached a plenum with 8 inch ridgit round duct attached to it now i need to run it into a bulkhead where one register goes into a small room aprox 12x12 ...
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3 votes
2 answers
609 views

Can I vent portable air conditioner into the garage?

I have a bonus space that is attached to the garage that we use as a home gym. I want to be able to run a portable air condition when working out. It will only run 2-3 hours a day and probably only ...
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1 vote
2 answers
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is it legal to have the air intake (for heater and ac) coming from outside in CA?

Our apt. building has the heater and ac air intake outside (collecting air from our driveway) in stead of coming from inside. is this legal?
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2 votes
2 answers
103 views

Would an electric furnace prevent outside air from coming inside my house?

I have an old oil furnace that is vented to a chimney flue, with a damper. I live in Maryland in a county where burning yard waste is legal. This can cause me to have an asthma attack when my furnace ...
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1 vote
1 answer
257 views

Why would a polarized plug not fit into a polarized extension cord?

I purchased a somewhat expensive name brand Beautyrest air mattress. Its electronic pump is at the foot of the bed, and its electrical cord is shorter than the length of the bed, making an extension ...
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0 answers
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Geo thermal air conditioning by natural air circulation

I live in the Caribbean and during the hottest evenings the temperature is around 86 degrees. We use conventional air con in the bedroom set at 80 degrees. The air temperature in the ceiling is much ...
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0 votes
1 answer
182 views

5 hp air compressor wiring

5 hp 80 gal 208/230 volt air compressor, amps 18.6-17.5, LR amps -95, KW- 2.98 Located 80-100 feet from panel--looking for wire size and breaker size thanks John on 230V circuit hp listed on tank ...
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0 votes
1 answer
71 views

Repurpose old compressor

I recently came across someone who was throwing away an old craftsman air-tank and compressor. They claimed the compressor did now work anymore as it would never build pressure. I had an old ...
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0 votes
0 answers
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Air handler fan relay keeps shorting out after using heat

Comfortmaker - FEM4X3000BL I’ve had two fan relays go bad in the past month, each time after using heat. (This is in Florida, we only turn the heat on a few times a year.) Wiring diagram attached. Any ...
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-2 votes
1 answer
26 views

Looking for a 14"x20" high quality furnace filter [closed]

With increasing dust, I'm looking for a good quality furnace air filter. This lead my search to the following: Honeywell 14 x 20 x 1 Elite Allergen (FPR 10) Filtrete MPR 2800 (MERV 14) My issue is ...
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-1 votes
1 answer
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Basketball doesn't get pumped [closed]

I have a new basketball, I have owned it just several months. When trying to inflate it with the pump, it feels like it gets inflated and deflated at the same time, so I either end up with less ...
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-3 votes
1 answer
135 views

Air compressor first use - plug needs to be replaced? [closed]

I was wondering if anyone could help me with this problem. My brother bought an air compressor recently and found this note. What does that mean, which plug should we replace? This yellow one with two ...
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1 vote
1 answer
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Can I use two layers of window film to create a narrow, convection-reducing gap?

This is a follow-up to this question. The official answerer A.I. Breveleri writes: The ideal separation distance between film and glass is 1/2 inch. Even 1 inch is too thick as it allows the trapped ...
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2 votes
2 answers
129 views

When it's smokey out, why does more smoke get into the house in the mornings and evenings?

We've had thick smoke outside our home for several days now due to the fires on the west coast. We're doing what we can to filter the inside air and keep excess outside air from coming in (covered ...
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0 answers
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Is it a good idea to blow hot air through drywall?

I have a small room with no windows and I want to cool it down. A friend of mine suggested me to get a portable AC, create a hole in the wall (drywall) and put the exhaust hose through the wall. This ...
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-1 votes
2 answers
140 views

How to Fix Central AC Bringing in Outside Air - Smokey outside

We are located in San Francisco Bay area. There's a huge fire almost every year. We recently moved to a house where central AC brings in smokey outside air. We have 2 young children and I'm worried ...
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1 vote
1 answer
59 views

redirecting some air from outdoor A/C compressor into the attic to cool it down

I can't find any info on this question, and this might be a stupid idea... but anyway: The temperature in the attic is ca. 130F, 3pm, outside temperature 90F. ( Florida, 17y/o house ) Can I direct/...
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1 answer
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Air Flow using Vacuum and High Air Pressure Air

I am investigating container homes. Something about the modularity appeals to me. Regardless, I am thinking about one of the challenges that they face is to get adequate air flow without cutting ...
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-1 votes
1 answer
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Creating positive pressure to keep secondhand smoke from seeping into a studio apartment

I just moved into a 325sf senior apartment and now live in a gas chamber. The second-hand smoke from the upstairs neighbors seeps into the apartment 16 hours a day through gaps around the shoddily ...
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Should I move an HVAC vent to the ceiling or on the opposite interior wall?

The below picture shows the current position of the vent (the white area over the sink). The blue patch above the toilet is a small window. The plan is to relocate the bath tub and position it along ...
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1 vote
2 answers
51 views

Is it correct for air to flow into home from under an addition?

I have seen multiple houses sitting on concrete basements or slabs where additions were added on to the house in the 1970s-80s and air flows directly from under the addition to inside the house. The ...
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0 answers
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My DA250C porter cable nailer wont fire suddenly. It just releases a bit of air?

Porter Cable DA250C 15 gage finish nail nearly new just stopped firing? Just releases a bit of air.
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0 votes
0 answers
1k views

Help reroute cold air return

I am working on opening up space between my lobby (on the right side of the wall) and the dining room area (on the left side of the wall). The section of the wall that is used as cold air return ducts ...
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-2 votes
2 answers
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How would you cover this vent?

I'm moving into a new home and one of biggest pet peeves I have is this vent in the living room. Any ideas for how to cover it? Do they have invisible frames that I could use instead? Any ideas/...
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7 votes
2 answers
307 views

Is Complete Ductwork Required to Start the Condensor?

I'm in the middle of rebuilding my entire AC system. I've got one 14" return and two 8" supplies hooked up to the blower (on a 2 ton system). I plan to add much more, but for now I want to ...
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0 votes
1 answer
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Should I replace whole system or just leaky component? [closed]

The HVAC guy who screwed me (edit: i do believe he tried to find a leak the first visit, but the second visit he didn't seem to be bothered) on a refrigerant refill (see my other posts) is ...
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1 vote
1 answer
1k views

Evaporator Coil Cold, but Not Ice Cold

My temperature difference between my supplies and returns is only around 5 degrees F. I opened up my air handler to see if the evaporator coil was dirty, and it was clean -- but running the outside ...
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