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Hello,

I have a Carrier split system (a/c only - FV4BNF002/24ACB424A003). I changed the Dip Switch setting for CFM from "Nom" to "Hi" (there are 3 options: Lo, Nom, and Hi). The Hi setting...

This article recently appeared in The Economist:

Keeping cool and green

Innovations in air-conditioning systems mean cooling down buildings is going to require less energy

“AN ABSOLUTE...

Thanks Gary, that helps alot...so even though my understanding of SEER is a little confused, I was in the ball park with 1.5kw/hr...though it looks like 1.8kw or so would be a closer to reality after...

Hello. I would like help figuring the cost per hour to run my central A/C.

I got a new 16 SEER, 2 ton Carrier air conditioning system installed last year. I am trying to figure out the cost per...

I can't believe that people actually fall for Edenpure. You get the exact same efficiency from a $20-$50 ceramic heater.

As far as saving money on space heating, while not for everyone, I love to...

I had the exact same experience!!! I got that same exact 2 ton Carrier equipment installed this spring and got nervous about the SEER because of that 14 SEER yellow sticker on the compressor unit.
...

I hope you learned how to drywall in HVAC school!

...joint compound aint all that different from mastic :)

I have an AH in my attic and to prevent the condensate line from clogging I put a mixture of 50/50 bleach and water down my condensate line every year (I read somewhere that you should do that). If...

I got a new A/C system installed this spring. After getting a pretty bad install, I started doing some research on the right way to do things (I know, I should have done all that research first).
...

I got a Carrier Comfort Series 16 SEER system installed in the Spring. It seems to be good equipment so far. With the contractor I worked with, for some reason it was about the same price for 16 SEER...

Unfortunately, Carrier provides a cheap blue filter that a bird could fly through with their air handlers and they say other ones will constrict air flow too much.

Ok, searching through older threads this is what I found:



-AND-



Are these descriptions correct?

What other details on the Tstat would you need to know? This is a very common Honeywell 5-2 that goes for $ at big box stores. I agree with you that it is doubtful that it has any learning capacity....

I have a common Home Depot Honeywell 5-2 thermostat and was wondering if someone could explain how the cycle time settings work.

The thermostat has a configuration setting for "Cooling Cycles Per...

CAREFUL! I wouldn't be surprised if the Mods around here consider talking about changing your own fitler "DIY".

They must have a low opinion of the work they do if they think giving some basic...

I just had a new Carrier Comfort Series system installed this spring. My set up is very simple - a 2 ton, cooling only. I live in a smallish, older rowhouse (built 1947). My system has an overall...

Ok, cool

I think I read in Popular Mechanics or somewhere that a level compressor actually affects efficiency up to like 5%. Could that be true?

I have read a compressor unit should be set level, but can't find a detailed explanation why. Just curious.

My Carrier user manual says the compressor manuf specifies it must be level. Would it...

Thanks for the insights Dash. This is a small 2 ton system with ductwork that was retrofitted into my row house (built in 1947). It has a single, big return on the ceiling. The return opening is...

My new 2 ton carrier Comfort Series comes with a washable spun fiberglass air filter. It has a metal frame.

Do you pros have any opinions about the Carrier factory filters? I am just concerned...

Too many things were wrong about this install guy:

-He didn't know the tonnage of the unit he was installing and didn't hardly know how to determine the tonnage based on the info printed on the...

Really?? $x for a 2 ton, 16 SEER Carrier Comfort Series seems too low? Keep in mind this is cooling only (i have hot water radiators for heat) and it was a change-out so duct work was already in...

Irascible - I appreciate your additional insight. You made me feel more at ease by saying a relatively cool liquid line is good.

One of my purposes for posting on this board to see if any of you...

The guy who did my install seemed just out of trade school (probably a C student) and I think checking for proper air flow was way beyond his IQ. Aside from this whole refrigerant charge thing, I was...

UDarrell - thanks for the info.

So you are saying you can get a ball park subcooling measurement by measuring the temp of the liquid line subtracted from the temp of the air blowing up from the...

Thanks for the additional replies. For my own peace of mind and greater understanding, I wish I could wrap my head around this subcooling thing.

If my pressure was 245 psi when it was like 79...

Thanks for replying.

Ok, so if the temp was 78 -80 when that 245 psi reading was taken, does it sound like I'm low on refrigerant?

Outdoor temp was about 78 - 80 when those readings were taken.

Do pressure measurements vary based on the outdoor temp?

Hi all. I am trying to figure out if my HVAC company is a bunch of idiots or if I just misunderstand subcooling.

For my small Baltimore rowhouse I just got a newly installed 2 ton, 16 SEER split...