Author Topic: HVAC (heating and AC) question (Read 80505 times)

YitzyS · « **Reply #340 on:** December 22, 2021, 06:37:55 PM »

Quote from: sguitarist18 on December 22, 2021, 05:48:25 PM

My contractor did this. Did I mention it's in an uninsulated outside wall, when we had demo'd the room to the studs? When I asked him about it, he said that the studs weren't big enough for the official way the insulation is supposed to be installed. Didn't explain why he didn't a) put in whatever insulation he could fit, or b) discuss with me the option of extending the studs so there'd be more space.

Sorry for the OT rant.

Q: What does sguitarist18 and the United States have in common?
A: They both have a wall that lets in anything that wants to come.

(Sorry, I was trying a little too hard...)

yelped · « **Reply #341 on:** December 22, 2021, 07:25:04 PM »

Quote from: sguitarist18 on December 22, 2021, 05:48:25 PM

My contractor did this. Did I mention it's in an uninsulated outside wall, when we had demo'd the room to the studs? When I asked him about it, he said that the studs weren't big enough for the official way the insulation is supposed to be installed. Didn't explain why he didn't a) put in whatever insulation he could fit, or b) discuss with me the option of extending the studs so there'd be more space.

Sorry for the OT rant.

Ouch. I feel for you. That must be very difficult to live with.

Bailbino · « **Reply #342 on:** August 01, 2022, 11:38:30 AM »

can anyone recommend an A/C Installer in Brooklyn who is able to get these government rebates?
any advice would be greatly apprechiated

nucheiner · « **Reply #343 on:** March 13, 2023, 03:37:40 PM »

How big does the cavity an HVAC return need to be? I have an enclosed cavity (behind sheetrock, no duct work) that runs from the system in the basement to the second floor and splits from there to three bedrooms. I'd like to move this cavity to run between the studs instead. Can this be done by just ensuring the replacement cavity has the right amount of square inches? Better off running ductwork?

aygart · « **Reply #344 on:** March 13, 2023, 05:13:53 PM »

Quote from: nucheiner on March 13, 2023, 03:37:40 PM

How big does the cavity an HVAC return need to be? I have an enclosed cavity (behind sheetrock, no duct work) that runs from the system in the basement to the second floor and splits from there to three bedrooms. I'd like to move this cavity to run between the studs instead. Can this be done by just ensuring the replacement cavity has the right amount of square inches? Better off running ductwork?

At least in theory this can even be to code.

mercaz1 · « **Reply #345 on:** April 19, 2023, 07:49:04 PM »

anyone have a reliable HVAC company who services the five towns

I need to get a new central ac system

satturn · « **Reply #346 on:** April 20, 2023, 03:37:20 AM »

Quote from: mercaz1 on April 19, 2023, 07:49:04 PM

anyone have a reliable HVAC company who services the five towns

I need to get a new central ac system

https://www.hvacsage.com/
718-471-6836

Galitzyaner · « **Reply #347 on:** April 30, 2023, 03:09:01 PM »

BUMP ↑

KSMH · « **Reply #348 on:** May 05, 2023, 06:43:03 PM »

Have r22 system no clue if anything was mixed into it in the last 20 yrs.
Seems to be leaking a little, but there's still pressure in it. The charging ports were left uncovered and are dirty.

main questions
1. Should I use RS 44b or Mo99 or something else.

2. Does this look like a reliable source https://www.airhvacrefrigeration.com/product/r22-replacement-rs-44b-r453a-the-newest-r22-drop-in-replacement-kit-a1.html?lang=en#
or https://frosty-freezeacproducts.com/products/r-22-mo99-replacement-r438a-same-as-mo99-5-lb-stop-leak-proseal-system-seal

3. Should replace the valve cores? (Using a tool that doesn't require depressurizing https://www.amazon.com/gp/aw/d/B08FBVYD28)

4. Would you do a sub-heat (no txv) calculation or just check if it's getting colder. I don't want to overfill.

5. The r22 replacement freon requires liquid filling on the low pressure side. Can I use this https://www.amazon.com/gp/aw/d/B004RIDG02/

6. Are leak stop products worth it?

7. Any idea of the quality? I don't want to buy a full set of high-end tools. https://www.amazon.com/Lichamp-Manifold-Refrigerants-Charging-Evacuation/dp/B07WNDG4CR?

Galitzyaner · « **Reply #349 on:** June 05, 2023, 01:52:34 PM »

It seems interest isn't that great in this topic at the current time.
But I'll try my luck again.

Anyone have a Gree split system? Would appreciate to hear your satisfaction.

TIA

Alexsei · « **Reply #350 on:** August 11, 2023, 02:27:20 PM »

The filter in my air handler is in an extremely difficult place to reach. Is it okay to completely remove the filter from the air handler and instead install a filter at the return?

WayBackMachine · « **Reply #351 on:** August 11, 2023, 03:20:40 PM »

Quote from: Alexsei on August 11, 2023, 02:27:20 PM

The filter in my air handler is in an extremely difficult place to reach. Is it okay to completely remove the filter from the air handler and instead install a filter at the return?

no, it will dust up the system

Alexsei · « **Reply #352 on:** August 16, 2023, 04:33:47 PM »

Quote from: WayBackMachine on August 11, 2023, 03:20:40 PM

no, it will dust up the system

Why do we see some systems designed like this ?

shnu · « **Reply #353 on:** August 17, 2023, 06:05:08 PM »

Anyone ever try installing a split unit in their sukkah? Wondering if it actually helps or not strong enough to do much

yungermanchik · « **Reply #354 on:** August 17, 2023, 06:14:38 PM »

Quote from: shnu on August 17, 2023, 06:05:08 PM

Anyone ever try installing a split unit in their sukkah? Wondering if it actually helps or not strong enough to do much

I've done a window unit. see here for Pics. Definitely not as effective as in a house but with a mat, (not sure about bamboo poles) it does help. I'd imagine a split would help too if it's directed down. Up, though, probably not too much.

WayBackMachine · « **Reply #355 on:** August 17, 2023, 07:46:01 PM »

Quote from: Alexsei on August 16, 2023, 04:33:47 PM

Why do we see some systems designed like this ?

its possible I misunderstood your question
the filter must be between the intake and the unit, where it is sucking in, not where its blowing out

Alexsei · « **Reply #356 on:** August 17, 2023, 08:21:08 PM »

Quote from: WayBackMachine on August 17, 2023, 07:46:01 PM

its possible I misunderstood your question
the filter must be between the intake and the unit, where it is sucking in, not where its blowing out

The way I understand my system is designed, and I have no HVAC experience.

There's a return vent in the ceiling that is feeding into the furnace, at the bottom of the furnace there's a slot for the filter cassette, below that there's a duct that takes the filtered air to the air handler, now what I'm trying to do is get rid of the built in filter and instead place a filter in the return duct.

My understanding is that you can never have two filters as it would cause the system to be overwhelmed, but I also understand that the way it is now there's no filtering for the 15 or so feet of ductwork between the return and the furnace, vs if the filter is at the return.

So I'm not sure what the purpose of having the filter built in is.

CountValentine · « **Reply #357 on:** August 17, 2023, 09:08:17 PM »

You only have one return?

Alexsei · « **Reply #358 on:** August 17, 2023, 09:10:48 PM »

Quote from: CountValentine on August 17, 2023, 09:08:17 PM

You only have one return?

Correct, I guess te system is designed in case there are multiple returns?

CountValentine · « **Reply #359 on:** August 17, 2023, 09:13:50 PM »

Quote from: Alexsei on August 17, 2023, 09:10:48 PM

Correct, I guess te system is designed in case there are multiple returns?

If there is only one return I don't why you could not put it anywhere you want in the return (beginning/middle/end).