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"Could this temperature difference indicate a leak in the return ducts?"

Or could this delta indicate a chimney effect within the supply?

Why not have a blower door test run on the structure...

flemingljr

Yes with high school mathematics you can do an ACCA Manual J calculation, albeit you will not be able to make meaningful inferences from the results owing to the lack of validity of...

VAQuestion; If you live in Fairfax County then your existing equipment was sized by a Manual J calculation. It is a jurisdictional Code Requirement that a mechanical permit be obtained on all new...

KatFarmer;

One “safe” gauge of reliability is the length of warranty provided by the equipment manufacture. I work for a TRANE shop and we install products that span the full spectrum.
...

siggeorge;

You should have received the Owners & Installer's Guide for your unit from your TRANE Dealer. These documents are clearly labeled that they ARE TO BE GIVEN to the OWNER at time of...

After searching through this thread I’ve become concerned that the spirit and intent of the actual issue at hand hasn’t been taken to heart. The adverse health effects caused by ozone depletion are...

Only your jurisdictional inspection agency can answer this...
Albeit we always install per manufactures specification and requirements, make sense?

AW;

Where are you located? What time of year was the home built?

You've received excellent advice about a concern that your HVAC system was run during the construction of your home. This is a...

Tigerdriver;

You’ve already received good advice…
Check with the local BBB, bad news travels fast and far.

That said, since you are looking for Service rather than Sales I strongly...

Hhomeowner;

Have you discussed this situation with your Carrier Contractor?

If so what was his/her reply?

In order to obtain meaningful support from this forum you might consider providing...

Amy;

Owing to the age of your furnace, it is now at its limits of the intended design life. To this end you need to be very concerned about the integrity of the heat exchanging unit within the...

Mchild;

We receive this question frequently, thus in a nutshell, the “S” is an abbreviation for Seasonal (an average) adjustments of EER.

EER: (Energy Efficiency Ratio) The ratio of the...

Sue;

Your wish is my command:

"I just wish I could see into the future as far as availability is concerned. Plus my contractor prefers R22."

Look no futher than the Authoritative Source:
...

Sue;

In answer to your question: “Would that be because the units they sell (Rheem) are rated differently?”

All residential air conditioning units in question are rated by the Air-Conditioning...

Bayan440;

Because of Florida's operational expense you might want to get a quote on a 2TWX5030A1000A for comparison.

Important Note: Since

“Existing electrical, refrigerant, and...

Frankt;

From your all your previous posts it appears that this is a retro-fit into an existing system, correct?

If so have you enlisted a professional competent with at a minimum ACCA’s Manual...

Airbuck;

I recommend that you only provide information from an authoritative source. Unfortunately far too many have vested interests and hidden agendas that cloud the waters on the HCFC phase...

Please do consider open and sincere communication with the technician at the time. You could save yourself and others from possible unwarranted trepidation.

Case in point, if you arrive at a...

What does the TXV do? It replaces a fixed orifice valve which is only capable of a static flow of refrigerant into the evaporator (under any given system temperature/pressure scenario). As...

pioneerbear;

Thank you for your input on this forum, I personally wanted to say that I'm sorry you had to suffer the abuse that comes with trying to understand a closed industry. I didn't dare...

Please allow me to preface the following reflections by honoring Don Sleeth with a deep felt appreciation for the wonderful mission he has accomplished by automating ACCA Manual J Seventh Edition...

Lafutura;

While everyone thus far seems to be focused on their own perceptions of merit, please allow me to cloud the waters.

More important than the “brand” of unit is the connection to the...

Cwtdallas;

It appears that you’ve invested some initial research into this issue, thus I’ll endeavoring to steer you in an appropriate direction based upon inferences you’ve drawn thus far.
...

“They will install only one return” mlbussert, I assume that “they” is a qualified HVAC Contractor, if so “they” would have designed the air distribution system to meet the required manufacture’s...

bnbhoha; As BaldLoonie tactfully mentioned, please no dollar amounts... Also please help the Forum help you: What is the climate of your residence, it is an important variable. Does Air Conditioning...