Mismatched HVAC equipment

[David A. Andersen]

1/2 way through.

Worth the time!

[Brian E. Kelly]

Originally Posted by sparksnmore

On the other hand, a mismatched system could possibly be more efficient. It's just that nobody knows because it hasn't been tested and is not listed in the book.

Naturally, any manufacture wouldn't approve of using a competitor's equipment and loosing sales.
Years ago an "A" coil would outlast three condensing units but not anymore.

Generally speaking, here in AZ mis matched units are an Old Air Handler and a Newer Condensing Unit... There is no way that they will be as efficient Matched Newer Units..........

Some things do not need to be tested...

[Gary Reecher]

Mismatching systems can seriously affect system performance and efficiency. One also has to be careful even with equipment with one manufacturer. One coil may work perfectly in cooling only mode but could cause high head pressures when in heating mode if a heat pump.

Here are two pdf files I have three more. One from Carrier, Bristol compressors, and ARI but they exceed the 250 byte files size for upload.

[Jay Cool]

It may always be a good idea to explain that in most cases HVAC equipment mismatch is Ok but there can be compatibility issues that are best confirmed.

[David A. Andersen]

Originally Posted by Jay Cool

It may always be a good idea to explain that in most cases HVAC equipment mismatch is Ok but there can be compatibility issues that are best confirmed.

It may always be a good idea to keep your mouth shut in cases like this!

Confirmed?
I guess you're one of those "call it out because I don't know what I'm talking about" guys?

[James E. Braun, CMI]

Be nice, David!

[David A. Andersen]

Yea your right.

Need to be nice to the new guy...

Just got done with a 70 page HI Report follow-up inspection where the HI called out everything except his mothers fallen arches!

"Recommend further evaluation". Every darn thing!

3 HAVC units failed the 20 degree drybulb test with a vacant house 90 F, 87% rh.

You know I'm hot under the collar!

[Christopher Currins]

Originally Posted by dandersen

Just got done with a 70 page HI Report follow-up inspection where the HI called out everything except his mothers fallen arches!

"Recommend further evaluation". Every darn thing!

3 HAVC units failed the 20 degree drybulb test with a vacant house 90 F, 87% rh.

What did you write, instructions on how to repair everything?

[David A. Andersen]

No, what was actually broke and what was not. What is normal wear and tear and what actually had to be replaced (not evaluated further). I was there to do the rest of his job!

That the R-Value of refrigerant pipe insulation does not effect the performance of the HVAC equipment...

I never tell anyone "how" to fix something. Just make the problem go away!

If they want a brand new house, go buy one (good luck with that).

When you buy a used car, you don't always get new tires, but the ones you get must hold air and be safe to operate on. Simple as that.

I am so sick and tired of "scared" Home Inspectors this week! They can't make a decision and are afraid of their own shadow to a point they make everyone's life miserable from diarrhea mouth!

It took three people to sit down and read this report and figure what needed to "really" be taken care of. A Real Estate Broker, an Engineer and a Home Inspector to "translate" for them.