energy star

yeah, guess so. I was just looking at past threads.

One of my firsts tasks at a new job was to go up into an attic (Dover NJ) and remove the 140 degree links and replace withe 160 degree. The 140's were melting from the heat in the attic. HOT!

What kind of info are you looking for?

Phillip, when you tested the 27 yr old unit in post # 1, did it seem to operate ok? What was the outside temp?

I bet you have been getting a new nozzle each year.

Was this the larger or smaller line?

What ever happened? Was the fan running in the correct rotation? When he pulled the amp reading was the compressor included?

Nice. Very safe. Don't care for the paint by the furnace.

Evap 3.5 ton, A/C unit, 4 ton = not good.

Hello..................hello......................helloooooooooooooooooooooooooooooooo

Oh, I'm sorry dude. Not from me. You need that oil combustion air, thats hard to find in these parts.

[:-taped]

My mistake.

Fraid not, no nailing it there. He ended up with a 4'' round duct. Took room volume into account. You asked for duct size for needed for "outside " air. MTL had it first, but kinda oversized it, when he went with 8".

You can not answer the question correctly then. So this quiz will not benifit nor teach anyone. It will merley show an attemp at understanding a need but have no regard for it being correct. I thought that was the point. OK I willl lay off the quiz questions. (try)

It is not a basic question. To do in correctly, which I would think a "quiz" question would want you to do. You have to know the spec OR tell us how it is configured on-site, so we can tell you if it is adequate. You may be able to have a different size opening depending on where the "hole" is

To be correct. We must know where he wants this combustion duct run. Vertical up through the roof? Or out the sidewall. Does he want one or two openings? 20 square inches, 12'' from ceiling, if he wants one opening.

"There are several correct answers. They depend on which combination of the following factors the installer chooses to incorporate: Engineered installation. Mechanical installation. Passive installation." Could you explain the difference between each of these?

I think he wants all combustion air to come from the outside? (At leats thats what the home wants)

You need a HVAC quiz section. I did not know we would have a pop quiz as such the way that was posted. To me, I thought I needed to complete the answer. I probably don't need to tell you the free square area is different if it's from a larger room in the house or from outside. I will learn the members in here after a while. I never wanted to to step on anyones toes.

That is what I'm saying.

That is telling us, yes he needs more combustion air. But, the openings can be of different size if he gets the air from outside or a bigger room in the home. And, is he going to tell the home how many square inches of free air space they need for the furnace in that room?

Are you going to get the combustion air from a larger room in the home or from outside? You need so many square inches per 1000 BTU.

I understand. I was a bit confused because in the original post you were talking about "insulation?'' I picked up on the return in the garage. A jumper duct or a transfer duct typically does not connect to anything. it is merely a duct with a gill on one end with a duct going to another room with a grill on that end. What you have is a return grill in the garage ceiling going directly to the return plenum. It may have been installed to serve as a supply grill but was hooked up to the wrong side of the HVAC system. All in all, if the room has a large enough door to drive a car into this space, I would send a certified letter to someone letting them know that a dangerous environment exists. You better c.y.a. it as best you can.

I'm not clear on this. Are yoy saying the air handler/furn is in the house and the garage has a return it? Or, are you saying the the HVAC unit is in the garage with a grill cut in the plenum, with another grill in the garage wall goin to the return system in the house? If they can pull a car in that garage, start a lawn mower or any type of engine in the garage with a return grill or a fresh air duct in the same space, carbon monoxide poisoning would be a concern of mine.