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Steve, they drop to 65 on the inside. Outside, it will be 20's or 30's. Not too bad, but not Hawaii.

Teddkidd, my gas and electric cost average $100 a month total. According to Duke Energy's...

Thanks again, Teddkid, Beenthere, and Gravity. I will take some of all your advice, and the debate has been instructional.

I will see if I can lower cfm, first, just to 1000 from 1033, and then...

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Thanks

In this case and for my specific application, I agree with Gravity, even over Beenthere and Tedkidd, both of whom I respect very much and have learned a lot from.

The reason is that I like to do a...

No, I just use the 2 inch pleat. What is written on it, is "Flanders 40 Prefilter". It was probably intended to be a part of a commercial system filter bank in front of bag filters. But it is just...

Thanks, I did not know I could do that. It sounds like good advice.

I understand why locked into high fire would be economical, but why do I want to lower the cfms? Just wondering what the...

I don't know if these filters have a merv rating. I use a 2 inch pleated Flanders 40 prefilter. I figure two inches is going to be better than one inch pleats. It should not be too restrictive used...

Today I ran a system check on my furnace for the first time, a Carrier 80% two stage (54k btu output on high and 36 k output on low, oversized I know, but about as small as I could get, and probably...

I think I found the problem. My wife replaced the filter two days ago, and because we use 2 inch pleats, it is a tight fit. So she installed it behind the filter box instead of in the filter box,...

Two years ago I put in a carrier dual fuel system. Uses infinity thermostat. Has performed well.

Yesterday my son noticed the thermostat said "system malfunction". When I pushed the button to get...

Thanks everyone, for the great advice. I was skeptical whether Mechanical Engineering consultants would have the sort of hands-on knowledge that I get from HVAC mechanics, but if you all are...

Thanks everyone, for the great advice.

It looks like the size will be 275 tons. It is for a 100,000 sf building in Georgia. That is what is there now, and I thought about reducing the size a...

When I have to make a big decision to make, spending $200 to $300k, what is the best kind of consultant to use? This site is great, and I greatly appreciate the opinions I get here, but occasionally...

Yes, I probably should have given that information.

Between 250 and 300 tons.

I need to replace an old chiller. It is designed to be an indoor water-cooled chiller. I am curious if it matters whether it is centrifugal or screw type.

What are the advantages and...

Thanks, that is a great explanation. I appreciate you following up on my comment with this advice.

Well, I understand that it is a 20 ton unit made in 1993, anyway.

I could not follow most of the rest of the posts.

It is working well, and like I said, it is pretty quiet. It is getting old...

This chiller, it looks like it is an aircooled chiller.

How does it compress the refrigerent? It does not make the typical chiller sound I am used to hearing, much quieter.

How old is it, and...

Attached are two photos of labels with model number and serial numbers.

Would anyone be so kind as to tell me the age and tonnage of these condensing units?

I appreciate having this forum to...

Thank ya'll very much!

Can anyone tell me the age and tonnage of the Lennox unit in the photo?

Thanks298921

Good afternoon everyone.

Attached is a photo of a unit nameplate. Can anyone tell me how many tons of cooling this is? I am guessing it does not do any heating.

Model #MPS050AE4DV1CYBV...

Thanks all, for the lively debate and information on this question. Sounds like a number of opinions out there, and a number of variables to consider.

In this building, the boiler actually can't...

I am a Southerner and do not have a lot of experience with boilers and steam heat or hot water heat, but recently I went to inspect a building for general operating issues--not HVAC--up north in a...

At one building, we are replacing an old rooftop gaspack unit, 7.5 tons cooling, 90,000 btu heating.

We are being quoted a York ZF090N10N2AAA5. They are replacing a York with a York, like for...