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A friend asked me to take a look at their oil burning furnace. I have worked on exactly 2 of these in the past ten years, as our furnaces around here are all LP, Natural, of electric.
I was...

What is a good way to check your gauges to know they are reading correctly? I usually check them against each other to make sure they read the same against the same pressure, but how do I know if...

I will check back with them tomorrow to see if the pilot was causing any problems.

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The reason I am confused is that there is about 10 foot of uninsulated duct between the evap coil and the furnace and it is not sweating. I thought that would rule out high humidity in the furnace...

This is an old natural draft furnace. Is it possible that the hot outdoor air would travel back down the flue and condense on the walls of the cold heat exchanger?
I did notice the pilot was on...

Went to a house today that complained of water dripping from the furnace. The setup is an older horizontal gas furnace with a evap coil on the return side. The water is dripping from the heat...

I see some of the distributors here are now paying for recovered R22. Not sure how much, as it depends on purity, but it sure beats having to pay to take it to be recycled.

Just curious, how much are your distributors charging for R22?

I bought a 30# cylinder today for $.

As you learn how, pay attention to the "percentage" of the total system charge you are adding. For example, a system that holds 14 pounds will require quite a bit more refrigerant to lower...

Same coils here. All EDD's. I would like to see at least a little labor compensation. I talked to a couple Tempstar dealers and their distributor was working on the same thing. I would think they...

Well, I figured I wasn't the only one having problems. Found another one this past Saturday. This was the start of its third cooling season.
We haven't gotten anything for a labor compensation,...

We have carried Heil products for about 10 years now and have recently been having a BUNCH of evap coils with leaks. Some are right at the 5year old mark, while others are only on their second...

What is the problem?
Are neither furnaces firing?

The 16x25 hole in the furnace is big enough, but the 16x25 filter has a much higher resistance, so the FILTER needs to have a larger area. The above described transition will accomodate that larger...

We have sold Heil exclusively for about 10 years now.
Started seeing a lot of evap coil leaks this summer on coils right at the 5 year old mark. Also change an occasional heat exchanger on the...

Bringing in fresh air will be a necessity with a foamed in house. Everything seals so tightly that the air you breathe, moisture from showers/cooking, vapors from the carpet and construction odors...

I would make sure the humidifier is getting good run time. If the humidistat is bringing the humidifier on properly, even when the furnace burners are off, the humidity level will eventually rise. ...

If you can find them, some of the older Lennox furnaces/air handlers used a clear glass tube fuse. It is different in that it has a couple metal "ears" on the one end that allow it to twist into the...

I would agree with the oversized pipe being a problem. Depending on how high the vent is running and how much of an offset there is a 5" B-vent is probably plenty, maybe even a 4" would work. Check...

I edited my post from before. I realized my infiltration was off. 1800 main floor plus about half of the basement would equal 2809 ft2 X 10 foot (9'ceiling + 1' joist space) =28090 ft3.

Code...

Correct. Ground source heat pump, open loop (pump and dump) system.

It looks like I will need 33,000 BTu sensible/6,000 Btu latent, and 46,000 btu heating.

Does that sound about right for...

Correct. 1800 square foot main floor and 1800 square basement. There will not be insulation under the basement floor.

What other types of wall insulation do you recommend to get better than...

Edit. After posting that I realized my Infiltration was a little off. My volume is 2809 which makes my total 2580 BTU. That would bring my sens total to 33,063.

Ok. I changed my summer TD to 25 and came up with about 36,000 sensible. Looks like the Hydron 3-ton will give 39.3 BTU Hi and 29.6 BTU low cooling.

The main floor square footage is 1873. The...

I'm pretty new to doing load calculations so I was wondering if anyone would be willing to give me some guidance.

75deg winter TD, 30deg summer TD near Omaha, NE

I am working on a 1800 ft2...