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Type: Posts; User: keithonline

1. ## Thread: Max stack temperature = maximum efficiency

by keithonline
Replies
29
Views
3,275

The answer to your question depends on the size of the flame. It's directly proportional to the area. A much larger 2200 flame will move more heat into an equally large HX than a very small 3000...
2. ## Thread: Max stack temperature = maximum efficiency

by keithonline
Replies
29
Views
3,275

### I'm sorry, but all thermodynamic equations say...

I'm sorry, but all thermodynamic equations say otherwise. Look at the extreme to see my point. If you backed the fuel down to the point where you just had a flicker if a flame, say like a candle,...
3. ## Thread: Max stack temperature = maximum efficiency

by keithonline
Replies
29
Views
3,275

### Thanks beenthere. Would you say the typical...

Thanks beenthere.

Would you say the typical home Beckett style burners are low pressure at ~100 psi? My experience is that the setting typical oil service guys put the burner on, can be leaned...
4. ## Thread: Max stack temperature = maximum efficiency

by keithonline
Replies
29
Views
3,275

5. ## Thread: Max stack temperature = maximum efficiency

by keithonline
Replies
29
Views
3,275

### Among other things, I've designed a few heat...

Among other things, I've designed a few heat exchangers.

I'm coming to the conclusion that a sufficient technical answer will not be found on this site. By sufficient, I mean scientifically...
6. ## Thread: Max stack temperature = maximum efficiency

by keithonline
Replies
29
Views
3,275

### I concurr. Therefore to reduce waste heat, the...

I concurr. Therefore to reduce waste heat, the fuel rate should be dropped until the stack temperature drops to a reasonable level to maintain draft and not condense. However, regardless of the flow...
7. ## Thread: Max stack temperature = maximum efficiency

by keithonline
Replies
29
Views
3,275

Please explain. If your stack temperature rises, then your HX is hotter, therefore you get more heat out. How could it possibly be more efficient to run at a lower stack temperature for a given fuel...
8. ## Thread: Max stack temperature = maximum efficiency

by keithonline
Replies
29
Views
3,275

### Rich is bad, understood. So why not just keep...

Rich is bad, understood. So why not just keep leaning it up until temp starts to drop? Target max stack temp which will be lean for the real world reasons you mention, but the max measurable stack...
9. ## Thread: Max stack temperature = maximum efficiency

by keithonline
Replies
29
Views
3,275

### Max stack temperature = maximum efficiency

Could someone with sufficient scientific and practical knowledge explain to me why one would not adjust the air intake on an oil burner, with a set nozzle size, to provide the maximum stack...
10. ## Thread: Is tax credit extension for appliances in the new tax bill congress is passing?

by keithonline
Replies
0
Views
368

### Is tax credit extension for appliances in the new tax bill congress is passing?

Does anyone know if the latest bill going through congress includes having the tax credit extended through 2011 for efficient appliances? I don't know where to go to read the bill.
11. ## Thread: Variable speed compressor in a heat pump.

by keithonline
Replies
6
Views
1,449

### Variable speed compressor in a heat pump.

Does anyone here know if there is any mfg that makes a variable speed compressor for a residential (or commercial) heat pump (or AC) unit?
12. ## Thread: Can I utilize a comfortnet Goodman DSZC18 unit for a zoned system?

by keithonline
Replies
17
Views
1,577

### According to that comfort1 site, the dP control...

According to that comfort1 site, the dP control on most ECM blowers should adjust. Wouldn't a separate zone control board that opens/closes the dampers be sufficient, and you still have all the...
13. ## Thread: Can I utilize a comfortnet Goodman DSZC18 unit for a zoned system?

by keithonline
Replies
17
Views
1,577

### Thanks for your insight. I saw that Rheem was a...

Thanks for your insight. I saw that Rheem was a member of ClimateTalk.org, so I was hoping their system might be more apt to allow zone controlling. I guess buying equipment and installing later...
14. ## Thread: Can I utilize a comfortnet Goodman DSZC18 unit for a zoned system?

by keithonline
Replies
17
Views
1,577

### Thanks for the help. In a rush to get the...

Thanks for the help. In a rush to get the equipment by end of year.
Does the Rheem Comfort Control system have the same limitations on zoning as the Goodman ComfortNet?
15. ## Thread: Can I utilize a comfortnet Goodman DSZC18 unit for a zoned system?

by keithonline
Replies
17
Views
1,577

### Can't find an installer that knows how

I was hoping to find an expert that I could hire locally to do a trick installation, but no luck. I'd like to find out if there's a way to have the comfort net be controlled by feedback from the...
16. ## Thread: Hydro Air system

by keithonline
Replies
13
Views
3,923

Beenthere- Glad you mentioned the issue about furnace drying out the air. I always wondered why that was said. With no mass transfer between the supply and return, how could it dry? Infiltration...
17. ## Thread: Can I utilize a comfortnet Goodman DSZC18 unit for a zoned system?

by keithonline
Replies
17
Views
1,577

### Can I utilize a comfortnet Goodman DSZC18 unit for a zoned system?

I'm about to procure a 5 ton Goodman heat pump system when I started looking into the controls. I looked at the CTK01AA thermostat and it appears that I will not be able to control my 3 ducted zone...
18. ## Thread: Best air handler with ECM for hydro air

by keithonline
Replies
17
Views
9,416

### How are the Ecologix or Summerair, or First Co...

How are the Ecologix or Summerair, or First Co units for maintenance, like getting in to clean the coils, etc? Also, if you go with an Ecologix or Sumemrair and put an AC coil after it, would that...
19. ## Thread: Oil heat AC in CT: Heat pump and two stage

by keithonline
Replies
0
Views
539

### Oil heat AC in CT: Heat pump and two stage

I'm looking to upgrade my orig equipment in a 1986 colonial. 2600 sf, plus some finished basement. 3 duct zones. One second level, 2 main floor. Going to supplement great room zone with a hitzer...
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