This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Why can oil furnaces operate at efficiencies between 80 and 90 without condensing water in the heat ... (Read 89 times)

@Brianna17

  • Hero Member
  • *****
  • Posts: 550
on: Jul 26, 2018
Why can oil furnaces operate at efficiencies between 80 and 90 without condensing water in the heat exchanger or vent?
 
  What will be an ideal response?

Question 2

Why are most furnaces manufactured today either Category I or Category IV furnaces?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

nikmaaacs

  • Sr. Member
  • ****
  • Posts: 335
Reply #1 on: Jul 26, 2018
Answer to Question 1

The combustion products contain only half as much water as combustion products from a gas furnace. So the dew point of the combustion gasses in an oil furnace is lower than in a gas furnace.

Answer to Question 2

The venting materials for Categories II and III are costly.


@Brianna17

  • Member
  • Posts: 550
Reply 2 on: Jul 26, 2018
Great answer, keep it coming :)

Mochi

  • Member
  • Posts: 300
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).

Did you know?

ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.

Did you know?

Less than one of every three adults with high LDL cholesterol has the condition under control. Only 48.1% with the condition are being treated for it.

Did you know?

You should not take more than 1,000 mg of vitamin E per day. Doses above this amount increase the risk of bleeding problems that can lead to a stroke.

Did you know?

More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.

NaCl crystals dissolving in water NaCl crystals dissolving in water
Rackstraw Downes, Presidio in the Sand Hills Looking East with ATV Tracks and Water Tower. Rackstraw Downes, Presidio in the Sand Hills Looking East with ATV Tracks and Water Tower.
The arrangement of water molecules in (a) solid ice, and (b) liquid water. The arrangement of water molecules in (a) solid ice, and (b) liquid water.
Water resources Water resources
The Excretory System Water and waste products from cells The Excretory System Water and waste products from cells
Video: EpiPen Animation (Part 2)

For a complete list of videos, visit our video library