Announcement

Collapse
No announcement yet.

OT- Heating question

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • OT- Heating question

    I moved into my new house over the weekend. And damn, I have a lot of sh**. It took 4 grown men 4 women 2 days. Either I am not moving or I am paying someone next time.

    And I haven't even moved my garage or my basement office/some junk in the basement yet!!!!!!!!!!!!!

    Anyways, here is the point of the post.

    Father in law says...... " it doesn't matter if your thermostat is at 65 or 70, after the house in initially heated, it takes the furnace the same amount of gas to keep the house at any temperature"

    Now, before he said that, I was of the mind you keep the thermostat lower to save on propane.

    But now he seems kinda right. When the heater kicks on, its only gonna run until it brings up the room that the thermostat is in up to the setting, whether its 70 or 65.

    For the sake of the discussion, lets assume a newer house, with standard to good insulation using propane to heat a house.

    Thanks

  • #2
    No, the rate of heat loss depends on the temperature differential. Energy wants to flow downhill. The bigger the temperature difference, the steeper the hill.

    ----------
    Try to make a living, not a killing. -- Utah Phillips
    Don't believe everything you know. -- Bumper sticker
    Everybody is ignorant, only on different subjects. -- Will Rogers
    There are lots of people who mistake their imagination for their memory. - Josh Billings
    Law of Logical Argument - Anything is possible if you don't know what you are talking about.
    Don't own anything you have to feed or paint. - Hood River Blackie

    Comment


    • #3
      so in layman's terms, the rate of heat loss is higher for a warmer house, so therefore the heater is gonna kick on more to make up the difference.

      Does 5 degrees make that much difference?

      Comment


      • #4
        It takes less heat to maintain 65 than 70. All things (insulation) being equal. The saying is one degree is one percent of the gas bill over the year. I don't know how accurate that is though.

        Insulation and air infiltration are the biggies here. Most of the heat loss is lost through the attic.

        I use programable stats at home. They keep the house 68 from 4PM to 11PM then sets back to 63 for the rest of the night.

        James

        Comment


        • #5
          Heat loss happens as the square of the temperature difference. So five degrees makes a big difference.
          Free software for calculating bolt circles and similar: Click Here

          Comment


          • #6
            So, is that to say that maintaining the extra 5 degrees results in 25% higher (than baseline) heat loss? ...or 25% of the additional heat energy is lost?


            Does this take into account the eider-pinion effect?
            Lynn (Huntsville, AL)

            Comment


            • #7
              The actual loss depends on the temp difference. If you are doubling the temp difference the heat loss goes up 4 times.

              We use the eider-pinion effect to good advantage at our house. We both sleep under individual eider down comforters, extra large size, that we picked up in Denmark.

              One thing we did years ago that saves a bundle is to buy individual chair size electric blankets for our chairs in the living room. These are designed to sit on as a throw cover for the chair. We can turn the heat way down and still be comfortable. We just have to remember to turn it up when we have visitors.
              Free software for calculating bolt circles and similar: Click Here

              Comment


              • #8
                <font face="Verdana, Arial" size="2">Originally posted by meho:

                Insulation and air infiltration are the biggies here. Most of the heat loss is lost through the attic.
                </font>
                When we replaced the leaky steel-frame basement windows with glass block, the winter temp in the basement went up at least 10 deg, without any other changes. That's with only 4 standard basement windows......

                And the ground floor is a bit warmer too.....

                leakage hurts.

                1601

                Keep eye on ball.
                Hashim Khan

                Comment


                • #9
                  What I want to know is how can it get to -40 degrees here on the surface when the overwhelming majority of the earth is at 2000 to 13,000 degrees.
                  Free software for calculating bolt circles and similar: Click Here

                  Comment


                  • #10
                    <font face="Verdana, Arial" size="2">Originally posted by Evan:
                    What I want to know is how can it get to -40 degrees here on the surface when the overwhelming majority of the earth is at 2000 to 13,000 degrees.</font>
                    Earth's crust is a great insulator...

                    I've been thinking about running water pipe under my driveway the next time I redo it.. In theory if I circulate water from my well, through pipe in my driveway, and back into my well that will keep the driveway surface warm enough (40?) to prevent snow from building up. Maybe add an inline electric water heater if that doesn't fully prevent snow buildup.

                    -Adrian

                    Comment


                    • #11
                      <font face="Verdana, Arial" size="2">Originally posted by 3 Phase Lightbulb:
                      Earth's crust is a great insulator...

                      I've been thinking about running water pipe under my driveway the next time I redo it.. In theory if I circulate water from my well, through pipe in my driveway, and back into my well that will keep the driveway surface warm enough (40?) to prevent snow from building up. Maybe add an inline electric water heater if that doesn't fully prevent snow buildup.

                      -Adrian
                      </font>
                      Several people here have done similar,but in reverse.Using the driveway as a solar collector to heat the swimming pool water.500'poly tubing under the drive and a circulating pump does the trick.
                      Maybe plumb the thing to do double duty.

                      I just need one more tool,just one!

                      Comment


                      • #12
                        Steam is where I want to be. 50Hp boiler, run say, 135-150 psi, turn a 30-35kw genny. In the winter, exhaust is piped to radiators in the house, under the driveway and then back to the feed water tank. In the summer, we just dump it out the stack.

                        Fuel for this thing would be primarily corn, but could burn about anything if it needed to. Add in a pump and nozzel and I'll feed it waste engine oil at the same time.

                        Make it all automatic with computer control and we are done.

                        Lots and lots of wishful thinking here I know..

                        Comment


                        • #13
                          When all these guys are done with their analysis of their opinions, go and buy a programmable thermostat. One that you can set the temperature for at least four sections of the 24 hour day. Morning, daytime, evening and night. Pulse a weekend setting for Saturday and Sunday. You can then set it up to bring up the temperature just before you get up in the morning , say 70 then maybe drop it to 68â€‍a for daytime and evening. Then down to 63 or 65 for night. Might want to delay the wake up temp on the weekends or when not at home. I have had one for the past 5 years and would not be with out one.

                          [This message has been edited by lugnut (edited 12-12-2005).]
                          _____________________________________________

                          I would rather have tools that I never use, than not have a tool I need.
                          Oregon Coast

                          Comment


                          • #14
                            Putting tubing into driveway's so they can keep them snow free is pretty much common around here for new construction of $$$ houses. If I was to do over my driveway, I'd sure as hell do it. Most are using hot water from a boiler to keep the concrete warm. I don't think Ground water temp (around 50F actually) would be warm enough to do it, especially in the middle of a cold snap.

                            I would suggest to anyone who has a well and is looking to replace a furnace to strongly consider a geothermal heat pump. Much cheaper to run than other systems as you get the "heat" for free - you only pay to extract it. Requires electricity to operate the pump. Now here's where "strategery" comes in. Find out if your state requires the electric companies to "buy back"(at the same price charged!) electric from homeowners who generate power through Solar/wind/etc. If they do, get some solar panels and wire 'em into your household grid - if you have enough of them, you'll be able to heat and cool your house for free.

                            link1

                            link2


                            HTRN

                            ------------------
                            This Old Shed
                            EGO partum , proinde EGO sum

                            Comment


                            • #15
                              It depends on whether or not you leave the refrigerator door open or not.
                              Non, je ne regrette rien.

                              Comment

                              Working...
                              X