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Conference 7.286::home_work

Title:Home_work
Notice:Check Directory (6.3) before writing a new note
Moderator:CSLALL::NASEAM::READIO
Created:Tue Nov 05 1991
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:2100
Total number of notes:78741

65.0. "Hot Water - LP Gas" by ERLANG::BLACK () Mon Feb 29 1988 20:00

    I'm looking for more info on PROPANE as a water heating fuel. 

    We currently have a huge electric water heater (family of five in a 2.5
    bathroom house with dishwasher and clothes washer running
    continuously.) It (the water heater) looks like it is on its last legs,
    and I don't want to be left in the lurch. 

    I've thought about tankless, but can't imagine training the kids not to
    wash their hands while I'm in the shower, or the washing machine not to
    cut it, etc. 

    We currently have a all-electric house, six years old, sigh.  There is
    no gas in the street, so Natural Gas is not an option.  The water
    heater is in the garage, as we have no basement.  It is by an outside
    wall.

    We pay around $0.07 per kwh for electricity; in the summer the elctric
    bill is around $70/month, for hot water, lights, cooking and the
    clothes dryer. I'm intersted in Liquid Propane as a water heating fuel
    since it ought to be cheaper. 

I just called a propane company (Petrolane in Westford).  What they told me
is:

    40 gal water heater with 5 year warranty is $200 +tax.  However, since
    we don't have a flue, we would need the "power vent" model that vents
    through the wall with a fan -- $385.

    Installing two 100 gal propane tanks outside will be $37.50

    They will not do the interior installation; I have to find my own
    Licenced plumber (this is MA!).  I would guess $200

    Propane is $1.36/gallon  One vaporised gallon produces 93 000 btu of
    heat.   

In terms of running costs, I believe that 1 kWh = 3.412128e+03 btu, which
makes the cost of the LP Gas 4.989 cents per kWh -- call it 5 cents.  So,
IF the gas water heater is 100% efficient, I'm saving 28% on my fuel bill.
If it's only 70% efficent, I break even, and if it's less than 70% I'm
losing money on the deal.  This is assuming 100% efficiency for the
electric heater, which is close, since they can be insulated pretty tight.

If anyone would like to comment on this analysis, especially in the light
of real experience with LP gas water heating, I'ld appreciate it.
                                 
    
    Other sorts of comment all also welcome, of course!
    
    Andrew
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65.1ERLANG::BLACKTue Mar 01 1988 03:146
    I just checked my most recent electric bill -- I'm currently paying
    5.672 cents per kWh.   So, if my figures are right, it looks like
    I should forget about Propane.
    
    	Andrew
    
65.2FRSBEE::DEROSAbecause a mind is a terrible thingTue Mar 01 1988 11:3116
    I have oil heat with tankless hot water and about 3 years ago I
    had a propane hot water system put in because I didn't want to burn
    oil in the summer. At the time it was cheaper than electric and
    I think it still is, I'd have to check my records. Anyways I have
    been totally happy with it so far and there's plenty of hot water.
    We hit the propane company at the right time because they were
    practically giving you a water heater free with installation. It
    is an AO SMITH super insulated job (40 gals.) 
    
    We installed so I can still switch back and forth from the propane
    heater to the tankless oil heater by way of a couple of valves.
    
    Bob
    
     
    
65.3I'd stay with the electricREGENT::MERSEREAUTue Mar 01 1988 13:429
    
    Usually, people with all electric houses get a good rate on
    their electric bills (better than the people who heat with
    oil or gas).  It sounds to me like the $70 a month is pretty
    inexpensive for a household using all the hot water you do,
    as well as cooking, etc.  I doubt you would see any payback
    from another system.  You might save a little by going with
    low-flow shower heads, and other energy saving devices, though.
    
65.4Stay w/ electric and install a timer...ALIEN::PETROVICLooking for a simpler place & time...Tue Mar 01 1988 13:5415
	I looked  into  propane  also  and although the information I got
	from the local gas  man  was  promising,  I  decided to stay with
	electric.  I have a separate meter for the water heater and until
	I  installed  a  timer,  my  bill  was  in  the  neighborhood  of
	$50/month.  That has been cut in half.  We have two kids, 1 and 3
	years  old,  so  the  washer's running quite  a  bit  as  is  the
	dishwasher and have seen no real increase since  the timer's been
	online (4 years now).
	
	The timer's built by Intermatic and sells under  the name of 'The
	Little Gray Box' for about $25-$30.  It paid  for  itself  in the
	first month.  I have it set to go on  at  7:00AM, off at 9:30, on
	again at 5:00PM and off at 8:00PM.  It has a  manual override for
	special  days when  company's  over  or  whatever.    
65.5Second the low-flow showerheadHPSTEK::EKOKERNAKTue Mar 01 1988 15:2116
    I got a low-flow shower head out of principle.  Now all my friends
    with tankless systems, and/or teenage children are getting them.
    We are all thrilled.
    
    The one I got (from MassSave) is the smallest and simplest looking
    of them all.  I think it was also the most expensive ($10 in the
    stores).
    
    $70 a month is not bad.  I'd stick with it, get the low-flow, and
    maybe put on a timer.  If you want a benchmark, I'm a single homeowner
    with 80 gal. electric water heater.  Last summer, with no energy
    conservation or insulation my electric was $40.
    
    I'll update this number after this summer.
    
    Elaine
65.6Timer sounds good, low-flow head harder ...ERLANG::BLACKWed Mar 02 1988 18:3120
    The timer is a good idea, and is something that I should do.  If
    anyone sees the little gray boxes on sale, please post a note.
    
    I got a low-flow showerhead for our last house, and planned to install
    the same one here.  In fact, I have it in the garage right now.
    The $10 variety with the push pin on the head that almost stops
    the flow while you soap up.
    
    Unfortunately, the shower head assumes a standard male thread on
    the end of the pipe that sticks out of the wall.  My current shower
    doesn't have a pipe: it has a squarish block of metal, with a FEMAL
    threaded hole in it into which the shower head screws.
    
    Is there a simple fix to this?  I just figured that it wasn't worth
    taking the big wrentch to the old, ripping it out, and then having
    to do major repairs to get the low flow head on.  After all, the
    point is to SAVE money.
    
    	Andrew
    
65.7HPSMEG::LUKOWSKII lost my A$$ in the '87 CRASH!Thu Mar 03 1988 12:038
    Re: .6
    
      Go to your friendly plumbing supply house or Spag's, whichever
    is closer :^), and ask for a brass nipple.  I'm assuming that the
    thread sizes will match but you should ask.  The brass nipple is
    1 1/2" to 2" long and is threaded (male) on both ends.
    
    -Jim 
65.8Try Suburban Propane.DRUID::CHACEThu Mar 03 1988 16:0210
     Try Suburban Propane, they will do the complete installation; either
    to you hot water heater or to one they supply. On added benifit
    (I think) is that unlike some other companies, they refill YOUR
    tank rather than exchanging it with another. (just like an oil company
    does to the oil tank in your house) This gives you more flexibility
    in locating the tank. The only limit is the length of the hose ~75'.
    I have had them for 2 different home for over the last 8 years and
    I am satisfied overall.
    
    					Kenny
65.9Eastern PropaneHACKET::KUSCHERKenFri Mar 04 1988 15:477
        Eastern Propane will also install.  They also supply the
        tank at no charge (they own it ).  I pay 94 cents per
        gallon  minus a 4 cent discount if paid within 2 weeks of
        receiving the bill.  
        
        Ken
65.10Propane HW to Natural Gas conversionHOCUS::KCARPENTERThu Feb 16 1989 17:3520
    I hope someone is still reading this note!
    
    I am considering a house that currently has a electric FHA heating
    system with electric backup, and a propane tank for hot water and
    cooking, at about $32/month.                                              
                                                          
    I'm not crazy about a propane tank in my backyard, and am considering
    a conversion to natural gas.  This wasn't an option to the current
    owner when the propane was installed.                 
                                                          
    Has anyone done this conversion?  Can the tank be retrofitted or
    is it worth buying a new gas heater?  Niagara Mohawk(utility co)
    will bring in the gas line for free, but I need to do the rest.
     Is this a DIY project?  What about the stove...can that be converted
    to natural gas?  Does the copper pipe need to be changed to steel?
                                                          
    Bottom line...is this conversion worth the investment?
    
    Kevin DTN:344-2206
             
65.12Gas is a little worseMPGS::LEVESQUEThe Dukes a DINK!Thu Feb 16 1989 18:4013
    
    
    
    rep -1
    
      Yes, BUT a month or so ago a house in Auburn had a tank system
    in the backyard and something leaked somewhere. That morning when
    the poor kid turned on the TV KAPOW no more house. It was gone
    not even a stick standing. Every surrounding house was damage
    quite extensively. I think that must have scared alot of people
    with gas anything.
    
    BAL
65.13CALVA::WOLINSKIuCoder sans FrontieresThu Feb 16 1989 18:4318
    
    Rep .10
    
      Yes you can convert the hot water heater and stove to natural
     gas. It involves changing the gas orifices because of the 
     different pressures between propane and natural gas. I would
     say it is a DYI job BUT I would have somebody do it for me.
     The main reason is insurance liability if you screw up and
     blow up your house I'm sure your insurance company would stick
     it to you. The job is really easy just unscrewing the propane
     orifice and screwing the natural gas orifice back in place.
     You would have one on the hot water heater and six on the stove.
     <one for each burner, one for the broiler, one for the oven>
     I hope this helps. 
    
     -mike