<html>
<head>
<style><!--
.hmmessage P
{
margin:0px;
padding:0px
}
body.hmmessage
{
font-size: 10pt;
font-family:Tahoma
}
--></style>
</head>
<body class='hmmessage'>
Stewart: In answer your question: "Anyone have advice on where to get the most bang for the buck?", select systems having the largest unsubsidized Savings-to-Investment-Ratio (SIR) so that poor people don't have to help pay for pale-green systems installed by the rich.<br>Carmine<br>gfxtechnology.com<br><br>Date: Fri, 29 Apr 2011 12:42:31 -0700<br>From: molasses@q.com<br>To: greenbuilding@lists.bioenergylists.org<br>Subject: Re: [Greenbuilding] upgrading a 1959 1800 sf building in Montreal<br><br> <br>Stewart Abbey wrote:<br>> I recently purchased a 30'x60' building built in 1959. A 20x20 garage <br>> with a room above exposed on three sides. Crawl space with 2 floors <br>> and a flat roof. Exterior is brick in good shape. Tar and gravel <br>> roof was redone in 2008. Some windows have been changed, about 2/3rds <br>> are the the 1960,s screw-on aluminum guillotine type that leak like a <br>> sieve!! Oil fired hot water heat (with original cast iron boiler <br>> probably 60% efficient). One heating zone for each floor. Main floor <br>> has 3 apartments, 2nd floor has 2 41/2room apartments. Heating <br>> loops all pass though the crawl space. Walls are 2x4 construction and <br>> would have the standard of the day 3" of rockwool or fiberglass.<br>> Oil consumption was 5700 liters in 2010, and 5000 liters in 2011=$4500<br>><br>> Last fall I had the crawlspace walls and rim joists blown with <br>> 21/2" of foam. Installed plastic on the crawlspace floor.<br>> The 2 second floor apartments will be empty next month. I'm <br>> thinking of blowing densepack cellulose into the 2x10 flat roof cavity <br>> from the inside through 3" holes in the gyproc. The current ceiling <br>> insulation is 3" rockwool or fiberglass. COST $5000+ plastering. The <br>> cost seems a lot but I know it is a slow job to do right. The <br>> contractor says 1 1/2 days per unit. <br>> We are probably getting gas on the street this summer and I am <br>> considering going to a 98% efficient<br>> gas condensing boiler. That alone should cut the heating bill by 50%. <br>> Gas is 93 cents per cubic meter.<br>> At the same time we would add zones so each unit would have it's own <br>> zone and thermostat.<br>> I am not planning on doing major renovations as the building is sound <br>> and well built.<br>><br>> Anyone have advice on where to get the most bang for the buck?<br>> Stewart Abbey<br><br> </body>
</html>