reply to pandora
Re: Decent 20-30 KW standby generator Re-think the heating solution (if you have propane then use it for auxiliary heat).
I've been without power for over 6 days after Sandy, my 7200W generator was able to power the entire house without any issue.
Honestly it makes absolutely no sense whatsoever to use electric aux when you have propane, the break-even price is around $4/gal for $0.16/kWh, you can get a propane generator to handle the entire house for under $1000 while a big-ass 20kW propane generator is in the $5000 range.
Not to mention you'd be using some 2.5gal/h at 50% load, one week without power will run you in the $1000 range for fuel.
And one more thing: the delivery capacity of the tank. Depending on temperature and humidity even a 1000gal tank may be unable to supply enough fuel without frosting.
I agree with Cowboyro.
You'd be much better off using the propane to heat the house directly. The money you save by getting a smaller generator could easily cover the cost to install a gas furnace as an emergency heat source.
You'll also save a lot on the cost of running the generator. Conversion of propane to electricity is very inefficient, so even with high efficiency heatpumps, when you consider the big picture, you'd be burning much more propane heating the house with the heat pumps than with a gas furnace.
·Future Nine Corp..
said by TheMG:No chimney, no flue, no way to vent propane at this time from inside the house (other than cooktops).
I agree with Cowboyro.
You'd be much better off using the propane to heat the house directly.
"If you put the federal government in charge of the Sahara Desert, in 5 years there'd be a shortage of sand." - Milton Friedman"
said by pandora:Modern high efficiency furnaces don't require a chimney. The flue is essentially just a couple of plastic pipes. Ours just runs straight out the side wall of the house nearest the furnace.
No chimney, no flue, no way to vent propane at this time from inside the house (other than cooktops).
The furnace would install in your existing ductwork, assuming you have ductwork in place already.
I have to agree with TheMG on this.
concentric vent sample
Todays furnaces use PVC piping for the combustion air exhaust and intake.
You can run the pipes through the roof or exterior side wall.
Most (if not all) offer a Concentric Vent kit that pipes both combustion air and exhaust in to one pipe so there is only one penetration through the wall or roof.
You can even paint out the pipe to hide it.
In addition, because the combustion air is piped it, you don't have to worry about combustion air louvers or the furnace using warm room air for combustion air.