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Most Efficient Job Site Heater?

 
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Old 01-31-2019, 11:37 AM   #1
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Most Efficient Job Site Heater?


I could sit down and do all the math, but I'm hoping someone here has an off-the-cuff assessment of these.

I'm looking at electric, propane, or kerosene.

I'm a little concerned about propane, because of the moisture issue. I'll be using it from framing through paint, and I don't want drywall to take 3 weeks to dry.

Not sure if kerosene has the same issue.

I'm guessing an electric heater would be pretty pricey to run?

I'm looking to heat between 1,000 and 2,000 SF at a time.



Thanks.
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Old 01-31-2019, 12:24 PM   #2
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Re: Most Efficient Job Site Heater?


Up here, it's cheapest to temporarily set up a kerosene direct vent system like a used OM-22. They run about 23K BTU, so they don't put out the heat a torpedo does.

Some people put in an actual furnace temporarily.

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Old 01-31-2019, 12:51 PM   #3
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Re: Most Efficient Job Site Heater?


Iíve worked around diesel radiant heaters and I think they are the best

Similar to this

https://www.sunfireheater.com/
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Old 01-31-2019, 08:45 PM   #4
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Re: Most Efficient Job Site Heater?


Despite the cost, I prefer electric vs flames, refueling, vapor, odors, stains, etc.

With drywall, sometimes more heat costs less. 80 degrees plus a dehumidifier means a coat a day. 60 degrees and wet might be half the cost per day but 5x the days.
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Old 01-31-2019, 09:03 PM   #5
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Re: Most Efficient Job Site Heater?


Homeowner pays for electricity so itís cheapest for us.

We run diesel salamanders during the day until itís insulated and then switch to these
https://www.globalindustrial.com/p/h...er-15kw-240v-1

These things are badass, and they always work. We have had one for 15+ years? They make the meter spin but you can leave them on 24/7 because of the thermostat and no worries.
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Old 01-31-2019, 11:36 PM   #6
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Re: Most Efficient Job Site Heater?


Quote:
Originally Posted by donerightwyo View Post
Homeowner pays for electricity so itís cheapest for us.



We run diesel salamanders during the day until itís insulated and then switch to these

https://www.globalindustrial.com/p/h...er-15kw-240v-1



These things are badass, and they always work. We have had one for 15+ years? They make the meter spin but you can leave them on 24/7 because of the thermostat and no worries.


The link didnít work for me.


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Old 01-31-2019, 11:41 PM   #7
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Re: Most Efficient Job Site Heater?


I picked up a new diesel heater this fall, it lasted a couple days, then I returned it.

I always try to run electric heaters. Homeowner pays the bill, no fumes, and I donít have to buy fuel.


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Old 02-01-2019, 12:30 AM   #8
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Re: Most Efficient Job Site Heater?


Thanks for all the info, guys.

Gonna have to check into a few of those.

Forgot about the diesel option.
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Old 02-01-2019, 07:57 AM   #9
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Re: Most Efficient Job Site Heater?


If there is a gas service Schwank heaters are the go to here:

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Old 02-01-2019, 11:37 PM   #10
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Re: Most Efficient Job Site Heater?


Quote:
Originally Posted by 51carpenter View Post
The link didn’t work for me.


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Maybe this one....


https://www.grainger.com/product/FOS...r-Heater-3LY27
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Old 02-02-2019, 09:59 AM   #11
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Re: Most Efficient Job Site Heater?


It's worth noting that that big electric heater is only 50k btu but still requires an 80A breaker. If you need more heat, your only option might be fuel powered.
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Old 02-02-2019, 10:29 AM   #12
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Re: Most Efficient Job Site Heater?


Quote:
Originally Posted by Golden view View Post
It's worth noting that that big electric heater is only 50k btu but still requires an 80A breaker. If you need more heat, your only option might be fuel powered.
RightIt takes a lot of juice, and we wire directly into the panel with a long cord we have on it. If you are leaving the heat on all the time though(insulated) it will heat a large area, and is worry free.
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Old 02-02-2019, 12:15 PM   #13
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Re: Most Efficient Job Site Heater?




At .19 cents a KwH, it'll cost $70 a day to run.

I've been looking at those little propane heaters that attach right to the top of the tank.

Remember, my "low" temp here is 40. Brrrrr.......
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Old 02-02-2019, 12:27 PM   #14
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Re: Most Efficient Job Site Heater?


Quote:
Originally Posted by Seven-Delta-FortyOne View Post


At .19 cents a KwH, it'll cost $70 a day to run.

I've been looking at those little propane heaters that attach right to the top of the tank.

Remember, my "low" temp here is 40. Brrrrr.......
Equiv to 40 lbs of propane
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Old 02-02-2019, 01:23 PM   #15
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Re: Most Efficient Job Site Heater?


Quote:
Originally Posted by Seven-Delta-FortyOne View Post


At .19 cents a KwH, it'll cost $70 a day to run.

I've been looking at those little propane heaters that attach right to the top of the tank.

Remember, my "low" temp here is 40. Brrrrr.......

Electric is usually very roughly double the cost of other heat sources.

Assuming you need to run it 24 hours, I'd still pay $35 a day extra to not pick up, haul, spill, connect, run out of fuel, and no fumes or moisture.
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Old 02-02-2019, 01:59 PM   #16
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Re: Most Efficient Job Site Heater?




Yep.

One of the advantages is not having to deal with fumes and CO in an enclosed structure.
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Old 02-02-2019, 02:59 PM   #17
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Re: Most Efficient Job Site Heater?


Quote:
Originally Posted by Seven-Delta-FortyOne View Post




At .19 cents a KwH, it'll cost $70 a day to run.



I've been looking at those little propane heaters that attach right to the top of the tank.



Remember, my "low" temp here is 40. Brrrrr.......
That's running flat out...

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Old 02-02-2019, 05:11 PM   #18
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Re: Most Efficient Job Site Heater?


It is the 21st Century, the wet dangerous open flame heat is persona non grata on nearly all jobs here.

Use home style LP furnaces on the start to finish homes, spot heat with the diesel/kerosene heaters...
Change to N.Gas jets whenever N.G. available.


My old boss still use pot heaters, he has had the drive bys call the fire department, and they shut down the heaters WITH NO COURTESY call... several times the last two winters....

Un vented = WET = Silly IMHO

A used(removed from service) N.gas/LP furnace,is cheaper, quieter, and dryer.

use a couple flame proof fabric hot air trunks on a tee plenum.

use the air filter box, reduce indoor air\ pollution levels

Very large homes use 2 or 3 heaters, removing one as the home is tightened up.

Natural Gas right now is so much cheaper, buy the meter(~225.00$) if necessary, if it on or near site.

L.P. for rural gas free areas, but use large tanks(if you own one or two you can pick the dealer)
under 300 gallon tanks will cost far more the the bulk nurse tank.

One can leave out a basement window and put chimney thimble in...
Condensing furnaces chimneys are much simpler, other then you need back up heat to keep the water from freezing in the furnace, a couple of 100 Watt light bulbs.....

A few minutes one can install wheels and filter boxes on the furnace. along with the 24 Volt transformer and a thermostat wire & programmable t-stat.

Many times installed black pipe in place is the cheapest solution for temp piping. just label it and leave in place.

Keeping the house at the same temp and humidity as it future conditions will reduce moisture related call backs. using dehumidifiers everyday in a new home is a no- brainer for insuring your rep as a quality builders at a cost of only a few hundred dollars of electricity.

And of course a pleasant work space will attract higher quality workers and subs all winter long.
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Last edited by Fouthgeneration; 02-02-2019 at 08:04 PM.
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Old 02-02-2019, 06:44 PM   #19
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Re: Most Efficient Job Site Heater?


Or do it how I used to: 12 month build cycle, maybe a little less with some later winter remodels.

Start when the ground thaws (June in Fairbanks Alaska), get insulation and permanent heat installed around September or October, do all inside finishes throughout the winter.
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Old 02-03-2019, 11:20 AM   #20
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Re: Most Efficient Job Site Heater?


Quote:
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Those are pricy, probably work great.


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