Dual-Fuel Furnace for summer DHW.

Dual-Fuel Furnace for summer DHW.

PostBy: EarthWindandFire On: Wed Dec 05, 2012 1:45 pm

I'm thinking about upgrading to a dual-fuel hot-air stoker furnace, maybe a Keystoker A-80 with an oil gun, for the following reasons.

1). I want to be able to run the furnace during the summer to prevent/reduce stove corrosion from humidity.

2). Disconnect the natural gas water heater from the single flue chimney.

3). Using the furnace during the summer should reduce the excessive humidity in my basement.

Does anyone here run a dual-fuel hot-air furnace with a coil during the summer to produce hot water?
EarthWindandFire
 
Hot Air Coal Stoker Furnace: Leisure Line Lil' Heater.
Hand Fed Coal Stove: Hitzer model 75.
Other Heating: Oil and Natural Gas.

Re: Dual-Fuel Furnace for summer DHW.

PostBy: Rick 386 On: Wed Dec 05, 2012 7:30 pm

Nope,

I run a single fuel boiler....................... AA 260 all year long. Been going strong for several years now.




Rick
Rick 386
 
Stoker Coal Boiler: AA 260 heating both sides of twin farmhouse
Hot Air Coal Stoker Stove: LL Hyfire II w/ coaltrol in garage
Coal Size/Type: Pea in AA 260, Rice in LL Hyfire II
Other Heating: Gas fired infared at work

Re: Dual-Fuel Furnace for summer DHW.

PostBy: Rob R. On: Wed Dec 05, 2012 7:57 pm

Mark, I don't think you would be happy with that kind of setup. The coils don't produce a lot of water compared to the heat the unit would put into your basement.

A boiler is the way to go if you want heat and year-round hot water.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy


Re: Dual-Fuel Furnace for summer DHW.

PostBy: Dennis On: Wed Dec 05, 2012 8:12 pm

EarthWindandFire wrote: maybe a Keystoker A-80 with an oil gun,


If you do go this route,ask if the oil gun can be replaced by a Ngas burner since you have Ngas and is way cheaper than oil
Dennis
 
Hand Fed Coal Boiler: AHS/WOC55-multi-fuel/wood,oil,coal
Coal Size/Type: Anthracite/stove size

Re: Dual-Fuel Furnace for summer DHW.

PostBy: Lightning On: Wed Dec 05, 2012 8:13 pm

Rob R. wrote:Mark, I don't think you would be happy with that kind of setup. The coils don't produce a lot of water compared to the heat the unit would put into your basement.

A boiler is the way to go if you want heat and year-round hot water.


I have to agree with Rob. I have a forced air furnace with water coils in it. It would definitely lose too much heat to the basement and house meanwhile the coils wouldn't pick up very much heat. Don't get me wrong, the coils do heat the water but its just enough to keep my preheated tank at 120 degrees when I'm pushing the furnace to keep it warm in the house while its 25 degrees outside. Its fine during the heating season but wouldn't be realistic in the summer months.
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut/Stove Size Mix

Re: Dual-Fuel Furnace for summer DHW.

PostBy: franpipeman On: Thu Dec 06, 2012 8:39 am

If you are looking for humidity reduction in summer a hot water heat pump, dehumidfies your space and puts the heat
nto your hot water heater storage tank very effiecient in summer some like what is known as the geyser from nyle can be hooked up to indepenct storage tanks makes your hot water and dehumidifies your home at a very low electrical usage.
franpipeman
 
Stoker Coal Boiler: efm 520 stoker fitzgibbons pressure vessel
Hand Fed Coal Stove: harman, russo
Coal Size/Type: rice

Re: Dual-Fuel Furnace for summer DHW.

PostBy: JRDepew On: Thu Dec 06, 2012 9:31 am

franpipeman wrote:If you are looking for humidity reduction in summer a hot water heat pump, dehumidfies your space and puts the heat
nto your hot water heater storage tank very effiecient in summer some like what is known as the geyser from nyle can be hooked up to indepenct storage tanks makes your hot water and dehumidifies your home at a very low electrical usage.


I have been seriously looking into to getting one of these. I have a small DHW load (2 adults) and my electric bill is only 50-60/month in the summer. Even if I burned 20-25lbs a day that would cost 90-100 dollars a month. However, I am in upstate NY so humidity is bad here in the summer. My basement was routinely 80%+ humidity last summer, no dehumidifier. I was thinking that since I have electric hot water anyway, I could get the Nyles Geyser and hook it right up to my electric tank like they describe in the youtube video. This would heat my hot water at a reduced rate and dehumidify the basement. My only concern is....since I have a light DHW load will I get enough de-humidification in the basement to make a difference? Any one have some real world experience with one of these units?

Thanks,
Joe
JRDepew
 
Stoker Coal Boiler: EFM 350

Re: Dual-Fuel Furnace for summer DHW.

PostBy: EarthWindandFire On: Thu Dec 06, 2012 11:19 am

From the quick research I did concerning the Nyles Geyser is that the cost is prohibitive unless you absolutely need it. When people were still able to buy direct from Nyle (the manufacturer), the unit was cheaper, but once it started being marketed by Geyser, the unit now costs nearly $ 2,000 each. Also, due to low btu output, the water temp recovery time is poor.
EarthWindandFire
 
Hot Air Coal Stoker Furnace: Leisure Line Lil' Heater.
Hand Fed Coal Stove: Hitzer model 75.
Other Heating: Oil and Natural Gas.

Re: Dual-Fuel Furnace for summer DHW.

PostBy: JRDepew On: Thu Dec 06, 2012 12:48 pm

I was just quoted around 1100 for the Nyles Geyser from http://www.americansolartechnics.com/photos.html

Where did you get quoted around 2k? The recovery is painfully slow but a dehumidifier by itself is expensive to run and will run 24/7 in my neck of the woods.

Joe
JRDepew
 
Stoker Coal Boiler: EFM 350

Re: Dual-Fuel Furnace for summer DHW.

PostBy: franpipeman On: Thu Dec 06, 2012 12:50 pm

I have a geyser and I did get it for 1k many years ago. In the summer when its hot and humid I cant run it enough to dehumidify my space completely due to the fact that the hot water temp is satisfied. I also got a 300 tax credit and a 300 utility credit. If i had larger storage like 100 gals it would dehumidify my whole 1300 sq ft basment but it does a adequate job with humidification. IN the winter since the air is not humid it does run longer as humidification is more important for hot water making then temp but I do keep the basement 78 degrees with coal and it uses the heat to run still better than electric cost if i remember their coeffiecency of performance chart. AS the temp nears 50 you get reduced performance. I have a two adult household. IN winter making time is slower but good for two in my view.
franpipeman
 
Stoker Coal Boiler: efm 520 stoker fitzgibbons pressure vessel
Hand Fed Coal Stove: harman, russo
Coal Size/Type: rice

Re: Dual-Fuel Furnace for summer DHW.

PostBy: franpipeman On: Thu Dec 06, 2012 1:04 pm

since i have well water that is cold , to prevent toilets from sweating , I mix geyser generated hot and cold well water at each toilet with check valves on each hot and cold. It does three things , prevents toilets from sweating, assure instant hot water at each faucet and keeps the geyser running a little longer for the humiid days, It is my hypotheses that these three items overcome and slight energy ineffiencies. ,
franpipeman
 
Stoker Coal Boiler: efm 520 stoker fitzgibbons pressure vessel
Hand Fed Coal Stove: harman, russo
Coal Size/Type: rice