How far will blower push heat through the ductwork

How far will blower push heat through the ductwork

PostBy: NorthernIndiana On: Sun Nov 20, 2011 6:52 pm

I'm looking at getting a Kozy-King by D&S for my parents. It has a three speed blower (1100, 1250, 1450 cfm) fan speed. The unit is a 140k BTU max unit. I want to use the blower to distribute heat through their ductwork. Can I put the furnace anywere so long as it blows into the main trunk of the duct work?

I have never seen a stove / coal furnace with a blower. Does the blower really distribute heat well? Does the heat coming out of the floor vents feel warm?

Thanks in advance!
NorthernIndiana
 
Hand Fed Coal Stove: DS Machine #4 Basement with Hopper, DS Machine 1300 Circulator
Coal Size/Type: Nut

Re: How far will blower push heat through the ductwork

PostBy: McGiever On: Sun Nov 20, 2011 7:00 pm

Yes, that will move some air if the duct doesn't become the bottle-neck.

Read here about back-draft dampers unless you already understand.
There has been a lot of discussion of them previously.
McGiever
 
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hot Air Coal Stoker Stove: HARMAN MAGNUM
Hand Fed Coal Stove: RADIANT HOME AIR BLAST
Baseburners & Antiques: OUR GLENWOOD 111 BASEBURNER "1908"
Coal Size/Type: PEA / ANTHRACITE, NUT-STOVE / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek

Re: How far will blower push heat through the ductwork

PostBy: NorthernIndiana On: Sun Nov 20, 2011 7:13 pm

Thanks McGiever. Where would the back draft damper go? Between (the coal furnace and the main truck) or between (the gas furnace and the main trunk)? They will be running the central A/C during the summer.
NorthernIndiana
 
Hand Fed Coal Stove: DS Machine #4 Basement with Hopper, DS Machine 1300 Circulator
Coal Size/Type: Nut


Re: How far will blower push heat through the ductwork

PostBy: WNY On: Sun Nov 20, 2011 7:33 pm

Most Gas/Propane/Oil furnace blowers are around 1500CFM or so. If you have match that, you should have good air flow.

Most standard coal STOVES have only 150-350CFM,that why stoves don't make good furnaces if hooked into ductwork.
WNY
 
Hot Air Coal Stoker Stove: Keystoker 90K, Leisure Line Hyfire I
Coal Size/Type: Rice
Stove/Furnace Make: Keystoker, LL & CoalTrol
Stove/Furnace Model: 90K, Hyfire I, VF3000 Soon

Re: How far will blower push heat through the ductwork

PostBy: Bratkinson On: Sun Nov 20, 2011 11:06 pm

I'm using a pair of 405 CFM fans pushing air around/through my Channing III and it's plugged into the existing 'main trunk' of the forced air furnace. I've also tapped into the cold air returns so there's a complete 'circuit' of air...just like the furnace does. In electrical terms, my stove is in 'parallel' with the furnace, and each must be used separately, not additively.

Between air flow loss due to duct size, turns, and length of my connections, there's a noticable any air flow coming out the vents on the first floor of my cape cod style house, but it's far shy of the airflow from my furnace fan. However, it DOES work reasonably well although it's considerably slower to raise the house temps than what the gas furnace can do.

I've put a do-it-yourself back draft preventer in the main furnace duct so I am not pushing warm air towards the furnace. Also, I have manual dampers in the cold air returns and the corresponding take-offs so that the cold air return comes from the rooms, not from the existing cold air ductwork (ie, no backflow from the furnace).

I still have to do some minor re-do of the cold air ductwork to reduce the swooosshhh sound from the cold air return in the living room. That's my only problem with my installation.
Bratkinson
 
Hot Air Coal Stoker Stove: Alaska Channing III
Other Heating: Gas FA
Stove/Furnace Make: Alaska
Stove/Furnace Model: Channing III

Re: How far will blower push heat through the ductwork

PostBy: McGiever On: Sun Nov 20, 2011 11:25 pm

NorthernIndiana wrote:Thanks McGiever. Where would the back draft damper go? Between (the coal furnace and the main truck) or between (the gas furnace and the main trunk)? They will be running the central A/C during the summer.


They must be placed so that when either unit is blowing that it would not blow backwards into the other one which is not operating. Think "check valve" :idea:

It will be a mess if you would reverse the flow through a dirty air filter too. :!:
McGiever
 
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hot Air Coal Stoker Stove: HARMAN MAGNUM
Hand Fed Coal Stove: RADIANT HOME AIR BLAST
Baseburners & Antiques: OUR GLENWOOD 111 BASEBURNER "1908"
Coal Size/Type: PEA / ANTHRACITE, NUT-STOVE / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek