KA -6 ?

KA -6 ?

PostBy: Arte On: Tue Jan 29, 2013 8:08 pm

Wow all alittle overwhelming , been using a 90,000 btu wood boiler and ready for coal . Really cold nights in Maine really drag it down when garage radiant comes on , then hot water then bedrooms . Been looking at ka-6 from keystoker and wondering if it's too big . I think my plumber rated the house for 69,00 btu ,might not have figured in basement. House is 1500' with registers , garage (radiant) 900' basement (radiant) 800' . New modular home heats well above 0 but man you can't lug enough wood when it's below 0 . My oil is 100,00 will keep up but sure runs alot . My concern is too much overboil if ka-6 is too big . I will probably only use for winter season

Re: KA -6 ?

PostBy: Rigar On: Tue Jan 29, 2013 9:17 pm

So you have atotal of 1700 sq ft radient between the garage and basement?
And heating 1500 sq ft living space with how many feet of basebaord?
Where is boiler now - basement or garage ?
Is garage attached or no

...welcome aboard...you will find alot of knowledge here
Hot Air Coal Stoker Furnace: Keystoker A 150
Coal Size/Type: anthracite rice
Stove/Furnace Make: Keystoker
Stove/Furnace Model: A 150 warm air furnace

Re: KA -6 ?

PostBy: tikigeorge On: Tue Jan 29, 2013 9:43 pm

I can't follow all of your numbers, but I have a KA -6 heating a 2000 sq ft two story house. If you have it set up correct i don't think you can
" over boil". You must have the proper draft with a good chimney, coal needs that. I'm burning buckwheat oiled coal. My fifth year. Your wife will like the hot water in the shower! Go to the site inspectapedia and learn how a triple aqua stat works. This will be something worth learning. Some furnace servicemen don't know how they work.
Stoker Coal Boiler: Keystoker KA-6
Stove/Furnace Make: Keystoker
Stove/Furnace Model: KA-6

Visit Lehigh Anthracite

Re: KA -6 ?

PostBy: michaelanthony On: Tue Jan 29, 2013 10:21 pm

Welcome Arte, nice too see another mainah ready to be warm and saving a few bucks. This is my second successful yr. thanks to the folks here!
Hand Fed Coal Stove: Vigilant 2310, gold marc box stove, vogelzang pot belly coat rack
Baseburners & Antiques: Home Sparkle 12
Coal Size/Type: Tractor supply Kimmels 'nut
Other Heating: Very cold FHA oil furnace

Re: KA -6 ?

PostBy: Rick 386 On: Tue Jan 29, 2013 10:47 pm


First off, welcome to the forum.

Secondly, where in Maine are you? Sterling40man (Bob) is way up north in no man's land and heats his place with a KA 6 in the garage. Send him a PM and I'm sure he can answer any question you have.

A fairly new modular up there should have come with plenty of insulation. So heating it should not be much of a problem.

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: KA -6 ?

PostBy: Wiz On: Wed Jan 30, 2013 6:45 am

Personally I wouldn't be to concern if it's bigger then needed. 1700 sq ft with Maine temps I would get the Ka-6 and not worry if it'll keep up. Also if you add onto garage you'll have a boiler that will handle the extra sq ft
Stoker Coal Boiler: Keystoker Ka 6
Coal Size/Type: Casey Junk Coal :(

Re: KA -6 ?

PostBy: oliver power On: Wed Jan 30, 2013 8:02 am

I heat my 1700 square foot with a Kaa-2 in basement. It does a very good job. I'm very happy with it. However, once I add my hot water to the load, I believe it will be maxed out, or close to it. Should I want to add an out building, garage, etc., I don't think the Kaa-2 would handle it. If I had to do it over again, I'd buy the Ka-6. Put it in a central location, and heat my house, shop, and future garage. I also wouldn't be carrying coal "Down" into basement, and ash "UP" out of basement. One more thing to think about; I tend my Kaa-2 every 24 hours. Should you go out of town for more than 24 hours, the Ka-6 has a bigger hopper, as well as a bigger ash bucket. Actually, the Ka-6 has an ash tub, not bucket. Oliver
oliver power
Stoker Coal Boiler: KEYSTOKER Kaa-2
Hand Fed Coal Stove: Hitzer 50-93 & 30-95, Vigilant (pre-Vigilant-II)
Baseburners & Antiques: MANY (Mostly when burning wood)
Stove/Furnace Make: HITZER / KEYSTOKER
Stove/Furnace Model: 50-93 & 30-95 , Kaa-2

Re: KA -6 ?

PostBy: Rob R. On: Wed Jan 30, 2013 9:27 am

Hi Art - Here is some good info about boiler sizing.

Keystoker KA-6

If it were me, I would ask Keystoker if they could put a KB-8 stoker an a K6 boiler...they used to do this for steam boilers to give them some extra punch without the larger footprint. The Keystoker design is very rugged and simple, but if you get some coal that is prone to clinker it can cause problems when the stoker is running hard.

Do not base your boiler size on what someone else is heating with it. No two houses heat the same, and you are not exactly in the tropics... :) You want to size the boiler to allow for less than ideal conditions, such as mediocre coal, or a boiler that is overdue for a mid-season cleaning. Don't worry about the boiler overheating, these stoker boilers will idle for days on end just like a big diesel engine...but without the smoke. ;)

How warm do you keep the garage?
Rob R.
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy

Re: KA -6 ?

PostBy: sterling40man On: Wed Jan 30, 2013 10:14 am

Rick 386 wrote:Sterling40man (Bob) is way up north in no man's land and heats his place with a KA 6 in the garage.

That's me! :lol: I love my K6! I'm heating my 2,400sf house at 72* and my 1,200sf garage at 42* with no problems at all. Shoot me a PM if you have any questions.
Stoker Coal Boiler: Keystoker K6
Stove/Furnace Make: Keystoker
Stove/Furnace Model: KA-6

Re: KA -6 ?

PostBy: Paulie On: Wed Jan 30, 2013 5:32 pm

Have you seen the KA-6? Logistically speaking, she is a BIG GIRL! So big, it makes the KA-2 look tiny.
Stove/Furnace Make: leisure Line
Stove/Furnace Model: Pioneer

Re: KA -6 ?

PostBy: Arte On: Wed Jan 30, 2013 8:37 pm

Had a chance to see one last weekend , about twice the size of my wood boiler . I've got lots of room after storage for 8 cords of wood easily

Re: KA -6 ?

PostBy: steamup On: Thu Jan 31, 2013 11:00 am

Same concern I had when I first started looking. I have a KA-6. I can idle for days at 140 to 150 deg boiler temp. No problem with the lighter load. Plenty of extra capacity for DHW.

KAA-2 will be too small for you.
Stoker Coal Boiler: Axeman-Anderson AA-130, Keystoker K-6
Hand Fed Coal Boiler: HS Tarm 502 Wood/Coal/Oil
Coal Size/Type: pea, buck, rice

Visit Lehigh Anthracite