Just Installed a Keystoker KAA-2

 
User avatar
WNY
Member
Posts: 6307
Joined: Mon. Nov. 14, 2005 8:40 am
Location: Cuba, NY
Hot Air Coal Stoker Stove: Keystoker 90K, Leisure Line Hyfire I
Coal Size/Type: Rice
Contact:

Post by WNY » Tue. Jan. 04, 2011 8:05 pm

Read the other thread you started, we are giving you all the info there...

What Size Coal Stove Should I Buy? + Setup Tips/Suggestions?

 
User avatar
rebbelbiker
Member
Posts: 39
Joined: Sat. Oct. 03, 2009 3:30 am
Location: Youngstown, Ohio
Coal Size/Type: Nut

Post by rebbelbiker » Tue. Jan. 04, 2011 8:15 pm

1975gt750 wrote:here are some pics of the keystoker kaa-2 boiler just installed on sunday and just in time it is 2 degrees outside and only buning 3/4 of a bag a day
Beautiful system.
Your barometric damper weight is in the wrong slot.

Mark

 
User avatar
stovepipemike
Member
Posts: 1225
Joined: Sun. Jun. 15, 2008 11:53 am
Location: Morgantown ,Penna

Post by stovepipemike » Wed. Jan. 05, 2011 4:49 pm

I cannot imagine how anyone would go wrong with a KAA2 if it is sized correctly for the load.They are one rugged,bullet proof, sweet little boiler.They are cost effective on the purchase also. I love mine. Mike


 
ColdHouse
Member
Posts: 2289
Joined: Thu. Nov. 08, 2012 12:06 pm
Location: Bristol, CT

Post by ColdHouse » Sat. Dec. 25, 2021 11:36 am

How big of a house could this heat?

 
lzaharis
Member
Posts: 2365
Joined: Sun. Mar. 25, 2007 8:41 pm
Location: Ithaca, New York
Stoker Coal Boiler: Keystoker KAA-4-1 dual fuel boiler
Hand Fed Coal Boiler: former switzer CWW100-sold
Coal Size/Type: rice
Other Heating: kerosene for dual fuel Keystoker/unused

Post by lzaharis » Sat. Dec. 25, 2021 12:32 pm

So much of your question depends on how well insulated a home is.

A heat loss calculation needs to be done to determine what size heating system one needs for a specific home.

The kaa-2 is capable of heating 400 square feet of radiation to heat a home.

If it is poorly insulated the kaa-2 boiler will not keep up with the demand
especially if the wind is blowing and the home is not protected by a
wind break. The Net BTU for the kaa-2 is 76,000 BTU and the gross BTU output is 90,000.

The kaa-2 has a smaller water volume (24 gallons) than my KAA-4 (34 gallons) so that is also
a huge factor in deciding if it is big enough.

Here are 2 files you can download to determine your heating needs.

Attachments

HVAC Formulas.pdf
.PDF | 19.5KB | HVAC Formulas.pdf
UticaRadiationTables.pdf
.PDF | 69.8KB | UticaRadiationTables.pdf

 
ColdHouse
Member
Posts: 2289
Joined: Thu. Nov. 08, 2012 12:06 pm
Location: Bristol, CT

Post by ColdHouse » Tue. Dec. 28, 2021 12:53 pm

lzaharis wrote:
Sat. Dec. 25, 2021 12:32 pm
So much of your question depends on how well insulated a home is.

A heat loss calculation needs to be done to determine what size heating system one needs for a specific home.

The kaa-2 is capable of heating 400 square feet of radiation to heat a home.

If it is poorly insulated the kaa-2 boiler will not keep up with the demand
especially if the wind is blowing and the home is not protected by a
wind break. The Net BTU for the kaa-2 is 76,000 BTU and the gross BTU output is 90,000.

The kaa-2 has a smaller water volume (24 gallons) than my KAA-4 (34 gallons) so that is also
a huge factor in deciding if it is big enough.

Here are 2 files you can download to determine your heating needs.
I am presently not heating with my boiler. I am heating with 2 Hitzer 503's and utilizing less than 80lbs per day total. House is at or above 72*. We have had a relatively mild season to date. Only a couple days below 20* at night. If temperatures in 20's at night and 30's during day I use 80# or less of coal per day. That seems like it would equate to 41,666 per hour. Does any of that information help determine if that boiler would heat my home? House is just under 3,000 sq feet and built in 1982. I am certain it is insulated but I do not know to what specifications. We have double pane windows and there are no noticeable drafts.
Thanks


 
User avatar
Lightning
Site Moderator
Posts: 14658
Joined: Wed. Nov. 16, 2011 9:51 am
Location: Olean, NY
Stoker Coal Boiler: Modified AA 130
Coal Size/Type: Pea Size - Anthracite

Post by Lightning » Tue. Dec. 28, 2021 1:22 pm

ColdHouse wrote:
Tue. Dec. 28, 2021 12:53 pm
I use 80# or less of coal per day. That seems like it would equate to 41,666 per hour.
Once you factor in efficiency its actually less than that, ~34,000 BTU per hour. So I would say yeah, that boiler should handle your needs. That's just my opinion, according to this -

ColdHouse wrote:
Tue. Dec. 28, 2021 12:53 pm
The Net BTU for the kaa-2 is 76,000 BTU and the gross BTU output is 90,000.

Will you be using it for DHW also? What do you currently heat water with? How many people in the home? Do you already have hot water baseboard radiators in the home?

 
ColdHouse
Member
Posts: 2289
Joined: Thu. Nov. 08, 2012 12:06 pm
Location: Bristol, CT

Post by ColdHouse » Tue. Dec. 28, 2021 2:23 pm

Lightning wrote:
Tue. Dec. 28, 2021 1:22 pm
Once you factor in efficiency its actually less than that, ~34,000 BTU per hour. So I would say yeah, that boiler should handle your needs. That's just my opinion, according to this -





Will you be using it for DHW also? What do you currently heat water with? How many people in the home? Do you already have hot water baseboard radiators in the home?
The boiler I have has a zone dedicated for indirect hot water tank. Presently I have boiler come on for 15 minutes every 2 hours from 6am to 10pm just to make sure my DHW is hot. 3 cognitive adults and 2 incapacitated seniors that sponge bathe. Realistically wife and son shower in morning before work. I shower whenever I want. Always have hot water. House is hydro air. There is an air handler in a crawl space attic and one in lower level walkout basement. The one in attic handles main floor and upstairs bedrooms. If the boiler was having trouble keeping up I could use hitzers. Reason for the question is I found a good deal on this exact boiler with lots of coal to go with it.

 
User avatar
Lightning
Site Moderator
Posts: 14658
Joined: Wed. Nov. 16, 2011 9:51 am
Location: Olean, NY
Stoker Coal Boiler: Modified AA 130
Coal Size/Type: Pea Size - Anthracite

Post by Lightning » Tue. Dec. 28, 2021 2:45 pm

Seems like a good fit to me and you have the 503s to fire up at will.. I'd say go for it.

Post Reply

Return to “Stoker Coal Boilers Using Anthracite (Hydronic & Steam)”