Hello jnn, contact keystoker http://www.keystoker.com
and see if the Kaa2 or the Ka6 will make enough steam for your house..
AHS and the Axeman Anderson boilers can be used for steam as well as an EFM.
Most boilers can be set up to make steam.
This link is broken, either the page no longer exists or there is some other issue like a typo.