AHHA LogoKroll Heaters has joined the AHHA due to increasing customer demand for domestic wood powered hydronic heating systems. The Australian Home Heating Association Inc (AHHA) is the peak industry body representing over 250 manufacturers, retailers, installers, maintenance companies and the firewood sector of the home heating industry. See  http://www.homeheat.com.au  for more interesting information for users and manufacturers concerning wood heating fireplaces and heating systems.