... economizer,dust collector and draught fan.Compact soize,small installation spaxe,single-floor boiler room,cost-effective omfrastructure.Great ... assembily level,short installation period and cheap installation.Sufficient and reasonable heating area,quick temperature/pressure ... -16P 1.1kwGL20P/II1.5kwGL20P/II1.5kwGL-30P SZL series coal-fired hot water boiler