Electro Industries EB-ZS-4 Special Retrofit Kit for older Electro EB-R, EB-L or EB-E Boilers, Can apply for to any 3 or 4 relay/sequencer Brand X Boiler
Electric boilers are capable of achieving their legendary efficiency ratings only with the proper installation of their necessary accessories. We offer thermostats, water kits, zone controllers and more to help your electric boiler system perform at its peak.
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95% DOP and HEPA/ULPA Filters 
