In our first presentation on Variable Flow Hydronic Heating Systems, Tony Furst looked at Primary/Secondary loops in detail. The event drew record attendance and was very highly rated.  Advancing the discussion further, this week Peter Wolff will discuss Primary-Only heating loops. Topics will include the advantages of Primary-Only, the drawbacks and how to specify, apply and control Primary-Only systems. This second session looks to be equally engaging and enlightening.  We hope you’ll join us!