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“Do I really need a hydro-pneumatic tank on my variable speed pressure booster?”
It’s a question many engineers will ask, particularly after ASHRAE 90.1 – 2010 takes effect in commercial building codes as early as October of this year. As we discussed in an earlier blog on variable speed pressure boosting, the new ASHRAE standard no longer permits pressure reducing devices to reduce the pressure of water supplied by booster system pumps. This essentially puts an end to constant speed pressure boosting, which brings variable speed to the forefront. But since the whole point of variable speed pumping is to more accurately align demand with supply, why would hydro-pneumatic tank still be required?
Bell & Gossett’s System Syzer does all the piping calculations necessary to meet ASHRAE 90.1 and 189.1 requirements. JMP is committed to getting all our customers up-to-speed on ASHRAE 90.1 – 2010. We’ve already covered some of these topics in previous blogs, including changes to pressure booster design. Today’s blog focuses on the portions of 90.1 - 2010 that dramatically impact the selection of pumps and associated piping.
Read MoreThe clock was ticking in more ways than one for the Holiday Inn in Downtown Knoxville, Tennessee this past August. 
With only weeks to go before the first 2012 home game between the University of Tennessee and Georgia State, the hotel was in the midst of a complete domestic hot water retrofit.
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