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HVAC

Modulating Thermostat Firmware Glitch

by walter on Nov.04, 2009, under HVAC

Rheem thermostatLast winter I had an old Rheem gas furnace and air conditioner replaced with what amounts to Rheem’s top of the line air-source heat pump system.  Its a dual fuel heat pump with a modulating gas burner and variable speed fan.  To make that part of the system work required a modulating thermostat and the one Rheem sells is made by White Rodgers (Emerson).  Rheem’s model number is RHC-TST411MDMS.  White Rodgers and Emerson refer to it as “Big Blue” under several different variations.  That stat added $300 to the cost and had a stupid programming glitch in it that came to light with the daylight savings time switch last weekend. [Problem resolved, see updates]

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How The Other Half Lives

by walter on Nov.03, 2009, under HVAC, Lighting, Water Conservation

expensive houseAn interesting project I hope to be involved in has crossed my desk.  Its not every day around here where somebody wants to build a 12,000 sq.ft. home, yet an email arrived from a German architectural firm looking for someone local to perform structural and MEP (mechanical, electrical, plumbing) engineering on such a home.  I won’t be posting any images of the real thing, and I don’t yet know who the owner is, but the photo is similar to the style and here are the specs.

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