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DIY Zoning: 7 Years Down The Road
Vadim Tkachenko
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Before we start: questions
Write notes and pass them up so there's a chance to answer them in depth later, online Forgot to ask? Not a problem – send it to the mailing list
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Introduction
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Introduction What DZ is? A Knowledge Base A Temperature Zoning System
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Introduction What DZ is? What DZ is not? A Knowledge Base
A Temperature Zoning System What DZ is not? Can't buy Can't pay anyone to make for you (yet)
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Gestation
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Gestation Iowa house built in 1849 with no A/C
Arizona tri-level – scorching upstairs, freezing downstairs
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Gestation Iowa house built in 1849 with no A/C
Arizona tri-level – scorching upstairs, freezing downstairs Existing solutions: dumb systems, lying salespeople, incompetent consultants
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Gestation Iowa house built in 1849 with no A/C
Arizona tri-level – scorching upstairs, freezing downstairs Existing solutions: dumb systems, lying salespeople, incompetent consultants Last straw: “You're too $^&* smart, we're not gonna do business with you”
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Inception
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Inception What one can't buy, one has to make KISS and cheap
Proper way to eat the elephant: one bite at a time Therefore, “The Seven Steps”
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Technicalities
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Technicalities Step 1: Sensor Network Cheap: $3 1-Wire sensors
Distributed Autoconfiguration, capabilities discovery Heterogeneous
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Technicalities Step 1: Sensor Network Step 2: Data Acquisition
Cheap: $3 1-Wire sensors Distributed Autoconfiguration, capabilities discovery Heterogeneous Step 2: Data Acquisition rrdtool, xAP, xPL, generic broadcast
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Technicalities Step 3: Visualization Too many ways You'd be surprised
Long term trends important Stop, think, fix obvious problems
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Technicalities Step 4: Dampers R/C Servos Cheap “Worse Is Better”
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Technicalities Step 5: Core Logic Container architecture
Unlimited zones Arbitrarily complex schedules Pluggable control strategies
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Technicalities Step 6: Passive Mode No need to fiddle with HVAC
May just work for you Gets insurance off your back
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Technicalities Step 7: Total Control STOP!
Abandon hope, all ye who enter here You must understand the consequences They will be after you if something goes wrong
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Technicalities Beyond All kinds of sensors, not just temperature
Fault tolerance: can of worms Home automation integration Remote access Family friendly controls
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Denial
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Denial HVAC contractors: “This is more complicated than rocket science” Not really, but close enough
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Denial HVAC contractors: “This is more complicated than rocket science” Not really, but close enough “Get out of our business and stay out” I don't think so
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Denial HVAC contractors: “This is more complicated than rocket science” Not really, but close enough “Get out of our business and stay out” I don't think so It is too complicated for them, too
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Acceptance
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Acceptance Top link on Google for “temperature zoning”
Ahead of Honeywell, Carrier, Trane, Arzel Zoning and others (they do this for living) Respected by HVAC contractors
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Side Effects You can be sure you did something good when it turns out you've been ripped off Imitation, flattery, Honeywell thermostats
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Side Effects You can be sure you did something good when it turns out you've been ripped off Imitation, flattery, Honeywell thermostats They still haven't called
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Side Effects You can be sure you did something good when it turns out you've been ripped off Imitation, flattery, Honeywell thermostats They still haven't called Big, bad wolf out there
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Side Effects You can be sure you did something good when it turns out you've been ripped off Imitation, flattery, Honeywell thermostats They still haven't called Big, bad wolf out there Chilling effect: most of research is private now
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Maturity
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Maturity Monolithic became modular Centralized became distributed
“Do all things poorly” became “do one thing, do it good”, many times over “Need to know what great ideas to discard” Interoperability is the key Change of focus: Now that we've taken care of your sinusitis...
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Enterprise Ramifications
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Enterprise Ramifications
Parallel semantics perfected Distributed semantics uncovered Fault tolerance is most stringent There is no such thing as too much monitoring JMX instrumentation helps Long term trends important: visualize! Component model and pattern reuse
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Google search “temperature zoning”
Questions? DIY Zoning Google search “temperature zoning”
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