Showing posts from November, 2012

Checklist for HVAC

This checklist is based on this one from the EPA. Outside Air Intake
LocationOpen during occupied hours?Unobstructed?Standing water, bird droppings in vicinity?Odors from outdoors? (describe)Carryover of exhaust heat?Cooling tower within 10m?Exhaust outlet within 10m?Trash compactor within 10m?Near parking facility, busy road, loading dock?Bird screen
Unobstructed?General condition?Size of mesh? (12mm minimum)Outside Air Dampers
Operation acceptable?Seal when closed?Actuators operational?Outdoor Air (O.A.) Quantity (Check against applicable codes.)
Minimum % O.A.Measured % O.A.Note day, time, HVAC operating modeMaximum % O.A.Is minimum O.A. a separate damper?For VAV systems: is O.A. increased as total system air-flow is reduced?Mixing Plenum
Clean?Floor drain trapped?Airtightness
Outside air dampers.Return air dampers.Exhaust air dampers.All damper motors connected?All damper motors operational?Air mixers or opposed blades?Mixed air temperature control settingFreeze stat settingIs mixing ple…

Example CRAMM analysis mind map


A Bartels in Harare

Lyn Bartels de Jong at the historic moment of the signing of the Memorandum of Understanding between Tsvangirai and Mugabe in Zimbabwe.