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Bad HVAC Sensors and Forgotten Overrides That Waste Energy
A plausible reading can still drive the wrong HVAC response. Check sensor accuracy and placement, trace points to the right equipment, and return justified temporary overrides to verified automatic control.
Oct 45 min read
After-Hours HVAC Waste: A One-Week Schedule Audit
Compare occupancy with actual equipment operation in a focused one-week audit. Check schedules, overrides and optimal start, protect required services, and measure the result honestly.
Oct 45 min read
Simultaneous Cooling and Reheat: Finding Avoidable HVAC Waste
Comfortable rooms can conceal excess reheat. Follow the air path, separate necessary dehumidification from control faults, and verify valves, minimum airflow and temperature reset before changing settings.
Oct 45 min read
Ductwork Popping at Startup: Pressure or Thermal Movement?
A duct bang at blower startup needs different evidence from a tick during warm-up. Follow a focused investigation of panel movement, local pressure, thermal restraint and repair verification.
Oct 45 min read
Air Balancing (TAB) Toolkit: From Site Readings to a Clear Report
Bring air-side TAB readings, instrument records, tolerance checks and deficiencies into one reporting workflow with Nexora’s Excel workbook and 20-page pocket field handbook.
Oct 35 min read
Cool Savings: A Practical AC Money-Saving Handbook for Homes and Small Businesses
A practical introduction to Cool Savings, the 55-page AC money-saving handbook. Build an energy-cost baseline, review everyday habits and maintenance, and use worked examples with your own electricity tariff.
Oct 26 min read
HVAC RFI Pack for Clearer Questions and Better Tracking
Prepare clearer HVAC RFIs and keep their progress visible with one editable workbook, including a 500-row register, printable form, dashboard and 64 questions to adapt.
Oct 25 min read
Water Hammer in Chilled-Water Systems: Pump Trips, Check Valves and Safe Transients
A practical guide to chilled-water pump-trip transients: screen rapid velocity changes, specify check-valve dynamics, check high and low pressures, and define a specialist surge study.
Oct 25 min read
Chilled-Water Thermal Energy Storage: Sizing a Stratified Tank for Peak Shifting
Size a stratified chilled-water tank against usable thermal energy, discharge power and temperature limits. Worked examples cover water volume, flow, low delta-T sensitivity and overnight charging.
Oct 25 min read
Waterside Economizers: When Cooling Towers Can Provide Chilled Water
Check whether cooling-tower water can meet the chilled-water requirement, how partial economizing shares the load, and when total plant electricity makes it worthwhile.
Oct 25 min read
Glycol in Chilled-Water Systems: Correcting Flow, Pressure Drop and Chiller Capacity
A practical glycol design workflow, with worked flow, resistance and capacity examples, to keep freeze protection, chiller selection and commissioning on the same basis.
Oct 25 min read
Plate Heat Exchanger Selection for Chilled Water: Approach Temperature and Pumping Trade-Offs
Why a close temperature approach changes exchanger selection, and how to compare the thermal benefit with pressure drop, pumping energy and maintenance access.
Oct 25 min read
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