What CHP does Combined Heat and Power (CHP), or cogeneration, produces electricity and useful heat from a single fuel source. Instead of venting engine or turbine exhaust and jacket heat, a CHP plant captures it for space heating, process steam, or domestic hot water - lifting total fuel efficiency from ~40% (grid power alone) to […]
Cleanroom HVAC Heat Recovery: Air Quality Without Wasted Energy
The contamination barrier Cleanrooms demand exceptionally high air-change rates - often 20 to 60 air changes per hour - to maintain ISO particle classes. That airflow represents a massive energy stream leaving the facility fully conditioned. Recovering it is essential, but cleanrooms add a hard constraint: supply and exhaust air must never mix. Because cross-contamination […]
California Title 24 Heat Recovery
California Title 24, Part 6 (the Building Energy Efficiency Standards) is the most aggressive state energy code in the U.S., and its 2022 edition — effective 1 January 2023, with a July 2024 Supplement — puts heat recovery at the center of both nonresidential and multifamily compliance. This article distills the recovery provisions that trigger […]
Supermarket & Retail Heat Recovery: Refrigeration Meets Ventilation
Two loads, one building Supermarkets and big-box retail bleed energy in two ways: refrigeration rejects heat constantly, while fresh-air ventilation (bakery, deli, entrances) demands conditioning. Heat recovery bridges them. Ventilation recovery Exhaust from the sales floor is warm and can pre-heat incoming make-up air in winter via a rotary wheel or plate exchanger. In cooling […]
Wastewater Source Heat Recovery: Reusing Drain-Water Energy
The hidden reservoir Showers, wash-down, and process drains leave buildings at 25-40C - warm enough to be a valuable heat source. Wastewater (drain-water) heat recovery captures it before it disappears down the sewer. How it works Drain-water heat exchangers wrap a coil around or sit inside the greywater stream, pre-warming incoming cold water. Heat pumps […]
Food Processing Heat Recovery: Capturing Process and Exhaust Heat
A heat-rich sector Food plants bake, cook, pasteurize, and chill around the clock. Both the process air and the building exhaust carry large amounts of recoverable energy - often with moisture, grease, or particulates that demand a cleanable, robust exchanger. Technology fit Enthalpic plate or rotary wheels recover both heat and moisture from humid exhaust […]
Hospital Heat Recovery: Ventilation Energy Without Compromising Air Quality
Why hospitals recover heat Hospitals run 24/7 with very high fresh-air rates - operating theatres, isolation rooms, and wards all demand conditioned outdoor air. Ventilation can be 30-50% of a hospital's energy bill. Air-to-air recovery cuts that load sharply, but infection control sets a hard rule: supply and exhaust must never mix. The safe choice: […]
Building Decarbonization Heat Recovery
Building decarbonization means cutting the fossil-carbon intensity of how a building is heated, cooled, and powered. Heat recovery is the cheapest decarbonization step there is — it shrinks the load before you ever pay for clean supply. This article frames recovery inside the electrify-and-recover strategy. Recovery First, Then Electrify The decarbonization sequence that costs the […]
Passive House Heat Recovery
The Passive House (Passivhaus) standard — from the Passive House Institute (PHI) in Darmstadt — is the most demanding envelope-and-services benchmark in buildings, and continuous ventilation with heat recovery is mandatory. This article covers the recovery requirements and how they compare with code minimums. Core Recovery Requirement Metric PHI limit Sensible heat recovery efficiency (HRV/ERV) […]
RESET Air Standard
RESET Air is the world’s first sensor-based, performance-driven indoor-air-quality certification. Its Commercial Interiors v2.0 standard is about continuous monitoring and transparent reporting, not a one-time design check. This article summarizes the monitored parameters and the targets a space must hold. What Gets Monitored RESET requires continuous monitors covering at least 80% of occupants across all […]