HVAC-R Efficiency Resources
Practical, sourced guides for the people who run cooling equipment and pay for it: facility and energy managers, building owners, property managers and finance teams. 69 guides in six hubs, from why systems lose efficiency to how to prove savings and build the business case.
Why HVAC-R efficiency drops over time, what oil fouling is and how to spot lost capacity.
Equipment-by-equipment guidance, honest answers on additives, warranties and compatibility, and how savings are measured.
A savings calculator, incentives, comparisons with the alternatives, and how a pilot runs.
Why HVAC-R Systems Lose Efficiency
Oil fouling, wear, heat transfer and the warning signs of lost capacity.
- Why HVAC-R Efficiency Declines With Age
- What Is Oil Fouling in HVAC-R Systems?
- How Compressor Oil Migrates Through an HVAC-R System
- How HVAC Coils Transfer Heat, and What Degrades It
- 10 Signs Your HVAC-R System Is Losing Capacity
- Why Cooling Costs Keep Rising, and How to Separate the Causes
HVAC-R Efficiency by Equipment Type
Chillers, rooftop units, split systems, VRF, heat pumps and refrigeration.
- Water-Cooled Chiller Efficiency: How It Degrades and How to Measure It
- Air-Cooled Chiller Efficiency: What Degrades It and How to Measure It
- Rooftop Unit (RTU) Efficiency: Why It Slips and How to Find the Losses
- Split-System Air Conditioner Efficiency: Causes of Decline and What to Check
- VRF System Efficiency: Long Piping, Oil Return and Performance Over Time
- Heat Pump Efficiency in Cooling and Heating: What Degrades It and How to Track It
Proof, Testing & Measurement
How savings are measured, what lab tests prove, and the questions to ask.
- How HVAC Energy Savings Are Measured
- IPMVP Options A, B, C and D Explained
- Baselines and Weather Normalization
- How to Read an M&V Report
- What a CryogenX4 Pilot Measures
- Laboratory Testing Standards: What Each Test Proves
HVAC ROI, Incentives & Compliance
Savings calculator, payback, Texas utility incentives, tax and emissions rules.
- HVAC Savings Calculator
- How to Calculate HVAC Energy Savings
- Payback, ROI, NPV and IRR for HVAC Efficiency Projects
- Capex vs. Opex: How to Budget HVAC Efficiency Decisions
- Texas Utility Commercial Efficiency Incentives (2026 Guide)
- Custom Utility Rebates and Measurement & Verification
HVAC Efficiency Guides by Industry
Healthcare, hotels, offices, government, grocery, data centers and more.
- HVAC Energy Efficiency for Hospitals and Healthcare Facilities
- HVAC Energy Efficiency for Hotels and Hospitality
- HVAC Energy Efficiency for Office Buildings
- HVAC Energy Efficiency for Government and Public Facilities
- HVAC Energy Efficiency for Schools and Universities
- Refrigeration and HVAC Efficiency for Grocery Stores and Supermarkets
Compare HVAC Efficiency Options
Treatment vs replacement, coil cleaning, controls, retro-commissioning and other additives.
- CryogenX4 vs. Equipment Replacement: When to Treat, When to Replace
- CryogenX4 vs. Coil Cleaning: Two Different Surfaces
- CryogenX4 vs. Other Refrigerant Additives: A Category Comparison
- CryogenX4 vs. VFDs and Controls: Complementary, Not Competing
- CryogenX4 vs. Retro-Commissioning: Operations vs. Internal Condition
- Oil-Fouling Treatment vs. Refrigerant Sealant: Not the Same Thing
Still have questions?
The FAQs cover the basics, How It Works explains the technology, and the blog has shorter articles.
See what your equipment could save
CryogenX4 is a one-time treatment installed while your system runs. Start with a pilot on a few units, measured against a baseline, before you commit to a building or a portfolio.