Compare HVAC Efficiency Options
Facility teams rarely lack ideas for cutting HVAC energy use. Vendors propose new equipment, controls, analytics, coil cleaning programs, coatings and products added to the refrigerant circuit. The hard part is knowing which problem each option actually solves, what it costs in money and disruption, and whether it competes with or complements what you already have. This hub answers those questions with side-by-side comparisons built on public data from DOE, ENERGY STAR, Lawrence Berkeley National Laboratory and Pacific Northwest National Laboratory.
How to use these comparisons
Each page follows the same structure: what each option does, the problem it solves, typical cost, effort and disruption, savings ranges from cited sources, a comparison table, when to choose which, and when to combine them. Where a figure comes from CryogenX4 rather than an independent source, we say so. Where replacement or another measure is the better answer, we say that too.
If you are building a plan from scratch, start with efficiency measures for existing buildings, a ranked menu from no-cost operations fixes to full equipment replacement. If you are weighing a specific proposal, go straight to the matching comparison.
Three ideas that run through every page
1. Different measures fix different surfaces and systems
A coil has an air side and a refrigerant side. Coil cleaning and coatings work on the outside; an internal oil-fouling treatment is aimed at the inside. Controls and drives change how much a system runs; equipment-condition measures change how efficiently it runs. Retro-commissioning fixes how the whole building operates. Because they work on different things, most of these options are complementary, not competing.
2. Sequence matters
ENERGY STAR's staged approach puts retro-commissioning first and heating and cooling plant last, because each stage changes the loads the next one sees. Fix operations before buying equipment, and right-size replacements to the corrected load.
3. Measure on your own equipment
Savings cannot be metered directly; they are calculated against a baseline. The International Performance Measurement and Verification Protocol (IPMVP) describes how. Any vendor, including CryogenX4, should be willing to measure results on your units under comparable conditions. Percentages from different measures also cannot simply be added, because measures interact.
Where CryogenX4 fits
CRYOGENX4 is a one-time treatment that, according to the company, is installed while the system runs with no downtime, lifts insulating oil film from internal heat-exchanger surfaces and returns it to the compressor sump, conditions the metal for better heat transfer, and improves the lubricity of the existing oil. CryogenX4 reports energy savings of up to 30% and a typical payback of 12 to 36 months on the treatment. Results vary by equipment condition. It does not fix failing compressors, refrigerant leaks, dirty fins or bad control sequences, which is exactly why these comparisons exist.
For background on the problem, see what oil fouling is; for evidence standards, see how HVAC energy savings are measured; and for the product itself, how CRYOGENX4 works.
Evaluate Evaluate your options
For when you are diagnosing a problem or weighing solutions.
Decide Make the decision
Numbers, proof and next steps for a project you are ready to scope.
CryogenX4 vs. Equipment Replacement: When to Treat, When to Replace
A fair comparison of restoring an existing system with a one-time treatment versus buying new equipment, including the cases where replacement is clearly the right call.
Read the guide →DecideCryogenX4 vs. Coil Cleaning: Two Different Surfaces
Coil cleaning and oil-fouling treatment work on opposite sides of the same tube wall. Here is what each one fixes, what the research says, and why they are complementary.
Read the guide →DecideCryogenX4 vs. Other Refrigerant Additives: A Category Comparison
Not all products added to a refrigerant circuit are alike. A category-by-category comparison of sealants, oil additives, dyes and oil-fouling treatments, with the evidence to ask for.
Read the guide →DecideCryogenX4 vs. VFDs and Controls: Complementary, Not Competing
Variable frequency drives and controls change how much work an HVAC system does. An internal treatment targets how efficiently it does that work. Here is how they compare and stack.
Read the guide →DecideCryogenX4 vs. Retro-Commissioning: Operations vs. Internal Condition
Retro-commissioning tunes how the whole building operates and is one of the best-documented efficiency measures. Here is how it compares with, and complements, an internal oil-fouling treatment.
Read the guide →DecideOil-Fouling Treatment vs. Refrigerant Sealant: Not the Same Thing
Leak sealants and oil-fouling treatments both go into the refrigerant circuit, but they do opposite jobs and carry very different risks. A plain comparison, with the 2026 leak-repair rules.
Read the guide →DecideCryogenX4 vs. Coil Coatings: Protecting the Outside, Treating the Inside
Coil coatings protect fins from corrosion or manage condensate on the air side. An internal treatment targets oil film inside the tubes. Different problems, often worth solving together.
Read the guide →Frequently asked questions
Is CRYOGENX4 a replacement for maintenance, controls or new equipment?
No. It addresses one specific cause of lost performance, internal oil film and friction, according to the company. Maintenance, controls and timely replacement remain necessary.
Which efficiency measure should I do first?
In most existing buildings, operations: retro-commissioning and control tune-ups. They have the best-documented cost-effectiveness and change the loads every later measure works against.
Do these pages name competing products?
No. Comparisons are by category, such as leak sealants or oil additives, so you can judge any product on what it does and the evidence behind it.
Where do the cost and savings figures come from?
From public sources including DOE FEMP, the ENERGY STAR Building Upgrade Manual, LBNL and PNNL studies. Each page lists its sources and dates; some figures are from older reports and are labeled accordingly.
How do I test CRYOGENX4 without a large commitment?
Run a pilot on a few sound units with a documented baseline and before-and-after measurement under comparable conditions.
Sources
- ENERGY STAR Building Upgrade Manual (2008 edition) — U.S. EPA ENERGY STAR, hosted by the Whole Building Design Guide
- Building Commissioning: A Golden Opportunity for Reducing Energy Costs and Greenhouse Gas Emissions in the United States — Lawrence Berkeley National Laboratory (E. Mills)
- Field Evaluation of Advanced Controls for the Retrofit of Packaged Air Conditioners and Heat Pumps — Pacific Northwest National Laboratory
- Operations & Maintenance Best Practices: A Guide to Achieving Operational Efficiency, Release 3.0 — U.S. DOE Federal Energy Management Program / Pacific Northwest National Laboratory
- International Performance Measurement and Verification Protocol (IPMVP) — Efficiency Valuation Organization
- Schools Chiller Replacement Package: Performance Requirements, Savings and Costs (Version 1.0) — U.S. DOE Building Technologies Office / Lawrence Berkeley National Laboratory
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.