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Helper and Laborer Pay Is the Early Warning of Skilled-Trade Wage Inflation
NewsMay 27, 2026

Helper and Laborer Pay Is the Early Warning of Skilled-Trade Wage Inflation

A 24-year analysis in the Journal of Management in Engineering shows unskilled construction wages predict skilled-trade pay bumps that follow — giving shop owners a bid-pricing signal.

Mechanical Ventilation Cuts School HVAC Energy 80% While Hitting IAQ Targets
NewsMay 26, 2026

Mechanical Ventilation Cuts School HVAC Energy 80% While Hitting IAQ Targets

Peer-reviewed research across 11 climate zones shows mechanical ventilation with CO2 demand control slashes school HVAC energy use without sacrificing indoor air quality.

Rotary Gas Pressure Exchanger Lifts Transcritical CO2 Supermarket COP by 19%
NewsMay 25, 2026

Rotary Gas Pressure Exchanger Lifts Transcritical CO2 Supermarket COP by 19%

Applied Thermal Engineering 2024 reports an 18.2% COP gain from pairing a rotary gas pressure exchanger with two low-lift ejectors in a transcritical CO2 refrigeration rig.

Two-Stage R-290 Liquid-to-Liquid Heat Pump Boosts Cold-Climate Heating 18%
NewsMay 24, 2026

Two-Stage R-290 Liquid-to-Liquid Heat Pump Boosts Cold-Climate Heating 18%

Purdue researchers report a variable-speed two-stage propane heat pump delivering 18.3% higher heating capacity and 5.8% better COP at -8.3°C than a single-stage design.

CFD Study: A3 R-290 Formed Flammable Zones in Auto AC Leaks — A2L R-1234yf Did Not
NewsMay 23, 2026

CFD Study: A3 R-290 Formed Flammable Zones in Auto AC Leaks — A2L R-1234yf Did Not

A 2024 International Journal of Refrigeration paper by Wang and colleagues simulated R-1234yf (A2L) and R-290 (A3) evaporator-outlet leaks in automotive AC. R-1234yf stayed below its LFL; R-290 exceeded it at every monitoring point. The result is a useful nuance for techs preparing to handle A2L and A3 refrigerants.

R-454B Delivers 38% Higher EER Than R-410A in Data-Center Rack Cooling Tests
NewsMay 22, 2026

R-454B Delivers 38% Higher EER Than R-410A in Data-Center Rack Cooling Tests

A 2025 Applied Thermal Engineering study benchmarked R-454B against R-410A across 24 in-rack tests and found a 38% EER advantage at 9 kW with comparable PUE.

Popular Repair Guides

Building a Referral Network with Realtors and Property Managers: The Most Profitable Customer You're Not Chasing

Realtors and property managers are the highest-value referral sources in the appliance repair business — high volume, recurring, and pre-sold on your services. Here's how to approach them, what they actually care about, and how to build relationships that generate calls for years.

Commercial Kitchen Equipment: What Residential Techs Need to Know Before Taking the Call

Higher voltages, BTU ratings that dwarf residential equipment, three-phase power, and certification requirements that can create serious liability. Here's what residential appliance techs need to understand before crossing into commercial kitchen work — and which crossover repairs are safe to take.

Five Appliance Maintenance Tasks Most Homeowners Overlook

Dryer vent clogs, dirty refrigerator condenser coils, a clogged dishwasher filter, a neglected washer door gasket, and a filthy range hood filter. Five tasks that take under an hour total and prevent the majority of appliance service calls.

Common HVAC Electrical Failures: Contactors, Capacitors, Relays, and More

Contactor pitting, capacitor degradation, blower motor relay failures, transformer burnout, and low-voltage wiring faults account for the majority of HVAC no-cool and no-heat calls. Here's the systematic diagnostic approach that keeps you safe and efficient.

How to Read Your Appliance Model and Serial Number: A Brand-by-Brand Guide

Every major appliance brand hides its model and serial tag in a different spot. Here's where to find it on every brand, how to decode the manufacture date from the serial number, and why it matters when you're ordering parts or weighing repair vs. replace.

Whirlpool Cabrio Bearing Replacement: Bearing-Only vs. Full Tub Assembly

The Whirlpool Cabrio (and Kenmore Oasis) bearing-in-tub failure is one of the most debated repairs in the appliance trade. Here's how to diagnose it, what it actually costs, and the bearing-only vs. tub assembly decision that shops get wrong.

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