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Home » Topics » HVAC Contracting

HVAC Contracting
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This shows a technician filling the oil filter cavity after changing the filter cartridge.

Btu Buddy 154: Frozen Oil Line on Oil Furnace

Bill Johnson
January 18, 2016

It was the first really cold day of the winter and Bob and Tim were on the way to a service call on an oil burner. The customer said that they had no heat. It was about 15°F outside so they were in a rush to get there.


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energy recovery ventilator

Don’t Breathe Easy: The Adverse Effects of Poor IAQ

How contaminated indoor air is harming our health, businesses, schools and homes — and what can be done
Nick-Agopian
Nick Agopian
January 18, 2016

What causes poor IAQ? What are the negative effects? And most importantly, what can be done to achieve cleaner indoor air? This article will attempt to shed light on these questions so we can all breathe a little easier.


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Planning for New Overtime Rules

What to expect and how to prepare for the DOL’s changes to the overtime rules
Richard D. Alaniz
January 18, 2016

The U.S. Department of Labor (DOL) announced a revamping of the “white collar” exemptions test. When the changes become effective, employers can expect greater scrutiny and a further increase in wage and hour lawsuits. It is therefore important for employers to understand the upcoming changes to the overtime rules.


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Bitzer two-stage reciprocating compressor

Bitzer Modifies Reciprocating Compressors for R-448A and R-449A Refrigerant

Low temperature applications now able to run with refrigerants under 1,400 GWP
Andrew Gaved
January 18, 2016

Bitzer has announced it has modified all models of its two-stage reciprocating compressors to enable them to run with R-448A and R-449A refrigerant. The refrigerants have global warming potentials (GWPs) of 1,386 and 1,397 respectively.


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Alaska Aces Hockey Team’s ‘Green’ Ice Is a Winner

Sullivan Arena is second rink in the nation to use a CO2-based refrigeration system to generate its ice
January 18, 2016

The Alaska Aces, a professional hockey team in Anchorage, Alaska, and winner of three league-championship Kelly Cups, is skating on “greener” ice this season. It’s not the color of the ice that’s changed, but the effect it has on the environment and its money savings.


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Troubleshooting Challenge: An Under-Performing Heat Pump

Jim Johnson
January 4, 2016

In this troubleshooting situation, you are responding to a customer’s complaint about their heat pump, and you’re not the first technician called in to solve this problem of “not keeping the home comfortable and running a lot.”


Read More
Weil-McLain SlimFit 1500 condensing boilers

Advances in Boiler Construction and Design

The boiler market has been slowly shifting to more efficient condensing units
John Kopf
January 4, 2016

Contractors, architects, engineers, and others who specify commercial and industrial boilers continually seek systems that are more cost effective, energy efficient, and environmentally friendly. The boiler industry has responded by making significant advances in both construction and design.


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Outdated Computer Systems Play Havoc with the Bottom Line

Assessing technology needs can help businesses stay competitive, says tech company president
January 4, 2016

Computer technology is ever-evolving. While that’s exciting for techies, it can be a headache for business leaders, whether they are corporate executives or small business owners.


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European Heat Pump Industry Agrees on Keymark Standard

The Keymark is a quality assurance standard backed by third party testing and factory inspection
Andrew Gaved
January 4, 2016

A group of manufacturers and certification bodies, coordinated by the European Heat Pump Association (EHPA), has agreed to the terms of the Heat Pump Keymark, which the participants say they expect to become the single certificate for heat pumps in the European market.


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Wiegmann Completes Work on LEED-Certified Refrigerated Food Distribution Center

The challenge of this project was designing and modeling the building to meet stringent LEED standards
January 4, 2016

Wiegmann Associates announced it has completed work on a new LEED-certified refrigerated food distribution center for The Chefs’ Warehouse in Las Vegas. As engineer of record and mechanical and controls construction manager, Wiegmann designed and installed all refrigeration systems, HVAC equipment, and a building automation system.


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  • An illustration shows a house with a geothermal heating system. Pipes are depicted running underground.
    Sponsored byClimateMaster

    Residential Tax Credits Are Ending, But Demand Continues

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    Energy Prices, Inflation, and HVAC: What Today’s Homeowners Care About

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    R-455A Refrigeration: A Cold Storage Solution for the Future

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