HPAC Magazine


Make your requirements known within plans and specifications if you want to avoid the pitfalls of deeper tubing.
Article Hydronics

Tubing depth matters!

October 1, 2015 John Siegenthaler

It is time to find better ways of ensuring that tubing and reinforcing mesh end up near the mid-height of the slab.

Article HVAC Systems

In a field of its own

October 1, 2015 Robert Bean

Standard practice for evaluating residential indoor air quality concerns.

Figure 1
Article CoolingGreen TechnologyHVAC SystemsRefrigeration

What Is going on in the world of Supermarket Refrigeration?

October 1, 2015 Dave Demma

It comes as no surprise to anyone that supermarkets are under pressure to embrace green. As applied to the refrigeration portion of a supermarket this translates into: reduce carbon footprint, lower Global Warming Potential (GWP), reduce refrigerant charge, reduce electrical

Article HVAC SystemsPlumbing

Cross Connection Control Bad And Ugly photo contest wrap up

October 1, 2015 by hpac

In the world of potable water protection and backflow prevention, a certified specialist tester or inspector will find cross connections that are controlled, and in too many cases, a bad cross connection with no control. In a bid to address

Heating system design should take into account the replacement of the energy leaking through walls, ceilings, floors and openings in the building envelop.
Article CoolingHeatingHVAC SystemsHydronics

Understanding and measuring energy transfer

October 1, 2015 Gilles Legault

It is crucial to calculate the load when designing a heating system.

Article Plumbing

Quality, clean and timeless

October 1, 2015 Beth McKay

Innovation is the hallmark of today’s bathrooms.

Article HVAC SystemsPlumbing

Myths & misconceptions

October 1, 2015 Tim Keane

Understanding the true nature of outbreaks associated with building potable water systems.

Paul Myers stands beside his company van outside of Lions Gate Hospital. Photo Lions Gate Hospital Foundation.
Article ManagementPlumbing

Plumber shares his good fortune

October 1, 2015 by hpac

Hospital redevelopment gets $25-million shot in the arm from HVAC entrepreneur.

Photo courtesy Square
Article Management

How to manage payment data

October 1, 2015 Jacob Stoller

A look at the widening scope of online payment services provided by financial institutions.

Employers must have a strategy to manage issues around medical marijuana.
Article Health & SafetyHuman ResourcesManagement

Your new drug plan

August 1, 2015 Joe Terrett

Medicinal weed is moving into the mainstream and employers must have a strategy in place to manage the inevitable issues.

Sprinkler systems in single-family homes should be an option that more people ought to consider when building or purchasing a new home.
Article HVAC SystemsPlumbing

The case for residential sprinkler systems

August 1, 2015 Steve Goldie

There is a dual benefit to adding fire protection system installation to your service offering.

Figure 1 Tube spacing and circuit water temperature
Article EngineeringHydronics


August 1, 2015 John Siegenthaler

Systems do not have to be complex to be sophisticated.

Figure 1 Air system (Mechanical Room One)
Article EngineeringGreen TechnologyHydronics

How To Deal With Ramped Up Loads

August 1, 2015 by hpac

Jevons’ paradox is alive and well in high performance homes.

Outdoor concrete surface with embedded PEX tubing.
Article Hydronics

Tips For Successful Installations

August 1, 2015 Lance MacNevin

How to integrate SIM into almost any outdoor surface.

CSA standard
Article Hydronics

A Shot In The Arm

August 1, 2015 Mark Evans

Point-of-use energy consumption measurement removes bias against hydronic systems.

Figure 1 Direct return, two pipe system
Article Hydronics

What Are Your Options?

August 1, 2015 Mike Miller

Knowledge is power when it comes to distribution piping design.

We are in the information age and data exchange is at the very heart of that.

Hello Boiler, It’s Wi-Fi Calling

August 1, 2015 Curtis Bennett

A wireless future for the mechanical industry.

Figure 1 Air gases in water
Article Hydronics

I Can’t See Any Air

August 1, 2015 John Siegenthaler

But it is likely still there…

Figure 1 Superheat characteristics of an EEV and TEV
Article HVAC SystemsRefrigeration

Accuracy, Reliability and Repeatability

August 1, 2015 Dave Demma

What steps are necessary to achieve optimum valve performance?

Figure 1
Article Heating

How Much Is Enough?

August 1, 2015 Ian McTeer

Making sense of relative humidity, wet bulb and grains of moisture.

Article Plumbing

Same old, same old

May 1, 2015 STEVE GOLDIE

Soldering basics still apply to lead free pipe, valves and fittings.

Figure 1 Low mass radiant ceiling panel
Article CoolingGeothermalHeat PumpsHydronics

Complementary elements


Combining a geothermal heat pump, boiler and radiant ceiling in one system.

Direct fired make up air unit. Insulated intake air in foreground, supply air in background.
Article Forced AirHVAC Systems

Multi-purpose means multiple challenges

May 1, 2015 ROBERT BEAN

Points to consider when designing industrial and commercial systems.

Mercedes-Benz Sprinter Cargo.
Article Management

Weighing in for the fight

May 1, 2015 BILL ROEBUCK

The aluminum versus steel battle heats up the pickup truck market, while cargo capacity remains the benchmark for big cargo vans.

Shell in tube heat exchanger.
Article CoolingHVAC SystemsRefrigeration

Chiller basics

May 1, 2015 DAVE DEMMA

A review of applications and systems in the field.

Figure 1 Determining frosting potential
Article Forced AirHVAC Systems

Consider the total picture

May 1, 2015 LEN KOBYLUS

Canadian ERV wheel retrofit and specification must consider RER, frosting and maintenance.

Article Green TechnologyHeating

Clean bill of health for Fuel Oil No. 2

May 1, 2015 by hpac

Results of a final screening assessment released by Environment Canada and Health Canada in February reported that exposure from Fuel Oil No. 2 residential tank leaks is not a concern for the health of the general population. The report states

Students in front of the new Shree Madan Asrit Lower Secondary School classroom block. To the left of the children is an old classroom.  Photo: Ashley Bouchard, Raven Supply
Article HydronicsManagement

Committed to reading

May 1, 2015 by hpac

Raven Hydronic Supply Ltd. continues its fundraising initiatives through Room to Read.

Figure 1 Legislative actions involving refrigerant
Article Refrigeration

Considerations for next generation HVAC refrigerants

March 1, 2015 Mike Thompson, Mike Patterson and Ryan Geister

An earlier article in HPAC and in Engineers Newsletter discussed the need for a balanced approach* between environmental impact and efficiency when selecting replacement refrigerants for HVAC equipment. This article continues the refrigerant discussion by addressing safety, regulations and other

Figure 1 Simple distribution
Article Plumbing

Improving distribution system efficiency

March 1, 2015 Amin Delagah

Part II in a series dealing with restaurant hot water systems.