HPAC Magazine


Article Plumbing

By The Numbers

October 1, 2013 Rod Yeoh

The plumbing implications of green rating systems for existing buildings.

Table 1 - Annual leakage as a consideration for refrigerant conversion
Article HVAC SystemsRefrigeration

For Better Or For Worse…R-22 RIP

October 1, 2013 Dave Demma

As the need for alternates looms, contractors would be wise to develop a comprehensive strategy (Part I).

Figure 1 Tee at Termination Outlet
Article CoolingHeatingHVAC Systems


October 1, 2013 Ian McTeer

Horizontal venting terminations have created a variety of problems. It is time to consider other options.

Article Green Technology

Capitalizing On Greening

September 2, 2013 Steve Goldie

It takes more than technology to produce results.

Figure 1 Fuel cost comparison
Article Hydronics

Increasing The Appeal

September 2, 2013 Mark Evans

More options are emerging for pairing hydronics and renewables.

This ad ran in 1966 in HPAC and shows the ongoing focus on attracting builders to hydronic heating.
Article Hydronics

Looking Back – circa 1964 How to sell hydronics to Canadian builders

September 2, 2013 Al Buschel

An expert brings out some points you may have overlooked.

Article Hydronics

The Variable Flow Renaissance

September 2, 2013 Steve Thompson

The Pump Guy looks at the end game: modulating flow effectively.

Figure 1 Improper installation of a mixing valve.
Article Hydronics

Getting It Right

September 2, 2013 Mike Miller

Strategies to maximize radiant system effectiveness.

Figure 1 Use of a 4-way valve
Article Hydronics

Changing Direction

September 2, 2013 John Siegenthaler

How flow reversal can be used in hydronic systems.



June 1, 2013 Bill Roebuck

The practicality of cargo vans as service vehicles is expanding as manufacturers turn their attention to competing with the enormous Sprinter.


Ignore Pressure Differentials At Your Peril

June 1, 2013 Robert Bean

The unintended consequences of monster-size range hoods.

Table 1
Article CoolingHVAC Systems

Condenser Water System Savings

June 1, 2013 Mick Schwedler and Beth Bakkum

Optimized flow rates in the condenser water system provide installed and operating cost savings in chilled-water systems. This article discusses flow rate selection and offers options to consider for implementation in specific circumstances.


Getting The Job Done

June 1, 2013 Hank Bulmash

Infrastructure and skills development figure prominently but has the groundwork been done? Insights into the 2013 Federal Budget.

Each workstation has its own water heater.
Article Plumbing

Simple system garners big savings

June 1, 2013 Luc Boily

Knowing that drinking water is not a boundless resource, a group of plumbing and heating teachers involved in the eastern Montreal vocational training school Centre Daniel-Johnson* developed a water-conserving system for the workstations. Daniel Savard, a plumbing and heating instructor

Scheideman hangs an evaporator on a freezer at the 2012 Alberta skills competition.
Article Forced AirRefrigeration

Duo set to represent Canada in Germany

June 1, 2013 Patrick Callan

NAIT grads prepare to test their skills against the world’s best.

Figure 1 Sidearm water heater system.
Article Hydronics

Only As Needed

June 1, 2013 John Siegenthaler

A new approach to on-demand domestic water heating.

Figure 1 System layout: Wood gasification boiler and solar thermal array
Article HydronicsSolar

A Great Marriage

April 1, 2013 John Siegenthaler

How to combine solar collectors and a wood gasification boiler.

A dehumidification system can be an efficient solution to humidity issues caused by daily wash downs, fog and moisture in a food processing facility.
Article CoolingHVAC Systems

Don’t Sweat It

April 1, 2013 David Simkins

Dessicant technology can be a solution to summer humidity issues.

Figure 1 Condenser and evaporator coil in a single unit
Article CoolingHVAC Systems

How To Avoid IT System Failures

April 1, 2013 Eddie Stevenson

Prevent equipment overheating in server rooms using ceiling-mount spot air conditioners.

Figure 1 Cooling tower fan performance
Article CoolingHVAC Systems

Condenser Water System Components

April 1, 2013 Mick Schwedler and Beth Bakkum

An overview of how condenser water system components react to changing conditions.

The long-term health of an air conditioning or refrigeration system is dependent on four things: proper design, quality installation; equipment commissioning, and ongoing preventive maintenance.
Article HVAC SystemsRefrigeration

Cleanliness Is Next To…

April 1, 2013 Dave Demma

Part II-Proper procedures for ensuring a contaminant free installation.

Figure 1 Heating system piping drawing circa 1949
Article Hydronics


April 1, 2013 John Siegenthaler

Look for polymer tubing to soon dominate the market worldwide.

Figure 1 The cost of installation in several communities in British Columbia.
Article EngineeringPlumbing

RFS: Trials, Trends and Tribulations

March 1, 2013 Mark Evans

An update on the status of residential fire sprinkler fire systems in Canada.

Industry Canada tool offers page dealing with HVAC contractors.

Business Analysis 101

March 1, 2013 Hank Bulmash

Benchmarking tool allows you to view financial performance data based on industry averages.

Figure 1 TEVs with contamination issues returned for warranty credit.
Article HVAC SystemsRefrigeration

Cleanliness Is Next To…

March 1, 2013 Dave Demma

PART I: Proper procedures for ensuring a contaminant-free installation.

Large diameter, low speed fans reduced the rate at which Federated Co-operative Ltd.'s warehouse was losing heat.
Article CoolingHeatingHVAC Systems

Movin’ Air

March 1, 2013 Erin Hsu

Destratification can resolve a number of heating and air quality issues.

Figure 1 Series piping layout.
Article HVAC SystemsHydronics

Multiple Boiler Option

March 1, 2013 Mark Norris

When and how to use hybrid systems.

Figure 1 An "unprotected" recirculating domestic hot water system.
Article Green TechnologyPlumbing

Stemming The Flow

March 1, 2013 John Siegenthaler

Balancing a recirculating domestic hot water system.

Article HeatingHVAC Systems

A Two-In-One Seasonal Alternative

February 1, 2013 Clark Michel

Portable heat pump basics.

Outdoor wood-fired heaters present some system design issues.
Article HeatingHydronics

Room For Improvement

February 1, 2013 John Siegenthaler

Outdoor wood-fired heaters bring some baggage to system design.