HPAC Magazine


Article ControlsEngineeringHydronics

Changing flow direction for optimal heat exchanger performance

October 26, 2016 by John Siegenthaler

Many systems with renewable energy heat sources also have large thermal storage tanks. Examples include systems using biomass boilers and solar thermal collectors. I call these heat sources “wild” since they can operate over a wide range of conditions and

News HPAC GeneralHydronics

Siegenthaler to lead two sesssions at Canadian Hydronics Conference

April 21, 2016

The Canadian Hydronics Council has announced that the second Canadian Hydronics Conference will be held in conjunction with the CIPHEX West 2016 trade show, November 2 to November 3 at the Vancouver Convention Centre.  The conference features 11 hours of

News CoolingForced AirGreen TechnologyHeat PumpsHeatingHVAC SystemsHydronicsPlumbingRefrigeration

Contractor and CE numbers up at CMPX

April 5, 2016

Sponsors of the 2016 Canadian Mechanical Exposition & Trade Show and Learning Forum (CMPX) have reported increases in key attendee categories including contractors (+14 per cent ) and consulting engineers (+73 per cent). Official attendance figures were unavailable at press

John Siegenthaler (l) with Gregory Trifonidis of Axon Electrical Mechanical Ltd. in Scarborough, ON, who was the winner of the Heating With Renewable Energy draw on March 16.
News Green TechnologyHeat PumpsHPAC GeneralHVAC SystemsHydronics

CMPX visitors hit the jackpot with HPAC contests

March 23, 2016

At the recent CMPX show, HPAC held contests for visitors to its booth. Three lucky winners received a copy of John Siegenthaler’s latest book Heating With Renewable Energy. Siegenthaler was on hand on March 16, 17 and 18 to talk

Le magazine PCC de juin peut tre consult/tlcharg en ligne depuis la semaine passe.
News CoolingForced AirGeothermalHeat PumpsHeatingHPAC GeneralHVAC SystemsHydronicsPlumbingRefrigeration

Le magazine PCC de juin

June 9, 2015

Le magazine PCC de juin peut être consulté/téléchargé en ligne depuis la semaine passée. La version papier sera postée au début de la semaine prochaine. Si vous ne le recevez pas et que vous oeuvrez dans l’industrie, vous pouvez vous

Article Hydronics

Energy & Power

August 2, 2014 by JOHN SIEGENTHALER

The terms are different but related

Visit the HPAC team at booth #437.
News CoolingForced AirGeothermalHeat PumpsHeatingHPAC GeneralHydronicsPlumbingSolar

CEU Credits available for ASPE members at CIPHEX West, ASPE to hold inaugural Toronto Chapter meeting

July 30, 2014

Produced by the Canadian Institute of Plumbing and Heating (CIPH), Western Canada’s largest plumbing and HVAC/R event will take place on November 5 and 6 in Calgary, AB. The two-day trade show will host more than 200 exhibitors and includes

Figure 1 Radiant ceiling system design
Article CoolingHydronics

I Need This Controller…


Expanding the possibilities for radiant ceilings with a “year round” controller.

News CoolingForced AirGeothermalHeat PumpsHeatingHPAC GeneralHydronicsPlumbingRefrigerationSolar

CMPX opens this Wednesday

March 17, 2014

CMPX 2014 opens this Wednesday, March 19 and show organizers tell us there is still time to register online and bring your team. Online registration will remain open until the close of business on Tuesday, March 18 and those registrants’ badges

Figure 1 Piping Schematic
Article Heat PumpsHydronics

Heat Pump Plus

February 2, 2014 by John Siegenthaler

How to combine an air-to-water heat pump with a boiler (Part II).

Figure 1
Article Solar

Glancing Blow

December 1, 2013 by JOHN SIEGENTHALER

Working with the incident angle modifier.

John Siegenthaler (l) and Robert Bean opened Modern Hydronics The Summit with their presentation on trends to watch for in hydronics.
News CoolingGeothermalHeat PumpsHeatingHPAC GeneralHVAC SystemsHydronicsSolar

Hydronics event attracts a full house

September 17, 2013

Modern Hydronics The Summit wrapped up to great reviews.

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

A Great Marriage

April 1, 2013 by John Siegenthaler

How to combine solar collectors and a wood gasification boiler.

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

Room For Improvement

February 1, 2013 by John Siegenthaler

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

News CoolingEngineeringGreen TechnologyHPAC GeneralHVAC Systems

Chiller efficiency improvements proposed for Standard 90.1

December 17, 2012

Chiller efficiencies for air and water cooled chillers would be boosted to more than 20 per cent under a proposed addendum to the ASHRAE/IES Standard 90.1-2010, Energy Standard for Buildings Except Low-Rise Residential Buildings. The addendum changes the requirements for

Complex piping system.
Article Hydronics

14 years of hydronics

November 1, 2012 by John Siegenthaler

A comparison of the hot topics of the past, the present and, most importantly, the future.

Figure 2 Impact of ELWT on water to water heat pump COP.
Article Hydronics

Onward & Downward

September 1, 2012 by John Siegenthaler

The future of hydronics is all about low water temperatures.

Figure 1 Combined solar thermal and geothermal system
Article GeothermalGreen TechnologyHVAC SystemsSolar

Geo-Solar Connection

September 1, 2012 by hpac

Two thermally-based renewable energy technologies that grab many headlines these days are solar water heating and geothermal heat pumps. Both of these technologies are ways of capturing solar energy. The solar thermal system does it in real time, whereas the

News GeothermalHeat PumpsHPAC GeneralHVAC SystemsHydronicsSolar

Hydronic workshops showcase renewable energy applications

April 10, 2012

Sustainability, innovation and new technology will be the focus of the 2012 edition of the CIPHEX West trade show in Vancouver.  The largest event in Western Canada for plumbing, HVAC/R and water treatment, CIPHEX West will take place at the

Figure 1
Article Green TechnologyHVAC SystemsSolar

Time Well Served

April 1, 2012 by John Siegenthaler

After 30 years it was time for a collector transplant.

Figure 1 Boiler and storage tank piping
Article Hydronics

Lowering the Limit

April 1, 2012 by John Siegenthaler

How to extract more heat from a storage tank.

Article HVAC SystemsHydronics

Modern Hydronics 2012

January 1, 2012 by hpac

Celebrating 15 years.