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HPAC05_001.v8.indd 1

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32 HPAC | MAY 2014 HPACMAG.COM

Hydronic heating has long been known for providing superior cold weather comfort. Even so, potential clients – even those who are convinced about the benefits of hydronic heating – often ask: “What

about cooling?”There is a range of solutions depending on budgets, zon-

ing preferences and the equipment used for the heating por-tion of the system. One of the lesser-known possibilities, at least at present, is using a radiant panel as a “heat ab-sorber” for sensible cooling.

LOOKING UPThe term radiant heating makes most people think about warm floors. Although it is certainly true that there are many ex-cellent applications for radiant floor heating, it is not the only type of radiant panel that can deliver comfort.

A hydronic radiant ceiling, when properly applied, serves as an excel-lent low-temperature heat emitter. Some designs, like the panel shown in Figure 1, can deliver a heat flux of 28 Btuh/ft.2 when operating at an average circuit water temperature of 110F. This makes them well suited for use with heat sources such as mod/con boilers, solar thermal collectors and heat pumps.

< RADIANT COOLING

I Need This Controller... Expanding the possibilities for radiant ceilings with a “year round” controller. BY JOHN SIEGENTHALER

Figure 1 Radiant ceiling system design

Installation of radiant ceiling system illustrated in Figure 1.

1/2" drywall3/4" foil-faced polyisocyanurate foam strips

aluminum heat transfer platetube

7/16" oriented strand board

top side insulation ceiling framing

2.5" drywall screws

48 HPAC | MAY 2014 HPACMAG.COM

The Internet of Everything (IoE) is a worldwide phe-nomenon; in fact, a research report released by Raymond James and Associates earlier this year concluded that every day at least 80 “things” con-

nect to the Internet for the first time every second. James re-ports that by 2020 the number of connecting devices will increase to 250 every second. In the last couple of years the once lowly thermostat has become a prime IoE target be-cause, we are told, many consumers want to be directly con-nected to their HVAC systems.

HVAC control manufacturers are producing lines of resi-dential thermostats that can talk to the internet, the so-called smart thermostat. Seemingly ubiquitous wireless network access means homeowners can monitor their HVAC systems from anywhere in the world. The idea is to help householders manage energy consumption by allowing al-most unlimited management opportunities. However, I noted this disclaimer published by one DIY thermostat manufac-turer: “Usage reduction and savings are not guaranteed and are contingent upon, among other factors, customers taking action on proposed opportunities for optimization.” I would argue that only a professionally designed, installed, commis-sioned and maintained system will provide not just a com-fortable home, but the energy savings consumers want.

System design is crucial, especially when you consider a document such as ASHRAE’s Standard 55, which states that “The comfort of a given individual is affected by many vari-

ables: health, age, gender, clothing, activity, and so on. None of which will be identical for all occupants, thus room condi-tions throughout the building must be provided that will sat-isfy so that the majority of occupants will feel comfortable.” While everyone knows that turning the thermostat down a few degrees at the appropriate time will save some energy, many homeowners have come to accept second-rate heating systems that waste energy during every cycle.

No heat distribution system is perfect. Striving for near perfection should be our goal; remember, providing comfort is the primary job of HVAC. Only a properly designed, properly installed, and correctly commissioned system will provide the energy savings all of us want. The day we got away from a centralized heating plant in favour of convoluted distribu-tion systems is the day comfort and efficiency died. It is ridic-ulous to me that a residence with a forced warm air heating system might require a mini split in the second floor master bedroom to overcome a massive temperature difference be-tween the first and second floor. Even a thermostat with the brain of Watson the supercomputer cannot be expected to save energy in such a situation, of which there are many. In a near perfect situation, room occupants will not be aware of equipment noise, heat level or air motion.

Thus, assuming the residential building was designed with a focus on an efficient central heating system, then it is a great candidate for wireless automated technology.

A very successful man who made his fortune in the smart

< AUTOMATION

New Technology Enters The Residential Mix Are you ready for home automation and its implications

for your business? BY IAN MCTEER

Phot

o: Is

tock

phot

o

< PLUMBING

RFS: Trials, Trends and TribulationsAn update on the status of residential fi re sprinkler

fi re systems in Canada. BY MARK EVANS

72 HPAC | MARCH 2013 HPACMAG.COMHPACMAG.COM

The number of NFPA-13D compliant Residential Fire Sprinkler (RFS) systems being installed in single fam-ily homes in Canada is on the rise due to a growth in the number of jurisdictions that have mandated com-

pulsory inclusion of RFS systems. However, up to this point mandatory requirements for RFS systems have come solely from local authorities as there are no compulsory regula-tions requiring RFS systems in any Provincial Building Code or in the National Building Code of Canada.

Established by the National Research Council of Canada (NRC), the Canadian Commission on Building and Fire Codes (CCBFC) develops and maintains Canada's six model construction and fi re codes. The Commission for-mally approves all model code documents and technical revisions prior to publication by the NRC. It receives policy advice from the Provincial/Territorial Policy Advisory Committee on Codes which is made up of representatives from the provincial and territorial ministries responsible for building, plumbing and fi re safety regulation. Changes

on a national level would be infl uenced by the position and recommendations of the CCBFC. Inclusion in the National Building and Fire Codes would be an important step forward as these are the model Codes that largely determine the requirements of Provincial and local Codes across the country.

In the CHBA Report section of the November/December 2012 issue of Home Builder Magazine, there is reference to a 2010 report commissioned by the Canadian Code Centre wherein it was determined that the “cost/benefi t equation for mandatory RFS systems was prohibitive.” According to the article, “The report came under intense criticism from some in the fi re safety community.” The article continues on to say the “A Task Group, which includes a builder (the Technical Research Committee Chair), was asked to review and comment on its fi ndings. A report is expected for the CCBFC this February.” In fact, the task group has met once by teleconference and will meet again late this month (March 2013). No date has been set for delivery of the report.

MODERN HYDRONICS WWW.HPACMAG.COMMH12 | FEBRUARY 2014

>> Snow Melting

SNOW.It is part of nature's beauty, especially in Canada. But for commercial and insti-tutional facilities, it is a

cumbersome winter guest. Building owners and facility manag-ers are well aware of the importance of proper snow removal for safe and easy access, prevention of slip and fall injuries and protection from potential lawsuits.

The conventional methods of snow removal – plowing, shov-eling, salting and sanding – can impose a great financial burden every year. The cost is not just for the labour and materials as-sociated with the removal, but also the wear and tear on the surfaces in and around the structure. Traditional snow-removal methods can even be an environmental challenge if chemicals are used that are either tracked into the building by guests or absorbed into the ground during the spring thaw.

Snow and ice melt basics.

Embedded Systems: A Radiant Concept

BEING IN CONTROLWhen it comes to controlling the system, there are several options to choose from, such as au-tomatic, semi-automatic, manual and idling.

Fully automatic system: a sensor is placed in the ground to detect when snowfall begins. The sensor sends a signal to the heat source to activate the warm liquid flow through the radi-ant tubing. Once the snowfall stops and the sensor is dry and clear from snow and ice, the sensor sends a signal to stop the water flow and shut down the system. This energy-effi-cient method of controlling a snow melt system is typically the most economical as it runs only when needed.

Semi-automatic control: a manual intervention is required to start the system, but a timer is also included that will oper-ate for a preset amount of time and then shut the system off when it times out. This could cause the system to be started

too late and when the timer stops, the system could shut off too early or too late – both undesired outcomes.

Manual control: the system turns on and off with the flip of a switch. While this is by far the most cost-effective option to install with a snow-melt system, it generally costs more to operate. The human interface requirement typically does not align with that of perfect timing to start or stop a system when com-pared to the fully automatic system.

Idling: Another option is to idle the system at a preset temperature, typically 22F to 28F (-5C

to -2C), to ensure it can ramp up quickly in the event of snow-fall. This option is often useful in critical areas that must remain snow and ice free, such as walkways or entryways to buildings. The idle option can be used with either automatic or semi-auto-matic controls.

MH2014_12-13_Miller.indd 12 14-02-07 3:31 PM

52 HpAC | april 2013 hpacmag.com

in part i of cleaniness is Next To... in HPAC's march 2013 issue (see it at www.hpacmag.com) dis-cussed the first steps in the pro-

cess of system cleanliness. part ii reviews pressure and vacuum mea-surements and outlines the steps involved in starting the evacuation pro-cess, with particular attention to the vacuum pump.

pressure MeAsureMentsevery fluid has a distinct pressure-tem-perature relationship whereby the satu-ration (boiling) temperature can be precisely determined for a given pres-sure. it becomes more complicated when discussing air pressure (in rela-tion to system evacuation) as there are several pressure scales that must be used. Figure 6 shows the pressure-temperature relationship for water, with the pressure being expressed in the various units of measurement de-scribed below.

1. PSI: The technician’s gauge mani-fold set consists of a high side gauge and low side (compound)

gauge. The high side gauge and the portion of the low side gauge at 0 or above are expressed in psig (pounds per square inch gauge). The gauge pressure reading is simply that…the pressure which the gauge is read-ing; a partial pressure which shows how far above atmospheric pres-sure the reading is. converting psig to psia (pounds per square inch ab-solute) is done by adding atmo-spheric pressure to the gauge pressure reading; 14.7 psi at sea level.

2. Inches of HG: a barometer is a de-vice used to measure atmospheric pressure. it is constructed from a glass tube, sealed at the top, open at the bottom, with the bottom sit-ting in a mercury puddle. a vacuum occupies the portion of the glass tube below the sealed top and the level of mercury in the tube. atmospheric pressure at seal level will support a column of mercury 29.92" high in the tube. This is where the term inches of mercury ("hg) comes from.

3. Inches of Vacuum: The portion of the compound gauge below 0 psig is used to express a system pressure less than atmospheric pressure. its unit of measurement is inches of hg, but is expressed as inches of vacuum. rather than being a mea-surement of pressure above abso-lute vacuum, it is a measurement of where the pressure is in relationship to 0 psig or atmospheric pressure. a reading of 10" vacuum on the com-pound gauge would indicate that the system pressure is 10" hg. below 0 psig (atmospheric pressure). The conversion between psi and inches hg is roughly 2:1; 10" hg is equiva-lent to five psi, meaning that the system pressure is approximately five psi below whatever atmospheric pressure is.

4. mm Hg./Microns: The compound gauge is only accurate down to 29" hg (at best), and should never be used to determine the system pres-sure while evacuating. The english system of measurement is not par-ticularly convenient when discussing

< ReFRigeRaTiON

cleanliness is next to…Part II-Proper procedures for insuring a contaminant free installation.

bY dAVe deMMA

60 HPAC | MAY/JUNE 2013 HPACMAG.COM

Is anyone else noticing an alarming rise in the misguided use of com-mercial type range hoods inside res-idential buildings? It has always

been a problem but I have recently taken an unusual number of calls from people asking if their already installed monster-size range hoods are going to be OK.

What do they mean by ‘OK’ I ask? I follow up in my most empathetic voice, “Do you know what happens when you try to Hoover up the inside of your home without considering the ramifi ca-tions of pressure differentials?" “Hmmm mumble mumble…pause…ah no” is what I can hear on the other end.

So once again with my soft spoken demeanour, I ask, “So now you want my advice, after you bought it and had it installed, am I right? You should have asked a professional that question be-fore you became enamoured with the manufacturer’s glossy range hood brochure.”

For those looking for a way to explain it to appliance addicts in a consumer- friendly way, tell them sticking a 1200 cfm exhaust fan into a typical residen-

tial kitchen is not like playing with a hairdryer; it is more like having a home appendectomy with the suction side of an industrial grade leaf blower. In my 40 grit opinion, the subsequent health and building problems created should rest squarely on the appliance manu-facturers and their dealers’ shoulders. We have ignorant range hood sales people supported by their just as naïve range hood marketing departments selling range hoods to “doe-eyed” con-sumers. When it comes to building sci-ence all of them put together do not know a water column from a water dispenser.

The HVAC industry needs to step up and tell these range hood vendors that when you extract way more air than you make up, you are going to create HVAC and indoor air quality problems.

Really, what these hood S & M folks (sales and marketing) need is a simple lesson: when extraction trumps make up, holes and cracks become the con-duit to contamination. Why? Because when it comes to buildings you can al-ways count on the inside wanting out,

and the outside wanting in. Just what do these hood salespeople think is go-ing to come through the cracks when you suck the insides out of a home? According to my conversation with one dealer of hoods, it is all fresh air in those cracks…comments like that give me a headache.

At a time when the federal govern-ment is spending our tax dollars on a coast-to-coast “got bad gas” campaign alerting us to the dangers of having radon – an entire appliance in-dustry is fl ogging kitchen bling that en-ables environmental contaminates like gases and particulate matter to enter structures freely.

To put this problem into perspective take a hypothetical 20' x 30' x 9' (6m x 9.14m x 2.74m) kitchen and let’s play my favourite game of, “what if?” What if that 5400 ft3 (153m3) kitchen was sealed up and the 1200 cfm (0.57m3/s) kitchen exhaust fan activated. It would only take 4.3 minutes (5400 ft3/1200cfm) to remove all the air such that the pressure would approach 0 psia (assuming the home was at sea

< HOW I SEE IT

Ignore Pressure Differentials At Your PerilThe unintended consequences of monster-size range hoods. BY ROBERT BEAN

MODERN HYDRONICS www.hpacmag.com MH24 | autuMN 2014

>> Design

I love how Mother Nature every now and again gives us a good old fashioned smack down, just to remind us who is really boss. The ice storms eastern Canada experienced this past winter are a good example, leaving hundreds of

thousands, including yours truly without heat or power. My situation was not as severe as that of many however, having a gas stove we were able to cook and make tea; our standing pilot gas fireplace took the chill off; and our good old fash-ioned chimney vented standing pilot hot water tank gave us hot showers. The situation definitely illustrated the advan-tages of older, simpler technology, and made me wish in the moment at least, that I had an old gravity radiator system in my house. Those old standing pilot millivolt boilers could op-erate without electricity, and the old radiator system could circulate without the aid of pumps simply by relying on the laws of physics, with the heated more buoyant water rising to the top of the system thereby causing the cooler water to return to the boiler creating the natural "gravity" circulation.

Now before you go pulling the circulators off your systems let me clarify, I have not become a Luddite and turned my back on technology. I am simply enjoying a moment of nostal-gia. Losing power has its benefits and brought neighbours together to help one another out, perhaps rekindling a true sense of community. Many families likely pulled out board games that had been gathering dust for too long and redis-covered the joys of a family game night. I am sure many peo-ple have some happy memories of pulling together and cop-ing during this and other blackouts, but I don’t see many

cancelling the utilities and making it a permanent lifestyle choice. Having an old technology boiler system that will still work when the power goes out is definitely desirable, but paying the higher utility bills that go along with it may not be. Unfortunately I see far too many under performing systems out there, and usually not because the technology is lacking, but because it is improperly installed, misapplied, not under-stood and/or under utilized.

In order to understand what I mean, let’s look at some of the most common errors we see and how they negatively af-fect efficiency: oversizing, short cycling, over pumping and improper piping strategies.

Oversizing of boilers continues to be an issue in our indus-try, and in the case of a boiler, bigger is not better. Burner modulation, which is a feature on over 90 per cent of the boilers I sell these days, certainly helps but it does not solve this problem altogether. If a boiler could modulate infinitely, firing once at the beginning of the heating season and never turning off until the spring, this would approach optimal effi-ciency. Multiple boiler plants, operating and modulating to-gether can most closely approximate this, but even so we must be careful not to oversize. I understand nobody wants to be caught short but in truth I have been in this business for almost 35 years and I can count on one hand the number of jobs I have seen where the boiler plant was undersized. An accurate heat loss and properly sized boiler plant is the first step to a truly efficient hydronic system.

The second most common problem I see is directly related

Complex Times Call For Basic Measures

SIEGENTHALER

MCTEER EVANS MILLER DEMMA

BEAN

GOLDIE

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DES SALLES DE BAINS PRÉFABRIQUÉES AU CHUM

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* Previous Show & Tell adsShow & Tell bonus space available for all ad sizes.

Bonus Space - Show & TellOnce a year we provide our clients with the opportunity to “tell their story” and “double their ad space” with HPAC’s long-standing Show & Tell feature. You write it, we print it! In 2016 Show & Tell will be included in our March CMPX trade show issue providing you with bonus space and bonus distribution at Canada’s largest mechanical trade show.

You can also take advantage of Show & Tell in our French-language magazine PCC – translation included!

2016 - the year of the trade show in CanadaWith no less than 4 major trade shows taking place in 2016 we expect you’ll be busy! Let us help maximize your reach. Only HPAC can provide you with bonus distribution at all four events.

CMPX — Canada’s largest mechanical event takes place in March in Toronto and HPAC will feature our long-standing, beloved Show & Tell bonus space opportunity (see below).

MEET — Atlantic Canada’s premier event takes place in May.

CIPHEX West — This year’s western Canada event takes place in November in Vancouver B.C.

Construct Canada — Toronto hosts this huge

trade show catering to residential and commercial contractors and engineers. Taking place in December, it’s a great way to end your year.

@

Do your best work.

HPAC02_22-27_Siggy.indd 25 15-03-11 9:04 AM

24 HPAC | MARCH 2015 HPACMAG.COM

TAC

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Taco’s new complete line of Variable Speed, ECM High-Efficiency Circulators

Taco is a leader in advanced equipment for leading-edge commercial and residential hydronic systems. We offer the most comprehensive selection of hydronic system components available from a single supplier.

As the Hydronic System Experts, Taco understands the key role high-efficiency circulators play in the overall success of any system.

The Viridian® - VR1816 is an infinitely variable speed, permanent magnet ECM motor, wet rotor circulator. It uses up to 85% less power - with the highest pump efficiency in its class. The infinitely variable speed settings allow fine tuning of the flow for any system. Plus, like all Taco components, it’s user-friendly, simple to install and operate.

The Viridian® - VT2218 is a temperature-sensing, variable speed, wet rotor circulator. Its high-efficiency permanent magnet ECM motor uses up to 85% less power than conventional pumps. Operating modes include Delta-T, 4 fixed speeds, set-point heat, set-point cool and boiler protection. Delta-T operation maximizes both system efficiency and comfort. This high-tech unit offers a variety of solutions, yet is easy to install and program.

The Viridian® - VR3452 is a high-efficiency wet rotor circulator for chilled and hot water applications. The permanent magnet ECM motor saves up to 80% of electrical power over conventional pumps. Variable speed settings are easily accomplished on the user-friendly interface. The optional Communication module enables Ethernet communication, Modbus RTU communication, Analog Control input 0 - 10 V,

3 analog inputs/outputs, 1 relay output, Main, Standby, Parallel Pump Operation. Operations include the default Auto Mode, Proportional pressure, constant pressure or constant speed, plus night setback turndown. This circulator features excellent energy savings, easy handling and installation, plus ‘plug and play’ set-up.

The Viridian® - VR Series high-efficiency wet rotor commercial circulator for chilled and hot water applications. Their permanent magnet ECM motors consume up to 80% less electrical power than conventional pumps. Full variable speed control delivers optimum performance and cost savings. Plus, Taco Viridian is web-enabled. All settings and pump access can be done over an internet connection, making installation, set-up and service easy.

Do your best work.

HPAC02_22-27_Siggy.indd 24 15-03-11 9:04 AMMARCH 2015 | HPAC 45HPACMAG.COM

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2016 Print Advertising RatesRate Card #153 | Effective December 15, 2015

Double Page Spread (16.25” X 10.75”) - Call for pricingGross Canadian dollar advertising rates For American quotes please contact your sales rep

AD SIZESPECS 4 COLOUR RATES

width depth 1X 3X 6X GOLD STAR (7X)Full Page Live Trim Bleed

7”8.125”8.375”

10”10.75”

11”

6,399 6,199 6,099 5,299

2/3 Page Vertical 4.5” 10” 5,899 5,799 5,699 5,0992/3 Page Horizontal 7” 6.5” 5,899 5,799 5,699 5,0991/2 Page Island 4.5” 7.5” 5,150 5,050 4,950 4,5501/2 Page Horizontal 7” 4.875” 4,750 4,650 4,550 4,0501/2 Page Vertical 3.375” 10” 4,750 4,650 4,550 4,0501/3 Page Horizontal 7” 3.25” 3,899 3,699 3,599 3,0991/3 Page Vertical 2.125” 10” 3,899 3,699 3,599 3,0991/3 Page Square 4.5” 4.875” 3,799 3,599 3,499 2,9991/4 Page Square 3.375” 4.875” 3,099 2,999 2,899 2,599

Print Ad SubmissionFTP site uploading information for HPAC Magazine: Follow prompts to upload your files. Please make sure that YOUR company name is on your file.

Sending Files Electronically Annex Business Media Loading Dock: http://annexnorth.loadingdock.ca

The preferred file submission is print optimized PDFbut we will accept the following file formats: PDF/X; QuarkXpress (Mac/PC); Adobe Illustrator, Photoshop or Indesign CS4 (Mac/PC)

Requirements for artworkAll fonts must be supplied or embedded in the PDF fileAll images must be supplied or embedded in the PDF file and meet print specifications (CMYK, 300 dpi)All colours used must be CMYK or GrayscaleA proof of your ad must accompany your artwork (low res PDF is fine), sent to:

Cheryl Fisher, Production Manager 416.510.5194 cfisher@annexbizmedia.com

Digital Advertising Rates

This Rate Card is a summary only.

WEBSITE e-newsletter e-blast4500 unique monthly visitors16,000+ monthly pageviews

11,500 recipients 12,000 national recipients

4 times per year

Leaderboard $900/month Leaderboard $750/edition $250 cpm $600 non-print advertiser

Big Box $800/month Big Box $700/edition Regional Ratesavailable

$450 print advertiser

Video $900/month Text Ad $500/monthBanner $1500/12 months

French Products Translation Included

pccmag.ca Cyber Bulletin e-newsletter French e-blast

Big Box $400/month Leaderboard $450/month 4000 recipients

Big Box $400/month $1500