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Reduce Office Energy Costs by Improving Energy Efficiency

January 05, 2018

In any office, large or small, there should always be a focus on reducing overhead costs. And one of the biggest costs for any business is energy – mostly winter heating and summer cooling. Any effort to reduce office energy costs will be related to improving some aspect of energy efficiency.

On a small scale, there are numerous improvements that can be made - LED lights and fixtures; motion sensors and dimmer switches; even programmable thermostats. But for dramatic change, energy efficiency will most likely involve comprehensive upgrades to air sealing and insulation.

Energy efficiency upgrades will reduce office energy costs

In an effort to reduce office energy costs, business owners need to make the type of upgrades and retrofits that will deliver a meaningful return-on-investment. Turning up the heat in winter or turning down the thermostat in summer are both money wasters. And an HVAC system that’s working “overtime” is simply contributing to waste and doing little to reduce office energy costs.

Upgrades that will measurably reduce office energy costs will usually focus on three elements – air sealing, thermal insulation, and mechanical ventilation. Working together as a system, the three elements contribute to optimum energy efficiency while reducing energy consumption. The results are evident – indoor comfort from season to season and energy savings for the long term.

Insulation Upgrading

In many commercial applications, contractors are recommending spray foam insulation as the ideal retrofit. It’s an application that seals and insulates at one time, enveloping every opening, crack, and crevice for an airtight space. The finished installation is far superior to any insulation product on the market. A spray foam retrofit does it all - sealing the space; providing very high R-Values; even adding structural strength to the installation space.

Window Film Application

Window films save on energy can reduce energy costs by retaining indoor heat in the winter and preventing outdoor heat from penetrating in the summer. Temperature fluctuations from office to office are diminished, and occupant comfort is improved as a result. In terms of investment, window film applications will “pay off” quickly, simply from the energy savings during winter and summer. As well, the HVAC system will be better balanced.

Air Sealing Retrofits

Even with quality insulation, the job isn’t complete without addressing air leakage in the building envelope. In short, air sealing is key to ensuring energy efficiency. Air movement is controlled, and with proper ventilation, the heating and air conditioning system operates more efficiently. Air sealing and ventilation work together to improve energy efficiency, while reducing energy consumption season to season. The result: significant savings.

Improving energy efficiency with Great Northern Insulation

With Great Northern Insulation, a combination of air sealing, insulation, and ventilation ensures optimized energy efficiency. With a highly skilled team of installers, GNI will recommend the best product and installation for the job. It’s all done according to the building code, and every install is based on manufacturer specifications. To find out more, visit the GNI website at www.gni.ca .

Western Ontario

935 Keyes Drive
Woodstock, Ontario
Canada N4V 1C3

Phone: 1-800-265-1914

Fax: (519) 539-7946
TOLL FREE: 1-800-265-1914

Muskoka, Haliburton, Northern Ontario

1027 Elwell Park Road
Gravenhurst, Ontario
Canada P1P 1R1

TOLL FREE: 1-800-265-1914

Central Ontario

29 Ferndale Industrial Drive
Barrie, Ontario
Canada L4N 9V5

TOLL FREE: 1-800-265-1914

Greater Toronto Area

2 Guided Court
Etobicoke, ON
M9V 4K6

TOLL FREE: 1-800-265-1914

GTA East

103 North Port Road
Port Perry, Ontario
Canada L9L 1B2

TOLL FREE: 1-800-265-1914

South Central Ontario

450 Industrial Dr,
Toronto (Milton), Ontario
Canada L9T 5A6

TOLL FREE: 1-800-265-1914

Eastern Ontario

1035 Moodie Dr #1,
Nepean, ON
K2R 1H4

TOLL FREE: 1-800-265-1914

Niagara Region

25 Lincoln Ave
St. Catharines, ON
L2P 2C7

TOLL FREE: 1-800-265-1914


Great Northern Insulation - Better Business Bureau Profile.

Homestars Best of 2021 Award

Best of 2021

HomeStars has ranked Great Northern Insulation as a company that goes above and beyond in every aspect of business for the year of 2021.

Homestars Best of 2022 Award

Best of 2022

HomeStars has ranked Great Northern Insulation as a company that goes above and beyond in every aspect of business for the year of 2022.


GNI is the Authorized & Trusted Insulation and Air Sealing Installer for Lowe’s

Trusted for Over 40 Years

Over 40 Years in Business

At GNI, we service your project with the most experienced staff in the industry. Ongoing professional development is an obsession at GNI and we will not compromise at any level to bring to our customers the very best Installers, Sales Representatives, Customer Care Personnel, Field Superintendents, Estimating and Technical Support to your project.

100% Canadian

100% Canadian

Great Northern Insulation is recognized as Canada's largest full-service insulation contractor. GNI is 100% Canadian owned, proudly serving Ontario customers since 1980.

Foam Masters

Do it right the first time
- with foam mastersTM

January, 2021 regulatory phaseout of hydrofluorocarbons (HFCs) with the introduction of WALLTITE CM01. Using hydrofluorolefins (HFOs) with lower global warming potential (GWP) compared to HFCs, WALLTITE CM01 is the next generation of spray foam insulation.



Heatlok® Soya HFOTM leverages Honeywell’s latest Solstice® Liquid Blowing Agent technology. This new hydrofluoroolefin (HFO) blowing agent is the most environmentally conscious blowing agent produced to date, with a zero ozone depletion potential (ODP) and a global warming potential (GWP) of 1, which is more than two orders of magnitude (99.9%) lower than HFCs used in this industry.


3MTM products.
Quality + Performance = Savings

3MTM energy-saving products are designed to keep warm air in, and cold air out, while keeping energy bills down. Products optimize energy efficiency in buildings and homes; improve indoor environment for occupants; and effect the reduction of seasonal energy costs. 3M products are authorized for LEED credits (Leadership in Energy/Environmental Design).

Holmes and Holmes

Holmes and Holmes


Mike Holmes and his son Mike Jr. (MJ) convert MJ’s bachelor bungalow into a two-storey home for MJ and his girlfriend Lisa. Choosing the newest materials and build techniques, the father and son team follow Mike’s famous motto – “Make it right.” The show can be watched on HGTV and DIY Network.


Enbridge Incentives

The Home Efficiency Rebate Plus program offers up to $10,000 in home reno rebates – and Great Northern Insulation can pave the way.


Great Northern Insulation proudly abides by a renovation-specific Code of Conduct set by RenoMark™.


We are Verified & Bonded by eRenovate. When you choose to proceed with our services through their platform, you receive the gaurantees set forth through their program.

As Seen on Love It or List It

The GNI crew have been featured installing insulation on Love It or List It - have you seen our logo in an episode?

Climatizer Cellulose


CLIMATIZER PLUS cellulose insulation is manufactured from a minimum of 85% locally-sourced post-consumer recycled newsprint. Non-toxic additives are applied to the uniquely fiberized paper generating a building material with superior thermal and acoustic properties, as well as exceptional resistance to fire, moisture, mould and pests.

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