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Mr. Heat Mechanical Inc. Heating Cooling Electrical Hydronic Contractor Official Website

100 Year of Cooling

Air conditioners have become an indispensable comfort in the modern world. Central and zoned air conditioning system came a very long way to become as efficient as we see them today. With increasing temperatures and expanding population, modern man has adapted to vive the summers using this very useful little invention. Following infographic is a simple explaniation of air conditioning history.

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The Next Step In The EC Motor Revolution


The desire to control motors to provide a greater efficiency for the fans,pumps, and compressors has led the industry to explore development and use of variable speed motors. Approximately 25% of world electrical energy is consumed by by electric motors in industrial applications. In heating and air conditioning industry most motors do not need to operate at full speed and they could satisfy the heating and cooling load by operating at a slower speed. For example, if a home or business needs only 50% of the its capacity of the gas furnace to satisfy the space temperature, it would be advantageous to reduce the capacity of the unit rather than stop and restart the unit. When the power consumption can be reduced in this manner, the unit becomes more efficient. Lennox Signature Collection & Elite Series systems are equipped with EC motors.

New government energy-efficiency standards, combined with advances in materials and electronics, are compelling many end users and OEMs in the heating, ventilation, air-conditioning and refrigeration industry to design—or redesign—their systems to be more energy efficient. Because blowers are one of the biggest energy consumers in an HVAC or refrigeration system, the motors that power them are “low-hanging fruit” and have been a primary target for these efficiency improvements. Over the past decade, for example, as many as 50% of all new residential furnace blowers have been upgraded with efficient electronically commutated (EC) motors. EC motors are electric motors that have brushless permanent magnets and have been integrated with a tuned variable-frequency motor drive. Because they use electronics to control the voltage and current applied to the motor, EC motors do not waste power inducing the rotor field like induction or other motor types.Until recently, however, EC motor upgrades have been performed primarily on smaller, residential applications that require motors of one horsepower or less. Advances in materials and electronics, however, are now changing all that. Switching to EC motors is today one of the most cost-effective “bolt-on” energy-efficiency upgrades that can be made to a commercial or light industrial HVAC or refrigeration system.
The transition EC motors are proving to be an especially good upgrade option for HVAC and refrigeration systems that currently depend on induction motors to power the fans, blowers and pumps that drive air and water through their systems. OEMs and end users, alike, see switching to EC motors as a way to boost their systems’ overall efficiency with one relatively easy-to-make change. EC motors are now available in an increasing number of sizes and power outputs. Some of today’s most advanced integrated EC motor and drive systems can operate up to 10 hp and have achieved or exceeded the IEC defined IE4 Super Premium efficiency rating. That makes them good candidates for those who want to capitalize on energy-rebate opportunities, as well. 

When integrated into a system, these motors not only save energy, they also can be used to create systems that are smaller, lighter and quieter to operate.

Energy savings—EC motors that meet IE4 efficiency levels have been shown to offer up to 91% system efficiency for the motor, drive and fan. In some cases, that exceeds the efficiency required by NEMA for a premium-efficient motor alone. At that level of efficiency, a single 5-hp motor can reap energy savings of between $180 and $250 a year, compared to an induction motor and VFD. Improved reliability—An integrated EC drive/motor system that has been precisely tuned can reduce common VFD-related issues, such as electromagnetic interference and corona discharge, which can produce electronic noise and disturbance. In addition, because EC motors are not prone to overheating, they do not require additional measures to offset heat generation.

What is next

The IEC IE4 super premium efficiency requirements set a high bar for the future. To reach that bar, motor manufacturers can be expected to continue extending the power outputs and other capabilities of integrated EC motors and drives, thereby expanding the range of commercial and industrial applications they can serve. Larger hydronic pumping systems, and rooftop and other commercial blower systems will be among the next to benefit. The good news is as more IE4 efficiency motors become available and all the new efficiency regulations are in place, end users will be the ultimate winners. The new, more efficient systems they will generate will consume less energy, saving money and improving overall industry performance in the long run.


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Energy Saving Tips

Cooling Your Home We can help

Try these no-cost, low-cost tips to cool off and save energy. We spend the majority of our energy dollars controlling the temperature of our home. In the summer, that means keeping it cool. Try these passive cooling approaches first. Even if you’re still using air conditioning, you’ll use less and that lowers your electricity use.

Draw the curtains on heat

In the morning, open windows to let cool air in. Then close them, and draw your blinds or drapes during the day to keep the hot sun out. Your home will retain much of the cool morning air.

Let fans move the air

Ceiling fans help cool down your home. They don’t use much electricity and can help reduce the need for air conditioning. Make sure the fan blows air downwards in summer.

Cool down your menus too

In the summer, use the BBQ and include more cold foods and salads in your menu. Try not to use major heat-producing appliances in the middle of the day.

The real problem may be humidity

Humid homes feel hotter. Use exhaust fans in kitchens and bathrooms to expel air outdoors – and avoid air-drying clothes inside.

Shopping Tips

Central Air Conditioner

Since central air conditioner is a major purchase, get a number of quotes from reputable dealers. Get up to $400 in "Save On energy" rebates by buying eligible unit from a participating retailer.

Room Air Conditioner

  • Read the EnerGuide label for the EER (Energy Efficiency Ratio) rating. The higher the number, the more efficient the unit.
  • Look for the ENERGY STAR symbol the product label. This indicates that the unit meets the highest energy-efficiency levels.

For more tips visit

Five ways a variable speed or constant torque furnace can help increase comfort and savings this summer

Greater energy savings

Variable speed and constant torque furnaces use up to two-thirds less electricity in heating or cooling mode and are up to 6x more efficient than a PSC motor in “fan” mode. Additionally, these furnaces boost cooling efficiency up to 1 or more SEER (Seasonal Energy Efficiency Rating) points for additional summer savings.

The Dave Lennox Signature® SLP98V is the most efficient furnace you can buy* and uses up to 2/3 less electricity than a PSC motor to help keep cooling bills down in the summer.

Quieter operating sounds

The furnace is the piece of the HVAC system a homeowner will hear most. Constant torque and variable speed furnaces ramp up slowly to eliminate loud startup noises and continue to operate on lower speeds.

The Dave Lennox Signature® SLP98V is the quietest furnace you can buy* operating at sound levels as quiet as a library.**

More even comfort

Furnaces with constant fan mode improve comfort by removing more moisture from the air to make the home feel cooler. Temperatures can be set higher while still feeling comfortable, further helping to reduce utility bills in the summer.

Furnaces such as the Elite® Series EL296V and EL296E can run at lower speeds for longer periods of time to reduce the muggy or sticky feeling in the air.

More balanced temperatures

Variable speed furnaces reduce air stratification and can maintain temperatures within 0.5 degrees of the setting. Additionally, they offer excellent zoning capabilities for customized, whole home comfort.

The SLP98V, and EL296V are equipped with a variable speed motor and distribute conditioned air more evenly throughout the home.

Healthier air

Furnaces with constant “FAN” mode circulate air slowly and for longer periods of time to capture more contaminants through the filter and improve the overall quality of air.

Constant torque furnaces such as the EL296E and EL195E can remove more contaminants and help reduce the occurrence of respiratory ailments which often occur in the spring and summer.

2016 Lennox Competition Chart

How does Lennox stack up against the competition?

There is no doubt about quality and reliability of Lennox Heating,Cooling and Indoor Air Quality products. For over 120 years Lennox Industries has been in forefront of innovation. Following chart is the latest comparison chart between Lennox & other major heating and cooling products.  

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