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New HVAC System Buying Guide

Before purchasing a new HVAC system it’s important to consider the efficiency, type, size, ratings, price, and fit of each system to your needs.

We know that buying a new HVAC system can be a huge investment, so we’d like to make the process as easy as possible by providing you with all the info you need before you make the decision. Whether you’re in need of a new furnace for the winter season, or a new AC for those hot summer days, our buying guide is here to help you.

Here are the essential things to consider before buying a new HVAC system:

New HVAC SystemCorrectly sizing your new HVAC system

It’s crucial that you choose an HVAC system that’s the right size for your home. The best way to find out what size of air conditioner or furnace you need is to call a licensed HVAC professional.

An oversized or undersized furnace or AC can lead to a number of problems, such as:

  • Less efficient operation due to having too much heating and cooling capacity. The furnace or AC will be consuming more energy to heat/cool air for less space. The system will also constantly stop and start, causing the equipment to wear down at an accelerated rate.
  • You’ll be sacrificing your comfort because your HVAC system provides inadequate heating or cooling for the size of your home.

The equipment’s SEER or AFUE rating (or other ratings)

Buying an HVAC system with better ratings will allow you to save money every month on your utility bill while also doing your part in helping the environment and lowering your carbon footprint. SEER, AFUE, HSPF, and EER are different rating systems which indicate how energy efficient an HVAC system is. As a general rule of thumb, the higher the rating, the more efficient the system.

Furnaces in the 90 to 98 percent AFUE range are considered high efficiency models and are Energy Star certified.  Having an Energy Star certified furnace in your home allows you to take advantage of tax and rebate benefits which were created to give incentive to consumers to help the environment. All furnace manufacturers have a range of high efficiency furnaces in their product line which gives you plenty to choose from.

A SEER rating indicates the efficiency of an air conditioner. SEER stands for Seasonal Energy Efficiency Rating. When choosing a new central air conditioning, look for one with a SEER rating of 15 or above. The higher the SEER rating, the more money you save on wasted energy.

Take long term cost into consideration

The sticker price of a furnace or AC is not necessarily the true cost of the unit, which is why we often advise homeowners to not simply choose the cheapest option. The true cost of an HVAC system can really only be seen once the unit has stopped working.

What we’re trying to say is that a less expensive unit can often end up being very costly by the end of its life. Cheaper units often require more repairs, are less efficient, and reach the end of their life sooner.

This is why we emphasize on choosing a high efficiency HVAC unit. New high efficiency units are built to last and will save you money in the long term.

Upgrading to a smart thermostat

A smart thermostat is a great companion to your home’s brand new heating and cooling system. A programmable smart thermostat will allow you to remotely set the temperature and times your AC and furnace will run at. These devices can be controlled through your smartphone, meaning that you have control over your HVAC system even when you’re not at home.

A programmable thermostat will allow your air conditioner and furnace to last longer and operate more efficiently.

Upfront purchase isn’t the only option

It’s not within every homeowners budget to spend thousands upfront on a new HVAC system, but luckily there are other payment options to consider.

Rent to Own Program – the rent to own program includes free installation with no upfront equipment or installation costs, only one low monthly payment, and 24/7 furnace and AC maintenance and protection with free equipment replacement in the event that it cannot be replaced.

Flexible Financing – Finance your HVAC system for as little as $1 a day. Flexible financing options can be tailored to fit your financial needs.

Upfront Purchase -Purchase your furnace or air conditioner upfront and receive a 10 year manufacturer warranty. Select models will also include a lifetime warranty on the heat exchanger and compressor.


If you have any further questions regarding upgrading to a new HVAC system, don’t hesitate to contact us at any time. Our highly trained and experienced technicians are more than prepared to assist you with any of your furnace or air conditioner problems. A new furnace or AC installation is simpler and less expensive than you may think.. DeMark Home Ontario provides renting, purchasing and financing options that are tailored to fit the needs and budgets of any homeowner. We provide efficient and quick HVAC replacement done by our team of trained and certified professionals. Give us a call at 1 (855) 998-2998 or fill out our online request form and we will be happy to assist you with your request.

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Upgrading to a high-efficiency heating and cooling system offers more than energy savings.

Take advantage of these rebates today!


This item comes with absolutely free standard installation. We’ll ensure that the product is completely installed to code and fully functioning prior to leaving.


Great news! Receive a brand new digital thermostat absolutely free when renting this HVAC product from DeMark Home Ontario.


Great news! When renting a furnace or air conditioner, you’ll get your first 2 months absolutely rent free.


Great news! When renting a furnace and air conditioner together, you’ll get your first 3 months absolutely rent free.


This product carries a manufacturer warranty and we’re happy to explain it in full to you. Feel free to get in touch with us for more information or see the Warranty Information tab for more information


If your order is placed and confirmed by 11am, we can have your HVAC product installed within the same day.

Certain conditions apply, not available on all products.


This water heater is subject to reduced rental rates based on the DHO discount program. Save money on your bill every single month!

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Save money on this item when buying it along with a qualifying high-efficiency furnace or air conditioner.

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Great news! When renting a qualifying water heater, you’ll get your first 2 months absolutely rent free.


Promotional code can be found on the eFlyer, Brochure or promotional email that you received from us.

*If you are an existing customer please refer to the mail or email that was sent to you after the installation of your equipment as it contains your promotional code. If you are having troubles locating it please call us and one of our Customer Service Representatives will be happy to assist you.

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Notice for Power Vent Water Heater Customers

Effective August 2007, gas code requires technicians working on venting to replace black ABS vent pipe with white UL-certified vent pipe.

We will upgrade your venting pipes at no additional cost.

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