Servicing the Ottawa region’s Heating & Cooling Needs for over 25 Years.


FAQ & Glossary

What can I expect in an appointment?

At Harding, we offer multiple options to find you the best home comfort solutions to satisfy your home’s unique heating, cooling and air quality needs.

Our staff will provide a top-to-bottom analysis of the systems best suited for your household.

Experience the Harding difference.

We recommend homeowners check their furnace filter every month and replace it as needed. Read more.
Yes. Harding’s heating and cooling units are designed to operate as a complete, matched system. The efficiency rating is based on the entire system. Replacing the entire system ensures all your equipment will be reliable and efficient. Read More.
Yes. However, we recommend that plants be no closer than 18 inches to the unit. This allows for plenty of room for air circulation in and out of the unit. Without room for air circulation, the unit could overheat, resulting in a premature need for service. Read More.
Preferably On. This is the most used and most efficient setting. With the “on” setting, air is constantly filtered through the unit’s air filter, which results in an even temperature throughout the house.
There are special names for the efficiency ratings of various types of equipment. Air conditioning equipment is rated by the Seasonal Energy Efficiency Rating, or SEER. The higher the SEER, the more efficient the unit. Read more
HVAC systems are complicated networks of machinery that should be serviced by a certified professional. However, if your HVAC system seems to be malfunctioning, you can try a few basic steps, which may correct your problem, prior to calling an HVAC service professional. If you do not feel comfortable performing these tasks, do not hesitate to call a Harding Heating & Air Conditioning professional:
  • Make sure your circuit breakers are in the ON position
  • Make sure your filters are clean
  • Open supply and return vents and make sure they are unobstructed
  • Check the settings on your thermostat
  • Make sure the system switch is on the appropriate COOL or HEAT setting
Using a variable-speed furnace or air handler as part of your HVAC system can reduce humidity levels. Variable speed units run longer at lower speeds, allowing air to constantly circulate against the cooling coil, removing more moisture. Variable-speed motors also use less electricity than regular motors, reducing your energy costs.
Maintenance and service play a key role in the life cycle of a Furnace and Air Conditioning system. If all recommended maintenance and service actions are taken, an air conditioner can last 10 to 15 years and a gas furnace 10 to 15 years.
Putting a new system in a home that has not had central air and heat before will require the installation of insulation, refrigerant piping, electrical service, wiring, thermostat, condensate piping, flue piping, flue terminations, slabs, filters, driers, registers, grills, drain pans, and an evaporator coil. Above all, the most important component installed with a new system is the ductwork. Ductwork is composed of two parts – supply and return. A supply duct is attached to the outflow of the new system, delivering air to each zone in a home. The amount of air reaching each zone is determined by the size of the supply ductwork. The return duct attaches to the inlet of the new system and draws air out of the spaces to be heated or cooled. The filter is attached to the return duct and should be placed as close to the furnace or air handler as possible. Ductwork can be either fiberglass or metal and must be properly sized in order to evenly distribute the proper amount of air to each room.
With so many furnace and air conditioning systems to choose from, your Harding Home Comfort Advisor will draw on a vast degree of furnace and air conditioning knowledge and experience to help you decide on the system that best fits your specific needs. The size, location, and age of your home, as well as the number of rooms, humidity levels, climate, local and regional utility costs, and utility incentive/rebate programs are just some of the factors that will affect the functionality, and therefore, the selection of your system. Consumers seeking to replace an existing heating and cooling system often choose a new unit with equal or higher efficiency ratings compared to their previous system. Replacing a unit that is 10 to 15 years old may reduce natural gas or electricity costs by 30-50%. A Harding Heating & Cooling Home Comfort Advisor can perform the proper calculations to determine the appropriate heating or cooling unit for your home and lifestyle.
At Harding Heating & Air Conditioning we realize that purchasing a furnace or air conditioning system is no small matter. However, if your existing system is old, in need of repair, or is simply inefficient, purchasing a new unit – one which can be as much as 60% more efficient than a system purchased just 10 years ago – can offer long-term benefits and save you money. Investing in a new heating or cooling system today will save you money for years to come.
There are many benefits to having central air conditioning. For one, you can enjoy indoor comfort during warm weather as central air conditioning helps keep your home cool and reduces humidity levels. Secondly, you will experience cleaner air. As your central air conditioning system draws air out of various rooms in your home through return air ducts, the air is pulled through an air filter, which removes airborne particles, such as dust and lint. The filtered air is then routed to the air supply ductwork that carries it back to the rooms in your home.
A typical central air conditioning system is a split system, with an outdoor air conditioning or “compressor-bearing” unit and an indoor coil, which is usually installed on top of the furnace. Using electricity as its power source, the compressor pumps refrigerant through the system to gather heat and moisture from indoors and removes it from the home. Heat and moisture are removed when warm air from inside the home is blown over the cooled indoor coil. The heat in the air transfers to the coil, thereby “cooling” the air. The heat that has transferred to the coil is then “pumped” to the exterior of the home, while the cooled air is pumped back inside, helping to maintain a comfortable indoor temperature. Central air conditioning can also be provided through a package unit or a heat pump.
A home may be divided into several different areas (zones) to better control the temperatures throughout the house. The process of dividing your home into different areas is called zoning.
The ton ratings you see here have nothing to do with the weight of the unit. In fact, a ton is simply 12,000 BTUs (see BTU definition on this page). A typical home cooling/heating system uses heat pumps or air conditioners with a capacity of between 1.5 and 5 tons.
A home comfort system that uses an indoor and an outdoor component to deliver comfortable air to a living environment.
Copper lines used to transfer the refrigerant between the outdoor unit and the indoor unit.
The liquid used to absorb and transfer heat from one part of the home comfort system to another.
Split-system home comfort systems use two main components to deliver air for a comfortable living environment. The indoor coil is responsible for transferring heat from indoors to the outdoors (or the reverse in the case of a heat pump in heating mode). Most modern systems are designed to achieve maximum efficiency when the indoor unit (coils and blower) is properly matched with the outdoor unit (air conditioner or heat pump).
Heating, Ventilating and Air Conditioning. Used to refer to the industry at large.
An integral part of the indoor unit of a heat pump or air conditioning system. When warm air passes over a coil filled with liquid refrigerant, the refrigerant itself evaporates and absorbs some of the heat. This gas refrigerant is then pumped to the outdoor coil, where it releases heat into the surrounding air and returns to its liquid state.
A general term used to describe how effectively a heat pump, air conditioner, or furnace converts incoming energy to outgoing energy. The higher the number, the more efficient the unit and the lower the operating cost.
A central heating and air conditioning system uses many components to heat or cool air. This warm or cool air is then transferred to different registers throughout the house via flexible, large-diameter pipes or ducts. The system of ducts throughout your house is often referred to as ductwork or ducting.
A “valve” used in ductwork that opens or closes to control airflow. Used in zoning to control the amount of warm or cool air entering certain areas of your home.
The coil is responsible for dissipating heat to the surrounding outside air. Also called the condenser coil, or outdoor coil, its role is reversed when a heat pump is used in heating mode.
The compressor plays an integral role in cooling your home. It is the device responsible for pumping refrigerant through the refrigerant lines and the coil, making the transfer of heat from inside your house to the outdoors possible. Harding uses high-quality compressors throughout its residential air conditioning and heat pump line so you can enjoy quiet, efficient, and trouble-free operation for many years to come.
A unit to express movement of volume, including air, in Cubic Feet per Minute. A 400 CFM air handler moves 400 cubic feet in one minute.
Usually measured in BTUs or tons, capacity refers to an air conditioning or heating unit’s ability to cool or heat a space. For instance, a 20-ton air conditioning unit has twice the capacity of a 10-ton unit.
Short for British Thermal Unit. The amount of heat required to raise or lower the temperature of one pound of water by one degree Fahrenheit.
Call Now Button