A furnace is an appliance or device that is used to provide homes as well offices with the warmth and thermal comfort needed every time outdoor temperatures begin dropping during the fall or winter seasons.
Your furnaces would be an essential companion that will bring you joy and comfort amidst that cold weather. That is why it is very important to find the one that will keep you comfortable while not even costing you an arm or a leg to use.

When it comes to furnaces, there is no such thing as lack of options. Many industrial and residential big brands have varying and competitive products which make it hard for clients and customers to choose.
As such,the following topics would help you be equipped with the knowledge, terms and ideas that would essential to always have the right decisions for your home and business.

How the HVAC System Works

HVAC which stands for Heating, Ventilating or Ventilation and Air Conditioning is the technology of indoor and also for vehicular scope has the goal to provide thermal comfort and indoor air quality.
It makes use of different principles ranging from mechanical engineering, thermodynamics, heat transfer and fluid mechanics and has been an important and integral part of residential and commercial establishments where safe and healthy building or structure conditions are regulated in accordance to temperature and humidity using fresh and regulated air.
Different HVAC units do their role in integrating and utilizing the three central functions of the system which includes heating, ventilating and air conditioning. It also includes certain means of air delivery and removal from specific spaces and reduction of air infiltration and maintains pressure relationships between spaces.
Know that we already know that controlling the temperature of air as well as the humidity in homes and buildings plus maintaining high air quality are the basic functions of the HVAC system but how HVAC works?

Below are several types of systems we would look at to determine how exactly the HVAC system works:

Split Air conditioning system

Let’s identify as to why it is called a Split air conditioning system. Since the unit includes components located inside and outside of the home, it is literally split into two components. Some terms associate it with Central air conditioning.
An outdoor unit comprised of the condenser and compressor, and an indoor unit with a fan and an evaporator coil, typically, a split air conditioning functions to remove the warm air from inside a home or structure and cycling it back as cooler or lower temperature air through a system of supply and return ducts or passageways.
The compressor pumps powered by electricity pumps refrigerant through the system to collect heat and moisture from the inside space. The heat and moisture is then carried away from the inside and is blown over the cooled indoor coil which cools the air. The heat collected in the coil is then pumped and distributed outside of the home while the cooler air cycles back inside.
This is particular in warmer climates and is very effective in doing its role. Some units feature a lower indoor noise level compared to free standing air conditioning units. It also ensures quality air as the air returns drawn out of rooms and filtered through an air filtrating mechanism. This removes airborne particles and the output would be cleaner and filtered air distributed to homes.

Mini-Split/Ductless system

Unlike traditional split HVAC systems that a HVAC technician installs, the ductless system does not rely and utilize ducts to carry and route air throughout the home. It is designed to heat or cool a single room. Space, zone or an addition to your house that may lack or cannot accommodate any ductwork.
A mini-split/ductless system is powered by electricity and comprised of a relatively small outdoor condensing unit and a compact indoor evaporator unit, which hangs on the wall to control and direct airflow. The mini in this type of HVAC system’s name is a direct reference to the indoor unit’s diminutive size and inconspicuous appearance. The indoor and outdoor components are connected via copper refrigerant tubing and electrical wiring, requiring an opening just three inches or less in diameter.
As per HVAC trainings and studies, these types of system are recognized as energy efficient and extremely popular in the United States.


Misconceptions on furnace include the thinking that these are old technologies from the early 20th century which features a large gravity fed structure. However, in modern times, this presents a large contribution in indoor comfort all year round. Linking it with the mini split system as its counterpart, it does a great job in keeping the home or office warm during winter. The furnace fan or blower is also used to assist air conditioning system in circulating cooled air during warmer seasons.
From a gas furnace, heat is produced as an outcome of the combustion of natural gas in its burner. The heat is then distributed as the air passes from a heat exchanger blown and passes through certain ducts of the home.

Heat Pump or Air handler

A heat transporter which extracts warm air from your home during summer and then in turn reversing the operation to bring warm air during the winter.
HVAC explained through this system involves A heat pump is installed outside the home, similar to a central air conditioning unit the unit’s compressor circulating the refrigerant between it and the indoor air handler in turn absorbing or releasing heat en route, depending on the season. Unlike the furnace, it does not burn fuel to produce heat rather; it just uses electricity to move heat into or out of your home.


This technology ranges from the very basic and functional to the extremely sophisticated and feature rich ones.
In general terms, the thermostat controls the operation of the entire HVAC system and provides precise temperature regulation which has been an integral concept in HVAC training for contractors and service providers.
Newer digital, programmable thermostats such as ComfortNet™ Controlling Unit, feature both comfort- and efficiency-enhancing functionality. Programmable thermostats may be set to optimally regulate the temperature in any given spaces based on your preferred schedules and routine.

HVAC systems installed in homes and offices create thermal comfort and provide the needed air quality for healthier living, greater productivity and happy living. Of course, all units and technologies in place require a certain deal of maintenance and check every so often to ensure continuity of doing its role and to ensure having a longer life span.
It is a good idea to immediately call a HVAC company or service provider understand what the HVAC maintenance meaning is and to do the work mainly to inspect and do maintenance on the system ideally every fall and spring. They will make sure to check all wirings and mechanisms of the unit, which will be a bit complicated and challenging for home and business owners.
Regular HVAC preventive maintenance is the best and most effective way to ensure trouble free operation and sustaining optimum HVAC unit performance. It can help avoid the system from experiencing any system failure especially during the seasons when you needed these the most. It can definitely save considerable amount of money instead of waiting for that unfortunate event to transpire.
One has to do his or her respective role in prolonging the life and increasing efficiency of the system through HVAC maintenance.
That can be achieve by simply following the HVAC maintenance tips below:

Purchasing a filter if you have not secured one

The new high efficiency pleated filter available in the market now contains an electro static charge that works like that of a magnet attracting dust, dirt and the tiniest particles even those bacteria carrying particles. Check any local hardware stores or online for more details on this.

It is best to replace filters every 90 days

Though it is also best to check this on a monthly basis, if the original filter already looks dark and clogged, be proactive in replacing this already. Having pets inside homes may also increase the chances of replacing the filters at least every month.

Ensure that there is at least two feet of clearance around the outdoor air conditioning units and heat pumps to create better output and optimum performance.
Remove and take away any debris which includes dried and fallen leaves, pollen, twigs and branches weekly especially during spring, summer and fall from the top and sides of outdoor air conditioning units as well as heat pumps. When using the lawn mower, prevent grass cuttings and clippings from getting into the unit which would create blockages and clogs which will in turn affect its efficiency.
On a monthly basis, regularly inspect insulation and refrigerant lines leading into the houses and ducts. If there is a considerable change in terms of the circulated cold air, immediately turn off the unit and inspect the tubes and channels. Replace these if missing or already damaged.
On a yearly basis, pour a cup of bleached mixed with water into the air conditioning units and drain to help ooze out build up of mold and algae which can in turn clog the system.

HVAC Maintenance Checklist for Outdoor units

Inspect and do a routine maintenance on the base pan for restricted drain openings and remove clogs and debris
Check the fan motors and fan blades for any wear and tear damages. Ensure that you lubricate older models as needed
Inspect the control box, linked with the controls or accessories, wiring and connections. The controls include the following:

Contactors and relays
Circuit boards
Heat pumps

HVAC Maintenance Checklist for indoor unit inspections

On older units and models, lubricate the motor and check if the fan belt is already up fro replacement
Check the combustion blower housing for lint, clogs or debris and clean as necessary
Make sure to inspect and check for any gas leaks in gas furnaces which would definitely smell big trouble if taken for granted.
Inspect flue system—check for proper attachment to the furnace, any dislocated sections, and for signs of corrosion. Replace if necessary.
Inspect control box, associated controls, wiring and connections
Monitor air conditioning and heat pump systems for correct refrigerant charge
Measure outdoor dry bulb temperature
Measure indoor dry and wet bulb temperature
Measure high and low side system pressures
Monitor gas furnace for correct line and manifold gas pressure—make adjustments as needed
Measure temperature rise and adjust airflow as needed
Check vent system for proper operation
Monitor system for correct line and load volts/amps


How to Set Up an HVAC System

HVAC systems are crucial to keeping us comfortable. They circulate air and provide temperature control. What makes a great system, though? As HVAC experts, we know that it’s all in the details. Here, we lay everything out, from planning the system to putting it together to checking its ultimate performance.
Requirements for an HVAC System 
If you’re looking for quality, you’ll want to be sure of the following things.

Check each room for heating and cooling loads. The size of a room is a big consideration when determining proper air flow.
Get a duct that will bring air into the room. You’ll also need a return system that will ensure proper circulation.
You’ll want to be able to satisfy those computed loads from step one. For that, you’ll need a handler that monitors the air pressure so that it stays within the requirements that it was designed for.
You need to make the return and supply systems work in harmony. Balance is key to keeping pressure neutral in each room and throughout the home.
Make sure you’re not losing (or gaining) any heat around your handler and register.
A funky odor can ruin your hard work. Check that no car exhaust or stale attic air is getting into the air conditioning. A good seal on your ducts can help with this.
Pressure gauges will help you know if your refrigerant is charged. You’ll also want to double check your burner.

Putting it Together: Your HVAC System
Grab your ACCA manuals and handbooks (or whatever guides you prefer; we’ll reference ACCA literature here) – you’ll need them for putting together and maintaining your air-conditioning system.

Determine the loads and airflow in each room that you are servicing (refer to Manual J).
Handbook D will be your friend when it comes to sizing up your potential duct system.
You’ll want to consult Handbook S to get your practical load just right.
You may run into construction jams when putting together your HVAC. By laying your duct system out, you can properly anticipate potential issues given the various limitations of the space.
Manufacturer’s specifications will come in handy when installing everything. As you’re going about it, make sure there’s nowhere that might leak air.
Before you really turn up the heat, see to it that your furnace burner and firebox are operating correctly.
Refrigerant charge comes down to properly tuning your superheat and subcooling. Measure them with care.
To keep your HVAC system humming, do one last look around for leaks, as well as spacing and air flow return. Finish up with a static pressure check.