When I started living on our own I barely knew a thing about residential Heating plus A/C but now as a outdated homeowner, I have l acquired a lot about them. Most of the expertise I have acquired has been from many calls to homeowner solutions businesses plus an Heating plus A/C professional when they come for service or repairs. It took myself and others a while to be confident enough to change a heating system filter on our own, I always ordered it plus had a serviceman update it for me. It was not so long ago when I found out that even an HVAC duct requires cleaning every couple of years. I always thought that quality Heating plus A/C had an indoor air cleaning plan plus an media air cleaner, while this may be tplot in some it is not always the case. A proper air filter may not be able to achieve all that plus one may be required to buy additional device to achieve high indoor air pollen levels. I remember when the cooling specialist suggested that I update our outdated temperature control to a programmable one. I was adamant about not getting one from our local Heating plus A/C contractor because I did not get the concept of replacing something that was still laboring but when he told myself and others it would help myself and others chop back on the electricity bill I was sold. It was instantly obvious on our next energy bill, the outdated regulator was making our heating plus cooling plan run more because other than being outdated it was also faulty. I have also l acquired that a/c service plus service go a long way in improving air quality in the condo plus also prevent fancy repairs plus part updatement.