Both residential and commercial HVAC units serve the purpose of cooling, ventilating, and heating your space. However, they vary drastically in terms of parts and mechanisms as your home needs and comfort are different from those at any non-residential building.
Pick up an air filter at the hardware store and you may notice that it has a "MERV" rating on it. You may be wondering "What is MERV?" It's a rating system developed by ASHRAE to provide consumers with a way to measure air filter efficiency.
When temperatures drop, you expect your furnace to keep you warm and comfortable, even if it's frigid outside. Having an HVAC professional inspect your furnace before temperatures drop can prevent unexpected and unpleasant surprises.