When our spouse & I built our modern home, the two of us hired a general supplier to help us with the planning, layout & framework. Both of us also hired licensed specialists to handle the electric, plumbing, heating & cooling. Both of us spent a wonderful deal of time & consideration on small details, such as the location of power outlets, style of water heater, & type of heating & cooling system. My spouse & I researched shower heads, toilets, oil furnaces, heat pumps, boilers & air conditionings. Fortunately, the electrician, plumber & Heating & A/C supplier were genuinely expertiseable & helpful. Their recommendations ensured that the two of us made smart choices & invested in top quality equipment. The Heating & A/C supplier impressed upon us the importance of the design & integrity of the duct system. He showed us examples of duct systems that were incorrectly installed, with all sorts of sharp bends & lots of seams. In order for the oil furnace & air conditioning to operate at peak efficiency, the duct idea needs to be streamlined. Any flaw in design can lead to the accumulation of debris within the system, leaks, & restricted airflow, a poorly designed & installed duct idea ends up costing a wonderful deal of money in higher utility bills. Plus, the added wear & tear on the oil furnace & air conditioning results in more frequent repairs & premature failure. Both of us also hoped to avoid bulky ducts taking up pricey section & detracting from the appearance of the home. The Heating & A/C supplier worked through a custom sheet metal shop to have ducts fabricated to perfectly meet our requirements. Now that our apartment is complete, the two of us are totally excited with the efficiency & operation of the heating & cooling system.