Ductwork and High Ceilings | HVAC Duct Work Systems

by | Duct Work | 2 comments

DuctWork and High CeilingsDuctwork and High Ceilings - I did not see any reference to my question and would appreciate a response as soon as possible, as due to a medical situation, have to make a decision soon. We own an OLD house with 13′ ceilings in a large part of the home and 11″ ceilings in the LV/DR and BR. We are oscillating on where to place the ducts…Floor or ceiling. It appears to be counterproductive to me to put the ductwork in the ceiling since it will have so far to go.

We are looking for the most cost-effective, not upfront cost but operating cost, solution. In addition, we are considering DF heat pumps. The house will need 2 or 3 to be zoned correctly. Please let me know about the duct placement and thank you for your help? (more…)

Air Conditioning and Heating Sizing | HVAC Technical

by | Technical Reference | 0 comments

Air Conditioning and Heating Sizing
Air Conditioning and Heating Sizing - It is not uncommon for HVAC estimators or HVAC contractors to use various rudimentary techniques, which are generally referred to as rules of thumb. Some will say on the low end you need 1 ton of cooling for every 500 square feet.

On the high end, you will need 1 ton of cooling for every 700 square feet. These rules of thumb will also generally take into account a basic heat gain calculation for the kitchen and the number of people who will occupy the structure. (more…)