Manual S requires that equipment be selected to meet the heating and cooling Manual J load calculations with a specific manufacturer and model number indicated.

The software will calculate all the factors and provide the sensible and latent capacity required to heat and cool the home. This capacity is then used to match a heating and cooling system which will produce the same capacity within tolerance.  This important match-up is completed by utilizing the Manual S requirements.  Once the equipment is selected, the duct work can now be designed using specific factors given to us by the equipment manufacture’s fan rating tables and pressure drop charts in which we can apply to your new duct design using Manual D requirements.

Entrusting your HVAC sizing to an unlicensed, inexperienced, individual could prove a costly mistake. It takes more than just knowing how to run a HVAC sizing software to properly size equipment for the job. At JL Finley Construction, ALL of our Manual J HVAC sizing calculations are performed by JL FINLEY employees whom are trained and eager to assist. Go for peace of mind that the equipment installed won’t be under-sized or over-sized when it comes time to start up.  Trust in JL FINLEY CONSTRUCTION for the design and go the next step and ask for an estimate to do your complete installation.

Manual J Manual D