Manual S Equipment Selection – Selecting Home Systems

While Manual J lets you know how to maximize your efficiency when designing heating and cooling systems for a client, Manual S is really a vital component and companion to Manual J. This manual is a must-have for all aspiring contractors and builders. This manual will give you everything you need to know about how to choose and estimate the equipment you will need for the residential heating and cooling systems you are designing on behalf of your client. Manual S equipment selection is the choice method for design today.

You will want to stand out from the competition and grow your business as a builder or contractor, so to do that you will need to know everything your competitor knows and more. This means you will need to be familiar with Manual S equipment selection protocol. Here is where you will learn important information about procedural steps for choosing and estimating the size of equipment for home systems including cooling equipment, and how to choose certain kinds of heat pumps of furnaces. The data that is explored in Manual S focuses specifically on performance data. This is useful because you can see how different kinds of materials have actually performed while they were being used.

We use OEM data for Manual S HVAC sizing - it is wrong to use AHRI data

Manual S HVAC Equipment Selection must use OEM data

This performance data gives valuable information and documentation on several different kinds of operating conditions. Manual S equipment selection includes extensive how-to tips on building systems that are sensitive to the specific environment in which you are working with. Basically, Manual S allows you to fine-tune what you have learned in Manual J. In Manual J you learned how to size the load, and in S you learn how to tweak that load to be specific to a particular climate or the ambient wishes and mood of your client.

Other important information included in Manual S equipment selection is instruction on how particular loads of ventilation and systems of air distribution will alter or dictate the size of the equipment you need and how it will perform. You will learn how to negotiate the state of the coil when outdoor air comes into the duct system; there are plenty of graphs and charts that exemplify this system. Manual S also debunks once and for all the idea that 400 CFM per ton is a hard and fast rule, arguing instead that the rates of the air flowing near the lower coil is more compatible with climates that are more moist and humid.

The information that a contractor gets from Manual J load analysis also makes it easier to select the exact right equipment.  Using Manual S equipment selection, a contractor is able to select a furnace and air conditioner that will perfectly fit with a home’s needs.  The right HVAC system will provide years of comfortable living for the resident.  It is also a much more reliable and long lasting system since it will work in a more effective way and require less maintenance overtime.  Energy savings lead directly to cost savings and that is a result that every homeowner will be happy with.