Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.


Tim McElwain
Tim McElwain Member Posts: 4,506
Modulating/Condensing Equipment

Volume II


This is my NEW Mod/Con manual just released. It is a 470 page manual; with many excellent subjects covered. There are chapters covering the following:


Understanding Boiler and Furnace AFUE

Boiler System Efficiency

Selecting Small Condensing Boilers

Installing Small Condensing Boilers

Maximizing Small Boiler Efficiency

Modulating is it efficient (Many statements by some of the “Gurus” of the industry)

Outdoor Reset with Baseboard

Honeywell MCBA Control

Weil-McLain Ultra Series 1

Weil-McLain Ultra Series 2

Weil-McLain Ultra Series 3

Weil-McLain Ultra Maintenance and Cleaning

Axiom Condensate Neutralization Kit


If you are interested contact me at [email protected] for further information.



  • Tim McElwain
    Tim McElwain Member Posts: 4,506
    For those interested

    that did not get Volume I of my Mod/Con manual we are offering a package deal for both volumes and it is quite a savings. Get in touch with me and I will send the information to you. My e-mail is [email protected]
This discussion has been closed.