
GAS TRADE TRAINING UNIT 18, 7th Edition (2020)
Water heaters and combination systems

GAS TRADE TRAINING UNIT 27A, 7th Edition (2020)
Commercial/Industrial appliances over 400 000 Btu/h (120 kW)

GAS TRADE TRAINING UNIT 29, 7th Edition (2020)
Advanced electricity for gas-fired equipment

Ontario Electrical Safety Code (OESC), 27th edition – 2018 (With October 2020 Bulletins)
Contains the Ontario Electrical Safety Code (C22.1 ON), with 2020 October Bulletins. epub version v4.0

GAS TRADE TRAINING UNIT 2, 6th Edition (2019)
Fasteners, tools, and testing instruments. epub version 1.1

GAS TRADE TRAINING UNIT 3, 6th Edition (2019)
Properties, characteristics, and safe handling of fuel gases. epub version 1.1

GAS TRADE TRAINING UNIT 4, 6th Edition (2019)
Utilization codes, acts, and regulations. epub version 1.1

GAS TRADE TRAINING UNIT 4A, 6th Edition (2019)
Utilization codes, acts, and regulations—Ontario supplement. epub version 1.1

GAS TRADE TRAINING UNIT 5, 6th Edition (2019)
Introduction to electricity. epub version 1.1

GAS TRADE TRAINING UNIT 6, 6th Edition (2019)
Technical manuals, specifications, drawings, and graphs. epub version 1.1