Blackmon Mooring Air Conditioning, Heating, & Plumbing
One of the main ways lightning enters homes and buildings is through wires or
metal pipes that extend outside the structure. After it hits, it travels through the pipes and
wiring which it contacts.
I have been an HVAC/plumbing contractor since 1976 and have recently seen the
magnitude of damage where lightning struck metal B cap, a flue pipe protector. It
traveled down the metal stack, jumping in and out of the copper tubing, into the furnace
and then made its way to the two outside air-conditioning units before making a grand
exit out of the contactor.
According to the insurance adjuster , this house was fortunate. Most others are not as
fortunate. He further stated that a lightning strike of this magnitude usually burns the
house to the ground. Losing you home, personal belongings, even possibly your own or
family’s life can be devastating. It can all be gone in one strike of lightning. What an
eye opener this has been. I’ll never look at metal venting and metal vent caps the same
ever again.
On the 90 percent plus high-efficiency gas heating units and appliances such as
high-efficiency hot water heaters and boilers, PVC pipes are used rather than metal and
are topped off with E caps made of General Electric Geloy© resin which do not attract
lightning. Because it does not conduct electricity, this is a better system than the 80
percent units which use metal vent stacks and metal caps.
John Bernardo Conti, Jr.
Certified HVAC/Plumbing Contractor
Blackmon Mooring Air Conditioning, Heating, Plumbing
OK State Mechanical Contractor License # 5583
OK State Plumbing Contractor License # 2970






