Maybe even a total roof replacement.
Life cycle for a roof top unit.
The moment the roof is installed it begins to age.
Physical damage walking on it hail tree limbs etc thermal shock.
The average premium black asphalt roof has an average life span of 14 years with the average life of a premium white roof is greater than 20 years.
Normal aging consists of.
If a roof doesn t last the desired 20 years the owner is likely to incur higher than average maintenance costs and towards the end of the roof s life also major renovation costs.
This web application provides an alternative to complicated building simulation models while offering more detail than simplified estimating tools that are commonly available.
The caveat is that those lifespan numbers always include the phrase with proper maintenance.
As a building owner superintendent or property manager it s important to understand what kind of maintenance your unit needs on a regular basis and how manufacturers define proper maintenance in regards to their units expected operating lifespans.
The expected life of a given roof in a given environment has the most impact on the roof s overall life cycle cost.
The lifespan typically ranges from 5 to 20 years.
A roof system s actual life span can vary depending on the local environment.
Commercial residential and rooftop hvac units all have an expected useful life.
Roof top air conditioners single zone 15 multi zone 15 boilers hot water steam steel water tube 24 30 steel fire tube 25 25 cast iron 35 30 electric 15 burners 21 furnaces gas or oil fired 18 unit heaters gas or electric 13 hot water or steam 20.
Our npv methodology assumes a 15 year life for the rooftop units as listed in 2015 ashrae applications table 4.
Heat of the sun.