Does seller need to replace old smoke detectors before selling

[Lakshay G.]

Hello,

I am purchasing a house located in Harford County in Maryland as a primary residence. The house is 14 years old and it still has original smoke detectors. The funny part (not really actually) is that the house has gas cooktop, fireplace, gas water heater, gas forced air heating and has NO carbon monoxide detectors. 

Should my agent force the listing agent to have all the detectors replaced or reduce the price of the house based on the cost of detectors? I googled this topic but I can't find any concrete answers. Montgomery County forces a document that a buyer has to sign that states regarding the house having more than 10 year old smoke detectors. In general all houses have to be updated in 2018. Can the transaction occur with old detectors? I was thinking of simply asking the seller to cover the parts expenses at least.

[Russell Brazil]

The law requires a particular type of smoke detector to be put in.  

However are you going to quibble over the cost of 2 or 3 smoke detectors that cost $20 each?