not done it yet
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Finally fitted and tested the Chinese diesel heater , as previously mentioned I run it with a clean air intake for both the burner ignition burn and the heat exchanger input/ out put incase there are volatile fumes in the mancupboard . It also has a battery power supply on a trickle charger due to us having an unreliable mains supply. The charger blew the 5 amp fuse first time used , replaced it with an original LUCAS spade fuse out my box of 35 yr old ancient fuses .. every thing appears to be OK
Fuel wise about 1.2 litres on the lowest heat setting in 3.5 hrs which raised the mancupboard's internal temp on setting H 1 from 9 oC to 13 oC with the insulated roller shutter down . Cavity block walls and 100 mm insulated Kingspan plastisol galv roof .
Ran it today for a 3.5 hr. uninterrupted period ... well pleased with it .
I'm glad I took the time & spent more money to get the core drills & an extension to put the air inlets & exhaust through 16 i& 18 inches inches of cavity wall made with grit concrete block work. Rubber Rawl plugs for stress reduced mounting of things in the block walls didn't come cheap either ca. all extras including battery terminals , suitable cabling from battery to the supplied wiring IIRC £86 in total plus VAT .
The block work is such that I dare not trust it to take all steel anchor bolts nor plastic wall plugs and screws as it braeks up under the slightest pressure.
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It cost £88 plus VAT the extras needed to complete the install getting on for half that and having to wait for them to be delivered .
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Fresh air intake for the heat exchanger , I will be 3D printing two pipe adaptor collars as the alu concertina pipe is almost 5 inch internally slipped over the 75 mm stainles pipe going throughtnbeh wall and covering the heaters own air inlet flange
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Air intake filter on the left pointing down incase of heavy rain and the stainless exhaust 7 silencer on the right. After tomorrow the exhaust will be run via a 2 mtr extension tube through an aluminium tube through the greenhouse and out the other end as a simple fully sealed along it's length greenhouse warmer when I'm playing in the mancupboard .
Things for tomorrow perhaps ? Take a Tee off the boiler's oil supply and fit it with a proper oil resistant stop tap & small spout fairly low to the ground so I can fill the flexible spouted 6 litre filling can with heating oil and fill the heater's fuel tank with ease and without any oil spills . .
The problem I have found is that, when turned off, there can be a considerable draught (of cold air) entering through the ducting. Overnight, that can cool a space considerably… particularly on a frosty one!