You know this is something that I’d love to get in to but there’s remodeling and home building companies that do these for free in my area (Alaska) as part of an energy upgrade. It sucks.
The cost of equipment, marketing and time, we’d have to charge a good amount per audit anyways.
I’ve seen some inspectors in the states though that include them in their inspections and just include that in their price per inspection. So instead of a $400 inspection they charge $550+. That’s probably how I would do it.
Retrotec is the top of the line. I used it for a couple of years (2010 and 2011) and sold it for more than I paid for it. As far as doing an energy audit without a blower door … if you are not able to accurately measure the air exchange rate before and after your recommended improvements, your audit is of little value. Spend the money but don’t be afraid to charge a decent price and you’ll get your investment back quite quickly.
Things you can do.
In your area, within a 100 kilometer radius or wider, ‘look at the competition.’
See how they market, SEO, and target your marketing message.
Look at the equipment they use and what they offer.
Remember “Imitation is the sincerest form of flattery that mediocrity can pay to greatness.”
Decent Infrared Thermal Camera. Seeing you are situated in the UK, Testo. Best bang for the buck IMO.
Crossover HVAC inspection equipment. You can use the equipment during home inspections.
Good Hygrometer. You can use the equipment during typical/usual home inspections.
See what it costs to Rent by the Day, Week and Month.
Line up prospective inspections to meet rental needs. Offer a 25 pound discount to get prospective clients lined up for a week of blower door tests.
I remember when many a new home inspectors were targeted by equipment sales manufacturers with blower door purchases. If you were looking at IR the sales pitch for a blower door equipment was not far behind. The spam came every day. InterNACHI member’s lists were used as targets as were new web site addresses.
This is a stand alone inspection.
Charge more!, Give more!, and go make a name for yourself if you feel that fits your business model.
Very physical process. I would not want to be doing blower door energy audits at my age.