It is important to note that although the price of electricity per kwh may be more expensive than gas per kwh, a gas boiler burns more units of gas. Mortgage lenders and insurance company’s may/will request a drain survey drain 365 can provide reports that will satisfy all parties including solicitors for con29dw’s. All debit and credit cards accepted. Engineer did not turn up for the first appointment but the new engineers came the following day and were very good. The last option is only.